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Property Evaluation of Tungsten-Carbide Hard Materials as a Function of Fe Contents
Fe 함량변화에 따른 텅스텐카바이드 초경소재의 특성평가
Ju-Hun Kim, Jeong-Han Lee, Junho Jang, Ik-Hyun Oh, Sung-Kil Hong, Hyun Kuk Park
김주훈, 이정한, 장준호, 오익현, 홍성길, 박현국
Korean J. Met. Mater. 2020;58(8):533-539.   Published online 2020 Jul 27
DOI: https://doi.org/10.3365/KJMM.2020.58.8.533

In this study, consolidated WC-Fe compacts as a function of Fe contents were fabricated by a spark plasma sintering method, following the mixed by the ball-milled powder. Fe among the metallic binders was added to WC enhance not only the driving force of sintering process but also suppressing the grain..... More

A Study on the Corrosion and Microstructure Characteristics of Early Iron Age Bronze Swords Excavated from Sinpung Site in Wanju, Jeollabuk-Do, Republic of Korea
전북 완주 신풍유적 출토 초기철기시대 동검의 부식 및 제작특성
Min Kyeong Jang, Nam Chul Cho
장민경, 조남철
Korean J. Met. Mater. 2020;58(7):472-479.   Published online 2020 Jul 5
DOI: https://doi.org/10.3365/KJMM.2020.58.7.472

The subject of this study was a bronze sword excavated from the early Iron Age area of Sinpung site in Wanju. SEM-EDS, FE-EPMA and Raman Micro-Spectroscopy analysis methods were applied to investigate the manufacturing techniques and corrosion characteristics. The results of the analysis indicated a casting structure composed of both..... More

Effect of Microstructure Control on the Mechanical Properties of Hot Worked TiAl Alloy
열간가공된 TiAl 합금의 미세조직 제어가 기계적 특성에 미치는 영향
Jong-hun Kim, Jae-Kwon Kim, Seong-Woong Kim, Yong-Ho Park, Seung Eon Kim
김종훈, 김재권, 김성웅, 박용호, 김승언
Korean J. Met. Mater. 2020;58(7):459-465.   Published online 2020 Jul 5
DOI: https://doi.org/10.3365/KJMM.2020.58.7.459

The microstructure and mechanical properties of a newly developed, β-phase containing TiAl alloy have been studied through hot working and post heat treatment to enhance room temperature ductility and strength. The controlled microstructures hadthree types of structure, fully lamellar, nearly lamellar and duplex, and were produced by cyclic heat-treatment in..... More

Effect of Strain Rate and Loading Direction on the Mechanical Properties of Ni-Cr-Al Superalloy Foam Fabricated by Powder Alloying Method
분말 합금법으로 제조된 Ni-Cr-Al 초합금 다공체의 인장 특성에 미치는 변형률 속도 및 하중 방향 효과
Kyu-Sik Kim, Jung-Suk Bae, Jae-Sung Oh, Kee-Ahn Lee
김규식, 배정석, 오재성, 이기안
Korean J. Met. Mater. 2020;58(6):375-382.   Published online 2020 May 20
DOI: https://doi.org/10.3365/KJMM.2020.58.6.375

The powder-alloyed metallic sheet foam manufacturing process has the advantage of being able to control pore shape, size, and distribution more easily and homogeneously than conventional foam manufacturing processes. The effects of strain rate and tensile direction on the mechanical properties of Ni-Cr-Al superalloy foam fabricated by powder alloying method..... More

Effect of Bainitic Microstructure on Low-Temperature Toughness of High-Strength API Pipeline Steels
고강도 API 라인파이프강의 저온 인성에 미치는 베이나이트계 미세조직의 영향
Seung-Wan Lee, Sang-In Lee, Byoungchul Hwang
이승완, 이상인, 황병철
Korean J. Met. Mater. 2020;58(5):293-303.   Published online 2020 Apr 20
DOI: https://doi.org/10.3365/KJMM.2020.58.5.293

In this study the correlation between bainitic microstructure and the low-temperature toughness of high-strength API pipeline steels was discussed in terms of crack initiation and propagation in the microstructure. Three types of API pipeline steels with different bainitic microstructures were fabricated using varying alloying elements and thermo-mechanical processing conditions, and..... More

Influence of Alloy Content on Microstructure and Corrosion Resistance of Zn-based Alloy Coated Steel Product
Zn계 합금도금재의 미세구조 및 내식성에 미치는 합금 조성 변화 영향
Jae-Won Lee, Sung-Jin Kim, Min-Suk Oh
이재원, 김성진, 오민석
Korean J. Met. Mater. 2020;58(3):169-174.   Published online 2020 Mar 5
DOI: https://doi.org/10.3365/KJMM.2020.58.3.169

The effects of alloy composition on the coating structure and corrosion resistance of hot-dip Znbased alloy coated steel products were investigated. Zn-based alloy coating layers with different Al and Mg compositions were fabricated using a batch-type galvanizing simulator. Various intermetallic compounds including Zn, Zn/MgZn2 binary eutectic, Zn/Al binary eutectoid and..... More

Effect of Heat Treatment on Mechanical Properties and Energy Absorption Capacity of 7003 Aluminum Alloy
7003 알루미늄 합금의 기계적 성질 및 에너지 흡수능에 미치는 열처리 조건의 영향
Hee-Ju Kim, Jeki Jung, Su-Hyeon Kim, Cha-Yong Lim, Yoon Suk Choi
김희주, 정제기, 김수현, 임차용, 최윤석
Korean J. Met. Mater. 2020;58(1):7-16.   Published online 2019 Dec 12
DOI: https://doi.org/10.3365/KJMM.2020.58.1.7

The effects of heat treatment conditions on the mechanical properties and energy absorption capacity of 7003 (Al-6Zn-0.6Mg) aluminum alloy were studied. The extruded material was heat treated at various temperatures to prepare annealed or aged specimens. Tensile tests, hardness measurements, electron backscatter diffraction characterizations, and differential scanning calorimeter analyses were..... More

Demonstration Testing of Boiler Tubes in a Clean Power Test-Bed Plant
Yeon kwan Kang, Yinsheng He, Han-Sang Lee, Beom-Soo Kim, Liming Xu, Keesam Shin
Korean J. Met. Mater. 2019;57(12):817-827.   Published online 2019 Nov 22
DOI: https://doi.org/10.3365/KJMM.2019.57.12.817

The use of locally developed high performance alloys in power plants has become essential in the past ten years. Application of these alloys has been difficult because of a shortage of field demonstration testing, and the lack of lab-based test data. In this work, three types of locally developed heat..... More

                           Cited By 1
Microstructure and Mechanical Properties of Continuous Welded 50N Rail
Wookjin Choi, Min Ji Song, Nam-Hyoung Lim, Soo Yeol Lee
Korean J. Met. Mater. 2019;57(12):755-763.   Published online 2019 Dec 5
DOI: https://doi.org/10.3365/KJMM.2019.57.12.755

Rails are subjected to repeated stresses due to wheel-rail contact during train service. Rails under stress conditions undergo microstructural changes, and these cause degradations of the structural integrity and lifetime of rails. In this study, three different rails (newly-manufactured rail, newly-manufactured head-hardened rail, and worn (used) rail) were compared to..... More

Effect of Rolling Temperature on the Microstructural Characteristics of High-Speed-Rolled Mg Alloy with Initial Non-Basal Texture
비기저면 집합조직을 가지는 마그네슘 합금의 고속압연 온도 변화에 따른 압연재 미세조직 변화
Su Jin Lee, Ye Jin Kim, Jeong Hun Lee, Sung Hyuk Park
이수진, 김예진, 이정훈, 박성혁
Korean J. Met. Mater. 2019;57(8):482-490.   Published online 2019 Jul 4
DOI: https://doi.org/10.3365/KJMM.2019.57.8.482

In this study, the effects of rolling temperature on the microstructural characteristics of a highspeed-rolled Mg alloy with a non-basal texture were investigated. To this end, commercial AZ31 alloy samples in which the basal poles of most grains were tilted at an angle of 45° from the normal direction (ND)..... More

Study of Shape and Microstructure Changes of Ta Linear for Building an Explosively Formed Penetrator
탄탈륨 라이너의 폭발성형관통자 형성 시 형상 및 조직 변화 연구
Sung Taek Park, Ju Yeong Kim, Gwang Lyeon Kim, Hyun-Su Kang, Kyeong Won Oh, Hyung-Ki Park, Yi Hwa Song
박성택, 김주영, 김광련, 강현수, 오경원, 박형기, 송이화
Korean J. Met. Mater. 2019;57(8):475-481.   Published online 2019 Aug 5
DOI: https://doi.org/10.3365/KJMM.2019.57.8.475

An explosively formed penetrator (EFP) is a kind of kinetic energy warhead that contains a metal linear structure. After exploding, the linear structure in the EFP is deformed and hits the target as a form of aero-stable long-rod penetrator. To achieve high penetration performance, Ta is commonly used as the..... More

Room and Elevated Temperature Compressive Deformation Behavior of AISI 316L Alloy Fabricated by Selective Laser Melting Process
Selective laser melting 공정으로 제조된 AISI 316L 합금의 상온 및 고온 압축 변형 거동
Gi-Su Ham, Soon-Hong Park, Kee-Ahn Lee
함기수, 박순홍, 이기안
Korean J. Met. Mater. 2019;57(5):295-303.   Published online 2019 May 5
DOI: https://doi.org/10.3365/KJMM.2019.57.5.295

This study investigated the microstructure and compressive properties (at room & high temperatures) of Fe-Cr-Ni based AISI 316L alloy, manufactured by selective laser melting process. The effect of stress relieving heat treatment on the microstructure and mechanical properties also examined. Regardless of the stress relieving heat treatment, the SLMed AISI..... More

Hydride Precipitation Behavior with Hydrogen Concentration and Homogenization Temperature in Zr-2.5%Nb Pressure Tube Material
Zr-2.5%Nb 압력관 재료에서 수소 농도와 균질화 처리 온도에 따른 수소화물 석출 거동
Sang Yup Lim, SungSoo Kim, Gyeong-Geun Lee
임상엽, 김성수, 이경근
Korean J. Met. Mater. 2019;57(4):203-213.   Published online 2019 Apr 5
DOI: https://doi.org/10.3365/KJMM.2019.57.4.203

The precipitation characteristics of hydrides in Zr-2.5% Nb pressure tube material were investigated for various hydrogen concentrations and homogenization temperatures. A surface hydride was formed using the electrolytic method and homogenized at various temperatures up to at 550 oC. The homogenization treatment was carried out at 300-550 oC over 240..... More

Estimation of Chemical Composition of Al-Si Cast Alloys Using Image Recognition
화상인식을 이용한 Al-Si 주조용 합금의 화학조성 예측
Sang-Jun Jeong, In-Kyu Hwang, In-Sung Cho, Hee-Soo Kim
정상준, 황인규, 조인성, 김희수
Korean J. Met. Mater. 2019;57(3):184-192.   Published online 2019 Feb 14
DOI: https://doi.org/10.3365/KJMM.2019.57.3.184

In this study, we analyzed the chemical composition of Al-Si cast alloys from microstructural images, using image recognition and machine learning. Binary Al-Si alloys of Si = 1~10 wt% were cast and prepared as reference images in the dataset used for machine learning. The machine learning procedure was constructed with..... More

                           Cited By 1
Effects of Zn(BH<sub>4</sub>)<sub>2</sub>, Ni, and/or Ti Doping on the Hydrogen-Storage Features of MgH<sub>2</sub>
Myoung Youp Song, Young Jun Kwak
Korean J. Met. Mater. 2019;57(3):176-183.   Published online 2019 Feb 8
DOI: https://doi.org/10.3365/KJMM.2019.57.3.176

In the present work, MgH2 was doped with Zn(BH4)2, Ni, and/or Ti to improve its hydrogen absorption and release features. Samples were prepared by grinding in a planetary ball mill in a hydrogen atmosphere. To increase the hydrogen absorption and release rates without significantly sacrificing hydrogenstorage capacity the additive percentages..... More

                           Cited By 1
Effect of Cr Electroplating Layer Thickness on the Tensile and High Cycle Fatigue Properties of AISI 1045 Steel
AISI 1045 강의 인장 및 고주기 피로 특성에 미치는 Cr 도금층 두께의 영향
Gi-Su Ham, Yeon-Ji Kang, Hyung-Jun Kim, Sang-Hoon Yoon, Kee-Ahn Lee
함기수, 강연지, 김형준, 윤상훈, 이기안
Korean J. Met. Mater. 2019;57(3):138-145.   Published online 2019 Feb 14
DOI: https://doi.org/10.3365/KJMM.2019.57.3.138

This study investigated and compared the tensile and high-cycle fatigue properties of AISI 1045 steel and Cr electroplated AISI 1045 steel. First, tensile and fatigue specimens were machined from AISI 1045 steel (substrate), and two kinds of Cr electroplating layers with different layer thickness were applied. The substrate, AISI 1045..... More

                           Cited By 1
Effect of Shear Deformation During Drawing on Inhomogeneous Microstructures and Textures in High Purity Copper Wires After Annealing
고순도 구리 선재의 어닐링 후 불균질 미세조직과 집합조직에 미치는 신선 시 전단 변형의 영향
Hyun Park, Sang-Hyeok Kim, Se-Jong Kim, Hyo-Jong Lee
박현, 김상혁, 김세종, 이효종
Korean J. Met. Mater. 2018;56(12):861-869.   Published online 2018 Dec 5
DOI: https://doi.org/10.3365/KJMM.2018.56.12.861

To determine the origin of the inhomogeneous microstructure and texture observed in drawn and annealed high purity copper wires, two kinds of drawing process conditions and their influence was investigated. The regular condition, based on a symmetric die, and a condition designed intentionally to produce an inhomogeneous shear deformation using..... More

                           Cited By 1
Effect of Microstructural Factors on Fatigue and Fatigue Crack Propagation Behaviors of Mill-Annealed Ti-6Al-4V Alloy
미세조직적 인자가 밀소둔된 Ti-6Al-4V 합금의 피로 및 피로균열전파 거동에 미치는 영향
Sanghoo Park, Sumin Kim, Daeun Lee, Soojin Ahn, Sangshik Kim
박상후, 김수민, 이다은, 안수진, 김상식
Korean J. Met. Mater. 2018;56(12):845-853.   Published online 2018 Dec 5
DOI: https://doi.org/10.3365/KJMM.2018.56.12.845

To understand the effect of microstructural factors (i.e., the size of α phase, equiaxed vs bimodal structure) on high cycle fatigue (HCF) and fatigue crack propagation (FCP) behaviors of mill-annealed Ti-6Al- 4V (Ti64) alloy, three specimens of EQ (equiaxed)–8 (8 indicates the size of α grain), BM (bimodal)-8, and BM-..... More

                           Cited By 3
Effect of Heat Treatment on the Microstructure and Mechanical Properties of W-7Ni-3Fe Tungsten Heavy Alloy Manufactured by Metal Injection Molding Process
Metal Injection Molding 공정으로 제조된 W-7Ni-3Fe 텅스텐 중합금의 미세조직 및 기계적 특성에 미치는 열처리의 영향
Seong-June Youn, Yeun-Ah Joo, Tae-Shik Yoon, Kee-Ahn Lee
윤성준, 주연아, 윤태식, 이기안
Korean J. Met. Mater. 2018;56(10):727-733.   Published online 2018 Oct 5
DOI: https://doi.org/10.3365/KJMM.2018.56.10.727

This study investigated the microstructure and room temperature mechanical properties of W-7Ni-3Fe (wt%) tungsten heavy alloy (as-fabricated) which was manufactured by metal injection molding (MIM). To identify the effect of heat treatment on the W-7Ni-3Fe alloy, its properties were compared after heattreatment (1,100 oC for 1 hour) in vacuum atmosphere...... More

Effect of MgO Addition on the Monoclinic to Tetragonal Transition of ZrO<sub>2</sub> Fabricated by High Energy Ball Milling
Ashutosh Sharma, Byungmin Ahn
Korean J. Met. Mater. 2018;56(10):718-726.   Published online 2018 Oct 5
DOI: https://doi.org/10.3365/KJMM.2018.56.10.718

In this work, we studied the formation of partially stabilized zirconia by a high energy ball milling (HEBM) approach. Zirconia powder was mixed with 8 mol% MgO and the powder mixture was milled for 10 hours. The structural and morphological evolutions of the powder particles were studied using X-ray diffraction..... More

Tensile Properties at Room and Elevated Temperatures and High-Cycle Fatigue Properties of Extruded AZ80 and TAZ711 Alloys
AZ80과 TAZ711 마그네슘 압출재의 상온 및 고온 인장 특성과 고주기 피로 특성
Sang Won Lee, Sang-Hoon Kim, Sung Hyuk Park
이상원, 김상훈, 박성혁
Korean J. Met. Mater. 2018;56(10):699-707.   Published online 2018 Oct 5
DOI: https://doi.org/10.3365/KJMM.2018.56.10.699

The microstructure, tensile properties at room and elevated temperatures, and high-cycle fatigue behavior of an extruded Mg-7Sn-1Al-1Zn (TAZ711) alloy were investigated in comparison with those of an Mg-8Al-0.5Zn (AZ80) alloy extruded under the same conditions. The extruded AZ80 alloy exhibited a fully recrystallized structure, whereas the extruded TAZ711 alloy had..... More

                           Cited By 1
Microstructure Evaluation and Low Cycle Fatigue Damage due to Degradation of Ni-based Superalloy
니켈기 초내열합금의 열화에 따른 미세구조 및 저주기 피로손상도 평가
Inkang Heo, Donghyun Yoon, Sanghyun Hong, Jinyeol Kim, Jaehoon Kim, Sungho Chang, Siyeon Bae
허인강, 윤동현, 홍상현, 김진열, 김재훈, 장성호, 배시연
Korean J. Met. Mater. 2018;56(8):561-569.   Published online 2018 Aug 5
DOI: https://doi.org/10.3365/KJMM.2018.56.8.561

Nickel-based superalloys have excellent resistance to extreme environments such as high temperature and high stress and are used as materials for large gas turbines. In this paper, specimens were taken from a blade that had been used for a long time, and their life span was studied by analysis of microstructure...... More

                           Cited By 2
Hydrogen Storage Properties of Mg-Graphene Composites
Myoung Youp Song, Young Jun Kwak, Eunho Choi
Korean J. Met. Mater. 2018;56(7):524-531.   Published online 2018 Jul 5
DOI: https://doi.org/10.3365/KJMM.2018.56.7.524

To improve the hydrogen uptake and release properties of magnesium (Mg), five weight percent of graphene was added to pre-milled Mg by milling in hydrogen (reaction-involving milling). The hydrogen uptake and release properties of the graphene-added Mg (named Mg-5graphene) were investigated. Premilling of Mg (for 24 h) and then adding..... More

                           Cited By 7
Effects of Si on the Characteristics of FCA Multi-Layer Weld Metal with 460 MPa Yield Strength Grade Steels for Ships and Marine Structures
선박 및 해양구조물용 항복강도 460 MPa급 강재의 FCA 다층 용접금속부 특성에 미치는 규소의 영향
Jong-Sig Kim, Myeong-Soo Lee, Jong-Min Jung, Han-Geul Choi, Sang-Hoon Jeong, Chang-Yong Kang
김종식, 이명수, 정종민, 최한글, 정상훈, 강창룡
Korean J. Met. Mater. 2018;56(7):499-504.   Published online 2018 Jul 5
DOI: https://doi.org/10.3365/KJMM.2018.56.7.499

This study investigated the effect of Si on the characteristics of FCA multi-layer weld metal with 460 MPa yield strength grade steels for ships and marine structures. The effect on microstructure was evaluated by tensile, charpy impact and CTOD testing of 4 FCAW welds containing various C and Si contents...... More

                           Cited By 1
Microstructure and Room Temperature Wear Properties of a Ni-Cr-B-Si-C Coating Layer Manufactured by the Laser Cladding Process
Laser Cladding 공정으로 제조된 Ni-Cr-B-Si-C 코팅층의 미세조직 및 상온 마모 특성
Tae-Hoon Kang, Kyu-Sik Kim, Soon-Hong Park, Kee-Ahn Lee
강태훈, 김규식, 박순홍, 이기안
Korean J. Met. Mater. 2018;56(6):423-429.   Published online 2018 Jun 4
DOI: https://doi.org/10.3365/KJMM.2018.56.6.423

A Ni-Cr-B-Si-C coating layer was manufactured on a plate of Fe base alloy using a laser cladding process, and the microstructural and mechanical properties of the laser cladded coating layer and a Ni electroplating layer (used as a reference material) were investigated. To identify the microstructural and mechanical properties, scanning..... More

                           Cited By 3
Correlation of Microstructural Factors with the Yield Ratio and Uniform Elongation in API X80 Linepipe Steels
API X80 라인파이프강의 미세조직적 인자와 항복비 및 균일 연신율의 상관관계
Sang-In Lee, Seung-Wan Lee, Seok Gyu Lee, Sunghak Lee, Hwan Gyo Jung, Byoungchul Hwang
이상인, 이승완, 이석규, 이성학, 정환교, 황병철
Korean J. Met. Mater. 2018;56(6):413-422.   Published online 2018 Jun 4
DOI: https://doi.org/10.3365/KJMM.2018.56.6.413

In the present study, the correlation of microstructural factors with yield ratio and uniform elongation was investigated in API X80 linepipe steels with different microstructures by varying thermomechanical control process conditions. The grain size and microstructure fraction of the API X80 linepipe steels were quantitatively measured by EBSD analysis and then..... More

                           Cited By 3
Characterization of Microstructures and Creep Fracture Characteristics of Dissimilar Metal Welds between Inconel 740H Ni-Based Superalloy and Gr.92 Ferritic Steel
니켈기 Inconel 740H 초내열합금과 고Cr계 Gr.92 내열강의 이종금속 용접부의 미세조직 및 크리프 파단 특성
Kyeong-Yong Shin, Ji-Won Lee, Jung-Min Han, Kyong-Woon Lee, Byeong-Ook Kong, Hyun-Uk Hong
신경용, 이지원, 한정민, 이경운, 공병욱, 홍현욱
Korean J. Met. Mater. 2018;56(5):375-383.   Published online 2018 May 8
DOI: https://doi.org/10.3365/KJMM.2018.56.5.375

Microstructure evolution and the creep fracture characteristics of dissimilar welds between Ni-based superalloy Inconel 740H and High Cr ferritic steel Gr.92 were investigated. The dissimilar welds were fabricated by shielded metal arc (SMA) welding process with Ni-based austenitic Inconel 182 superalloy. Postweld heat treatment at 760 oC for 4 hours..... More

         Cited By 3
Effects of Heat Treatment and Thermal Cycle Conditions on the Bonding Strength and Interfacial Characteristics of Electroplated Cr/Electroplated Ni-P Coatings
열처리 및 열 사이클 조건에 따른 전해 Cr/전해 Ni-P 도금의 접합강도 평가 및 계면분석
Jina Lee, Kirak Son, Myung-Hee Choi, Kyu Hwan Lee, Young-Bae Park
이진아, 손기락, 최명희, 이규환, 박영배
Korean J. Met. Mater. 2018;56(4):280-288.   Published online 2018 Apr 5
DOI: https://doi.org/10.3365/KJMM.2018.56.4.280

The effects of heat treatment and thermal cycle conditions on the bonding strength and interfacial characteristics of electroplated Cr/electroplated Ni-P coatings were systematically evaluated. With step1 samples, heat treatment was performed at 750 oC for 6 hours after successive electroplating of Ni-P and Cr layers. With step2 samples, 1st heat..... More

Comparison of the Hydrogen Release Properties of Zn(BH<sub>4</sub>)<sub>2-</sub>Added MgH<sub>2</sub> Alloy and Zn(BH<sub>4</sub>)<sub>2</sub> and Ni-Added MgH<sub>2</sub> Alloy
Myoung Youp Song, Young Jun Kwak
Korean J. Met. Mater. 2018;56(3):244-251.   Published online 2018 Mar 6
DOI: https://doi.org/10.3365/KJMM.2018.56.3.244

Samples with compositions of 99 w/o MgH2+1 w/o Zn(BH4)2 (designated MgH2-1Zn(BH4)2) and 96 w/o MgH2+2 w/o Zn(BH4)2+2 w/o Ni (designated MgH2-2Zn(BH4)2-2Ni) were prepared by milling in a planetary ball mill in a hydrogen atmosphere (reaction-involving milling). The hydrogen release properties of MgH2- 1Zn(BH4)2 and MgH2-2Zn(BH4)2-2Ni were compared. A larger quantity..... More

Effect of Hot Forging and Heat Treatment on the Microstructure and Mechanical Properties of Cr Steel
Cr강의 미세조직과 파괴인성에 미치는 열간단조 및 열처리 공정의 영향
Dong Jun Lee, Yong-Nam kwon, Min Suk Kim, Ga Eun Ku, Sang Hyun Heo, Nam Yong Kim, Jin-Mo Lee
이동준, 권용남, 김민석, 구가은, 허상현, 김남용, 이진모
Korean J. Met. Mater. 2018;56(3):221-226.   Published online 2018 Mar 6
DOI: https://doi.org/10.3365/KJMM.2018.56.3.221

In this study, the effects of hot forging and heat treatment (quenching and tempering) of cast Cr alloy steel on the microstructures and mechanical properties were investigated. The hot forging was performed at a compressive ratio 0.5 at 1,250 oC. The heat treatment process was quenching (860 oC for 2..... More

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