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Effects of Heat Treatment Condition and Counter Materials on the Wear Behavior of Laser Direct Energy Deposited Fe-8Cr-3V-2Mo-2W Alloy
레이저 직접적층법으로 제조된 Fe-8Cr-3V-2Mo-2W합금의 마모특성에 미치는 열처리공정 및 상대재의 영향
Kyeongsik Ha, Young Keun Park, Taehwan Kim, Gyeong Yun Baek, Jong Bae Jeon, Do-sik Shim, Young Hoon Moon, Wookjin Lee
하경식, 박영근, 김태환, 백경윤, 전종배, 심도식, 문영훈, 이욱진
Korean J. Met. Mater. 2020;58(10):680-692.   Published online 2020 Oct 5
DOI: https://doi.org/10.3365/KJMM.2020.58.10.680

This study aimed to investigate the wear performance of laser direct energy deposited Fe-8Cr3V-2Mo-2W alloy under various wear environments, in terms of different heat treatment conditions. Ball on disk tribology tests were performed using high-carbon steel and zirconia balls as counter materials. The wear rates of the alloy depended significantly..... More

Effects of Al-Si Coating Thickness on 22MnB5 in Hot Stamping Wear
Al-Si 도금층 두께가 22MnB5강의 핫스탬핑 공정 마모에 미치는 영향
Min Ki Ji, Hyunsung Son, Jinkeun Oh, Seongwoo Kim, Kyungmok Kim, Tea-Sung Jun
지민기, 손현성, 오진근, 김성우, 김경목, 전태성
Korean J. Met. Mater. 2020;58(8):573-582.   Published online 2020 Jul 27
DOI: https://doi.org/10.3365/KJMM.2020.58.8.573

Al-Si coated ultra-high strength steels (UHSS) are widely used in automotive applications because of their high strength-to-weight ratio, corrosion protection and good weldability. The hot stamping (also called hot press forming) process is an effective and suitable technique for producing automotive parts from Al-Si coated UHSS. However, critical issues, such..... More

Improvement of Wear Resistance in Laser Shock-Peened Copper Contacts
Donghyuck Jung, Changkyoo Park, Eun-Joon Chun, Yoon-Jun Kim
Korean J. Met. Mater. 2020;58(8):560-565.   Published online 2020 Jul 27
DOI: https://doi.org/10.3365/KJMM.2020.58.8.560

This study investigated the influence of laser shock peening without coating (LSPw/oC) on the degradation of copper electrical contacts. A theoretical calculation of the plastic-affected depth (PAD) induced by LSPw/oC was performed, based on the laser-induced plasma pressure along with the Hugoniot elastic limit of our LSPw/oC experimental conditions. The..... More

Effect of Co Leaching on the Vertical Turning Lathe Wear Properties of Polycrystalline Diamond Compact Manufactured by High Temperature and High Pressure Sintering Process
초고온·고압 소결 공정으로 제조된 다결정 다이아몬드 컴팩트(PDC)의 VTL 마모 특성에 미치는 Co 제거의 영향
Min-Seok Baek, Ji-Won Kim, Bae-Gun Park, Hee-Sub Park, Kee-Ahn Lee
백민석, 김지원, 박배건, 박희섭, 이기안
Korean J. Met. Mater. 2020;58(7):480-487.   Published online 2020 Jul 5
DOI: https://doi.org/10.3365/KJMM.2020.58.7.480

Polycrystalline diamond compact (PDC) has excellent wear resistance, high impact resistance, superior fatigue properties, and has been used in the oil and gas drilling industries. This study investigated the effect of Co leaching on the microstructure, vertical turning lathe (VTL) wear properties of PDCs manufactured by high-temperature and high-pressure (HTHP)..... More

A Study on Micro-Structure and Wear Behavior of AISI M4 and CPM15V Deposited by Laser Melting
레이저 용융 적층 기술을 이용한 AISI M4와 CPM15V 분말 적층부의 미세 조직 및 마모 특성에 관한 연구
Gyeong Yun Baek, Gwang Yong Shin, Ki Yong Lee, Do Sik Shim
백경윤, 신광용, 이기용, 심도식
Korean J. Met. Mater. 2018;56(6):430-439.   Published online 2018 Jun 4
DOI: https://doi.org/10.3365/KJMM.2018.56.6.430

AISI M4 and CPM15V are used as tool steels since they have high hardness and wear resistance. This study is concerned with die and mold hardfacing using laser melting deposition with M4 and CPM15V powders. For this purpose, the two types of metal powders were deposited on SKD11 base metal,..... More

                           Cited By 3
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 4
Development of the Elastic Modulus of 100 GPa Casting Alloys by Nickel Addition
니켈 첨가에 의한 탄성 100 GPa급 알루미늄 주조재 개발
Tae-Gyu Lee, Hoo-Dam Lee, Jong-Kuk Lee
이태규, 이후담, 이종국
Korean J. Met. Mater. 2017;55(12):845-852.   Published online 2017 Dec 4
DOI: https://doi.org/10.3365/KJMM.2017.55.12.845

In this research, we studied the effects of Ni, Ti, and B on the elastic modulus of hypereutectic Al-Si alloys and successfully synthesized 100 GPa Al casting alloys by designing various alloys phases. Generally, Al–Si based alloys are known in the automotive industry to be good casting alloys with high..... More

Effect of Diamond Particle Size on the Microstructure and Wear Property of High Pressure High Temperature (HPHT) Sintered Polycrystalline Diamond Compact (PDC)
초 고온・고압 소결된 다결정 다이아몬드 컴팩트의 미세조직 및 마모 특성에 미치는 다이아몬드 입자 크기의 영향
Min-Seok Baek, Hee-Sub Park, Jae-il Lee, Kee-Ahn Lee
백민석, 박희섭, 이재일, 이기안
Korean J. Met. Mater. 2017;55(11):790-797.   Published online 2017 Oct 31
DOI: https://doi.org/10.3365/KJMM.2017.55.11.790

A polycrystalline diamond compact (PDC) is a two-stage sintered body manufactured by placing diamond powders on a WC-Co hard material and then applying the high pressure high temperature (HPHT) sintering process. This study investigated the microstructure and wear properties of the PDC depending on initial diamond particle size. Three different..... More

Effect of Added Gas-Atomized Al-Si/SiC<sub>p</sub> Composite Powder on the Sinterability and Mechanical Properties of Alumix 431 fabricated by Hot-Pressing Process
Eunsun Lee, Jeong-Jung Oak, Yongjin Kim, Yongho Park
Korean J. Met. Mater. 2017;55(2):98-109.   Published online 2017 Feb 2
DOI: https://doi.org/10.3365/KJMM.2017.55.2.98

The aim of this study is to establish an optimized hot-press sintering condition for aluminum matrix composites (AMCs) by analyzing their sintered microstructure and mechanical properties. The fabricated AMCs in this study consisted of a blend of commercial Ecka Alumix 431 powder, and Al-Si/SiCp powder manufactured by gas atomizer (Al-Si/SiCp)...... More

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