Preparation of 24CrNiMoY alloy steel with high strength and toughness by selective laser melting

IF 1.9 4区 材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING
M. Sun, Suiyuan Chen, M. Wei, Jing Liang, Changsheng Liu, Mei Wang
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引用次数: 0

Abstract

ABSTRACT 24CrNiMoY alloy steel with high strength and toughness was prepared by selective laser melting (SLM) technology. The microstructure and mechanical properties of alloy steel samples prepared by SLM using different laser energies were studied. The results showed that with increasing energy density, the internal defects of the sample first decreased and then increased, and the hardness and tensile properties also showed a trend of increasing at first but decreasing afterwards. When the energy density was 100.7 J/mm3, the alloy steel sample has the fewest defects and the highest hardness (391.2 HV0.2). The tensile strength and impact toughness also reached the best state: the tensile strength was 1252.83 MPa, the yield strength was 1041.62 MPa, the elongation to fracture was 12.89%, and the impact toughness was 65.7 J. The microstructure of 24CrNiMoY alloy steel prepared by SLM is mainly composed of fine lath martensite, which has good strength and toughness.
选择性激光熔炼制备高强度高韧性24CrNiMoY合金钢
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来源期刊
Powder Metallurgy
Powder Metallurgy 工程技术-冶金工程
CiteScore
2.90
自引率
7.10%
发文量
30
审稿时长
3 months
期刊介绍: Powder Metallurgy is an international journal publishing peer-reviewed original research on the science and practice of powder metallurgy and particulate technology. Coverage includes metallic particulate materials, PM tool materials, hard materials, composites, and novel powder based materials.
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