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Alternative TitleMicrostructure transformation and difference of 316L stainless steel by laser deposition on surface of mold steel
王志国1,2; 何振丰1,2; 赵吉宾1,2; 赵宇辉1,2,3; 聂长武1; 张宏伟4,5
Source Publication材料工程
Indexed ByEI
EI Accession number20210909982043
Contribution Rank1
Funding Organization国家重点研发计划(2018YFB1105802) ; 国家自然科学基金(51805526)
Keyword模具钢 激光沉积 316L 界面 组织转变


Other Abstract

In order to reveal the microstructure transformation mechanism of the process of depositing dissimilar material on the surface of mold steel containing Cr, the 316L stainless steel was deposited on two kinds of mold steel. The microstructure and hardness were characterized by SEM, EPMA, XRD etc, moreover, the mechanism of microstructure transformation in the interface and deposition zone was analyzed by the combination of melting-solidification dynamic process and Schaeffler diagram. The results show that the microstructure near the deposition interface shows obviously different characters due to the difference of matrix element composition and phase distribution. The thickness of transition zone of high Cr ledeburite steel is 200μm, the transition zone is obviously different from other areas of the deposition layer in terms of its morphology and phase; the carbidesin the transition zone undergo complex changes, such as local aggregation and growth at first, and then uniform distribution among dendrites. However, the thickness of microstructure transition zone of the deposition layer in P20 steel is less than 20μm, the microstructure grows in the form of dendrite and is connected with then on transition zone of the deposition layer, meanwhile, dispersed granular carbides are found in the dendrites. Under the action of the dynamic changes of C, Cr, Ni and other elements in the molten pool, the composition phase of the non transition zone in the two kinds of steel deposition layers is also obviously different; the matrix phases of deposition layers in high Cr ledeburite steel and P20 steel are austenite phase and martensite phase respectively, as a result, the range of hardness variation is 295-325HV0.2 and 500-575HV0.2, respectively.

Document Type期刊论文
Corresponding Author赵吉宾
Recommended Citation
GB/T 7714
王志国,何振丰,赵吉宾,等. 模具钢表面激光沉积316L不锈钢的组织转变及差异性[J]. 材料工程,2021,49(2):105-113.
APA 王志国,何振丰,赵吉宾,赵宇辉,聂长武,&张宏伟.(2021).模具钢表面激光沉积316L不锈钢的组织转变及差异性.材料工程,49(2),105-113.
MLA 王志国,et al."模具钢表面激光沉积316L不锈钢的组织转变及差异性".材料工程 49.2(2021):105-113.
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