Nitriding of martensitic steel after laser melting deposition

被引：1

作者：

Tsvetkova, E. ^{[1
]}

Bazaleeva, K. ^{[2
]}

Smirnov, A. ^{[1
]}

Chekin, I ^{[1
]}

机构：

[1] Bauman Moscow State Tech Univ, 2 Baumanskaya 5, Moscow, Russia

[2] AO VNIINM, Rogova 5a, Moscow, Russia

来源：

BEAM TECHNOLOGIES AND LASER APPLICATION | 2018年 / 1109卷

关键词：

D O I：

10.1088/1742-6596/1109/1/012054

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this study martensitic steel Fe-13% Cr-2% Ni-0.25% C in three initial state was nitrided. The steel in the initial state was made by laser melting deposition (LMD), LMD and tempering and quenching and tempering. The structure of steel after LMD was martensitic and sorbit after LMD and tempering and quenching and tempering. The result of research showed that the nitrided layer of steel after LMD is 160 mu m, which exceeds the thickness of the nitrided layer of the steel after quenching and tempering by approximately 2 times. In steel after LMD and tempering, the thickness of the nitrided layer is 140 mu m. The microhardness of nitrided layers of steel in all three initial state is HV 0.1 900-1000 due to the formation of Fe4N and CrN nitrides. The drop in microhardness over the thickness of the nitrided layer of steel after LMD occurs more smoothly than that of steel after the quenching and tempering, and the thickness of its transition zone is 80 mu m against 20 mu m in steel after quenching and tempering.

引用

页数：8

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