Selective laser sintering of steel powders to obtain products based on SAPR-models

被引：12

作者：

Kovalev, AI

Vainshtein, DL

Mishina, VP

Titov, VI

Moiseev, VF

Tolochko, NK

机构：

[1] Russian Acad Sci, AA Baikov Met Inst, Moscow 117901, Russia

[2] Moscow Tech Inst STANKIN, Moscow, Russia

来源：

METALLURGIST | 2000年 / 44卷 / 3-4期

关键词：

Martensite; Cementite; Laser Treatment; Selective Laser Sinter; Powder Steel;

D O I：

10.1007/BF02466080

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Liquid-phase laser sintering based on Rapid Prototyping technology can be successfully used on powder steel 3Kh3F12, the structure of which has a high concentration of a low-melting carbide eutectic. No low-melting additives are needed in this case.Optimization of the parameters of the laser fusion of powder steel for the duration of the production process makes it possible to obtain small compact specimens (5 mm in diameter and 30 mm in length).Sintered specimens of steel 3Kh3F12 have a microstructure of ledeburite and martensite with 15% vanadium carbides and 16% residual austenite.Despite the high cooling rates (100–1000°C/sec), multicomponent segregation along grain boundaries is seen in the specimens after the laser treatment.

引用

页码：206 / 209

页数：4