LASER SURFACE ALLOYING OF CARBON-STEEL AND ALPHA-FE WITH CRB2 PARTICLES

被引：29

作者：

SHAFIRSTIEN, G ^{[1
]}

BAMBERGER, M ^{[1
]}

LANGOHR, M ^{[1
]}

MAISENHALDER, F ^{[1
]}

机构：

[1] DLR,LASER APPLICAT LAB,STUTTGART,GERMANY

来源：

SURFACE & COATINGS TECHNOLOGY | 1991年 / 45卷 / 1-3期

关键词：

D O I：

10.1016/0257-8972(91)90251-Q

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A continuous wave, 2.5 kW CO2 laser was used to surface alloy AISI 1045 steel and alpha-Fe with CrB2 by the powder injection method. CrB2 particles (100-150-mu-m size) were injected into the molten bath of the substrate. The particles were partially dissolved in the bath, forming a melted layer of Fe-Cr-B-C. The solidification resulted in the formation of iron borides and undissolved CrB2 in the case of Armco iron and additional alpha-ferrite, gamma-austenite and chromium carbides in the SAE 1045 steel. The hardness was high, 1250 HV in both cases, caused mainly by the borides. The overlap of the laser passes did not affect the hardness distribution throughout the alloyed layer. The structure and properties of the layers were studied using X-ray diffraction, Auger electron spectroscopy, scanning electron microscopy and optical microscopy.

引用

页码：417 / 423

页数：7