Effect of Co additive on high temperature property of hardfacing alloy

LONG Weimin; LIU Dashuang; FU Yucan; WU Mingfang; JIA Lianhui

doi:10.7512/j.issn.1001-2303.2020.09.02

Views : 0 下载量: 676 CSCD: 0

PDF
Export
Share
Collection
Album

Effect of Co additive on high temperature property of hardfacing alloy
Vol. 50, Issue 9, Pages: 11-16(2020)
Published：2020
DOI： 10.7512/j.issn.1001-2303.2020.09.02
稿件说明：

移动端阅览

DOI：

LONG Weimin, LIU Dashuang, FU Yucan, et al. Effect of Co additive on high temperature property of hardfacing alloy[J]. Eletric Welding Machine2020, 50(9): 11-16. DOI： 10.7512/j.issn.1001-2303.2020.09.02.

摘要

通过药芯焊丝电弧堆焊的方法制备出不同Co添加量的多元碳化物复合熔覆层

该熔覆层相组成为M

（C

B）

、M

（C

B）碳化物、马氏体及少量残余奥氏体（M=Cr、Fe、Mn、Co等）

且随着Co添加量的增加

组织中奥氏体枝晶数量增加

尺寸亦有所增大。多元碳化物复合熔覆层经高温回火（600℃×4 h）后

初生M

（C

B）

碳化物及共晶M

（C

B）碳化物均未发现明显变化

而奥氏体颜色变为灰黑

随着Co添加量的增加

多元碳化物复合熔覆层的高温回火稳定性逐渐增加。此外

当Co添加量为6%时

多元碳化物复合熔覆层的高温耐磨性最佳

这与该多元复合熔覆层在高温下仍具有最高的硬度及良好的高温回火稳定性密切相关。

Abstract

The multi carbide composite cladding layers with different Co contents were prepared by fluxcored wire arc welding. The microstructure of the cladding layer was composed of M7（C

B）3

M3（C

B） carbide

martensite and a small amount of retained austenite（M = Cr

etc.）. With the increase of Co content

the amount and size of austenite dendrite was increased. After high temperature tempering（600 ℃× 4 h）

the primary M7（C

B）3 carbides and eutectic M3（C

B） carbides didn’t change obviously

but the color austenite turned gray black

which indicated that austenite was oxidized. Moreover

the high temperature tempering stability of multi carbide composite cladding layer was increased gradually. In addition

when the Co content is 6%

the best high temperature wear resistance of the multi-component carbide composite cladding layer was closely related to the highest hardness and good high-temperature tempering stability of the multi-component composite cladding layer.