摘要
在Q235A基体上采用药芯焊丝埋弧焊和自保护明弧焊方式依次堆焊了20Cr2Mn12Ni Mo N塑性缓冲层+含外加Ti C颗粒的耐磨层的堆焊合金,并与无缓冲层的堆焊合金进行分析比较。试验结果表明,增加塑性缓冲层一方面可降低耐磨层成分稀释影响,有利于耐磨合金层组织保持稳定;另一方面有效降低堆焊合金层的硬度梯度,使之避免残余应力集中而导致过早失效。
20Cr2Mn12NiMoN plastic buffer layer and wear-resisting layer of Ti C particles of the hardfacing alloys were surfaced in turn by the method of flux-cored wire submerged arc welding and self-shielded open arc welding on Q235 base metals,and compared with no buffer layer of alloy surfacing. The results showed that on one hand wear-resisting layer composition dilution effect could be reduced and the resistant alloy layer of tissue can be remained stable by increasing the plastic buffer layer;on the other hand,the hardfacing alloys layer of hardness gradient could be effectively reduced,and it refrained from premature failure due to residual stress concentration.
出处
《电焊机》
2015年第4期108-111,共4页
Electric Welding Machine
基金
湖南省自然科学湘潭联合基金资助项目(11JJ9015)
关键词
堆焊
缓冲层
组织
界面
药芯焊丝
hardfacing
buffer layer
microstructure
interface
flux-cored wire
