摘要
研究了 CrMnB堆焊合金的抗空蚀和冲刷磨损性能.结果表明:该堆焊合金的抗空蚀和冲刷磨损性能优于0Cr13Ni5Mo马氏体不锈钢,其原因是具有亚稳奥氏体和硼化物共晶组织的 CrMnB堆焊合金,在冲击力的作用下,亚稳奥氏体相转变成了马氏体,提高了堆焊合金表面的硬度和强度并吸收了冲击能.同时沿奥氏体边界分布的高硬度的硼化物共晶组织,构成了耐磨“骨架”.
The cavitation erosion and erosive wear resistance of CrMnB overlayers were investigated. The results showed that the cavitation erosion and erosive wear resistance of CrMnB overlayers were better than that of 0Cr(13)Ni(5)Mo stainless steel. The microstructures of CrMnB overlayers consists of metastable austenite and boride eutectic. The high cavitation erosion and erosive wear resistance of CrMnB overlayers were attributed to the strain induced austenite to martensite transformation under repetitive cyclic impact load. This phase transformation absorbed the energy produced by impact load and increased the hardness and strength of the surface layer of CrMnB surfacing alloy. Meanwhile, a mount of boride eutectic structures along the austenite boundaries formed the 'skeletons' for wear resistance.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2002年第9期936-940,共5页
Acta Metallurgica Sinica
基金
国家自然科学基金 59831030
国家重点基础研究发展规划G19990650资助项目
