摘要
低温固体渗硼时,渗硼层通常呈梳齿状特征,整齐、致密、疏松孔洞少。但在渗硼剂中如添加过多的铵盐和硫脲作为复合催化剂时,容易出现所谓的“块粒状”组织,此组织中有较多的疏松孔洞和黑色组织。通过金相显微镜观察、电子探针分析和X射线衍射分析,研究了块粒状渗层组织。结果表明:此块粒状组织仍是硼化物层。通过耐磨试验和阳极极化曲线测试,研究了块粒状渗层性能。结果表明:梳齿状渗层的耐磨性优于块粒状渗层的耐磨性,而块粒状渗层的耐蚀性却优于梳齿状渗层的耐蚀性。
The borided layer of low temperature is usually tooth-like,and its structure is even.fine and close.short of porosity and black spots. Adding too much halogenide and thiacetazone into the boriding agent .lumpish or granuilar structure full of porosity and black spots is found. According to the results of microscope. EPMA and X ray diffraction,the lumpish or granular structure is still borided layer. The difference between tooth-like borided layer and lumpish or granular borided layer by means of wear comparision test and measurement of anode polarization is discussed. That is,wear resistance of tooth-like borided layer is superior to that of lumpish or grannular borided layer,but corrosion resistance of tooth-like borided layer is much inferior to that of lumpish or grannular borided layer. The simple explanation is expounded in the paper about it.
出处
《表面技术》
EI
CAS
CSCD
1999年第4期8-11,共4页
Surface Technology
关键词
性能
块粒状渗层
渗硼
耐蚀性
耐磨层
Structure Performance Lumpish or grannular borided layer
