摘要
对45钢进行了单元渗硼与硼稀土共渗，观察了渗硼层的组织、厚度，测试了各渗硼样品显微硬度、耐磨性和耐蚀性等性能。结果表明，加入稀土元素以后，渗硼层基本为单相的Fe2B，硼针变长，取向明显。在950℃×5h渗硼条件下，稀土氧化物质量分数在8％～9％时，渗层厚度最大。质量分数为9％稀土．硼共渗可以提高硼原子的渗入深度约1．5倍。与单元渗硼样品相比，硼稀土共渗样品具有较高的硬度、耐磨性能和耐酸、碱、盐腐蚀性能。
The microstructure, thickness, microhardness, wear resistance and corrosion resistance of single-borided and RE-borided layers of 45 steel were investigated respectively. The results show that the RE-borided layer of the steel is single phase Fe2B with well-orientated longer boron needle. Under the condition of boriding at 950℃ for 5 h, the optimal mass fraction of rare earth elements to the thickest borided layer is 8% - 9%. The 9% RE-borided layer is about 2. 5 times thickness as the single-borided layer. Compared with single-borided layer, the RE-borided layer possess higher hardness, better wear resistance and corrosion resistance in acid, alkali and salt solutions, respectively.
出处
《金属热处理》
CAS
CSCD
北大核心
2007年第4期43-46,共4页
Heat Treatment of Metals
基金
国家"十五"863攻关项目(2003AA305620)
关键词
稀土
固体渗硼
渗硼层
性能
rare earth
powder boriding
boride layer
properties
