铈及其碳化物对钢力学性能的影响  

Influences of Cerium and Its Carbide on Mechanical Properties of Steels

作　　者：张金柱[1] 李代钟[2] 

机构地区：[1]贵州工业大学冶金工程系,贵州贵阳550003 [2]中国科学院金属研究所,辽宁沈阳110015

出　　处：《中国稀土学报》2000年第3期275-277,共3页Journal of the Chinese Society of Rare Earths

基　　金：贵州省自然科学基金!( 1 99730 87)

摘　　要：通过金相、扫描电镜能谱分析和冲击、拉伸等实验方法 ,研究了钢中铈及其碳化物对强度、塑性、冲击韧度等力学性能的影响。固溶于钢中的微量铈有抑制奥氏体晶粒粗化的作用 ,至少可使奥氏体晶粒粗化温度提高 50K以上 ;如果铈在晶界上过量富集 ,可显著降低钢的冲击韧度。钢中的铈碳化物对钢的韧性和塑性都有改善作用 ,对钢的屈服点没有发现显著的影响。The influences of cerium and its carbide on the strength, plasticity, impact toughness and other mechanical properties of steels were investigated through experiments and tests. The results show that the cerium as solid solute in steel can inhibit the austenite grain growth and enhance the grain coarsening temperature by 50 K at least. If there was too much cerium segregated on the grain boundaries, it will considerably decrease the impact toughness of the steels. The cerium carbide can obviously improve the plasticity and toughness of steels, but do not make noticeable effects on the yield strength of steels.

关 键 词：稀土 铈碳化物 晶粒度 力学性 钢 稀有金属合金 

分 类 号：TG142.12[一般工业技术—材料科学与工程] TG146.4[金属学及工艺—金属材料]