热处理工艺对23CrNi3Mo钎具钢组织及性能的影响  

Influence of heat treatment process on microstructure and properties of 23CrNi3Mo steel

作　　者：闫永明[1] 刘雅政[1] 周乐育[1] 徐盛[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083

出　　处：《材料热处理学报》2014年第2期110-115,共6页Transactions of Materials and Heat Treatment

摘　　要：为提高钎具的使用寿命,采用SEM、TEM等方法对一种较为理想的凿岩钻具及钎具用钢23CrNi3Mo的热处理工艺进行了研究。利用正交试验极差分析的方法分析了热处理工艺参数对23CrNi3Mo钢组织和性能的影响。结果表明:热处理工艺参数对强度的影响不大,而对塑性有较明显的影响。23CrNi3Mo钎具钢的最佳热处理工艺为:(920℃×45 min)油淬+(200℃×2 h)回火,回火保温完成后,空冷至室温。显微组织中存在碳化物会对冲击韧性造成不良影响,因此热处理后应避免碳化物的出现,淬火保温时间应≥45 min,回火温度应≤200℃。In order to improve the quality of drill, different heat treatment processes of a 23CrNi3Mo drill steet were conducted, and the influence of heat treatment parameters on mierostrueture and mechanical properties of the 23CrNi3Mo drill steel was studied by means of SEM, TEM, tensile test and impact test using orthogonal experiments. The heat treatment process was optimized based on the investigation. The results show that the optimum heat treatment process is quenching at 920 ℃ for 45 min in oil and tempering at 200 ℃ for 120 rain and then cooling in air for the 23CrNi3Mo drill steel. The carbide may have an adverse impact on impact toughness. In the process of heat treatment, the precipitation of carbide should be avoided. So the holding time of 45 rain and longer for quenching is recommended with the tempering temperature at or lower than 200 ℃.

关 键 词：23CrNi3Mo 正交实验 碳化物 冲击韧性 

分 类 号：TG142.1[一般工业技术—材料科学与工程]