55CrMo钢感应淬火工艺的数值模拟及工艺优化  

Technological parameters optimization and numerical simulation of induction hardening for 55Cr Mo steel

作　　者：贺连芳[1] 李辉平[1] 盖康 孔令亮[1] 崔洪芝[1] 李木森[2] 

机构地区：[1]山东科技大学材料科学与工程学院,山东青岛266590 [2]山东大学材料科学与工程学院,山东济南250061

出　　处：《材料热处理学报》2015年第1期199-204,共6页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(51175302);国家科技重大专项(2011ZX04014-031);教育部"新世纪优秀人才支持计划"(NCET-12-0342);山东科技大学人才引进科研启动基金(2013RCJJ002;2013RCJJ005)

摘　　要：借助工艺实验和数值模拟技术,优化了55Cr Mo钢精密滚珠丝杠感应加热及冷却工艺参数,改善了丝杠感应淬火后的淬硬层分布。构建了丝杠单感应圈加热的有限元模型,通过数值模拟得到了单感应圈加热时沟道区域的温度曲线。数值模拟结果表明:沟道区域的温度场分布不合理是导致淬硬层分布不合理的主要原因。针对单感应圈感应淬火工艺的不足,提出了双感应圈加热工艺。数值模拟结果表明,采用双感应圈加热工艺、喷水冷却带宽度为40 mm时,可保证丝杠沟道顶部的淬硬层深度约为6.2 mm,沟道底部的淬硬层深度约为3.0 mm。工艺实验结果表明,丝杠沟道区域的淬硬层分布得到较大的改善,数值模拟结果与工艺实验结果吻合得较好。In order to improve the hardness distribution of hardening layer in the precision ball screw of 55 Cr Mo steel after the induction hardening,the induction heating and cooling parameters of ball screw were researched using the experiment and numerical simulation methods. The finite element model of single-coil induction heating was built,and the temperature curves on the surface region of ball screw were attained using the numerical simulation method. The numerical simulation results show that,the unreasonable distribution of temperature field in the grove region of ball screw is the main reason resulting in the non-ideal hardness distribution of hardening layer.The double-coils induction heating of ball screw was presented to solve the problem in the single-coil induction heating. The numerical simulation results of double-coils induction heating show that,the depth of hardening layer on the surface region and the groove bottom is respectively about 6. 2 mm and 3. 0 mm when the width of water cooling coil is about 40 mm. The experiment results of double-coils induction heating show that,the hardness distribution of hardening layer in the ball screw is much improved,and the numerical simulation data is well consistent with the experiment data.

关 键 词：55CrMo钢 感应加热 淬火 滚珠丝杠 硬度 

分 类 号：TG161[金属学及工艺—热处理]