GCr15轴承钢线材冷拔工艺优化的实践  

Practice of Cold Drawing Process Optimization of GCr15 Bearing Steel Rod

作　　者：王莹莹 杨鹏远 

机构地区：[1]东北特钢集团大连特殊钢有限责任公司,大连116105

出　　处：《特殊钢》2015年第6期16-19,共4页Special Steel

摘　　要：分析了GCr15轴承钢(1.01%C,1.58%Cr)Φ11 mm线材的减面率、拉拔模角度和定径带长度,拉拔速率对拉拔应力和拉拔表面精度的影响。得出Φ11 mm盘条冷拉至Φ10.2 mm线材的优化工艺,即Φ11 mm线材(HB193)-等温球化退火(785℃4.5 h→750℃3 h)-冷拔至中10.4 mm盘条-740℃4.5 h去应力退火-冷拔至Φ10.2 mm棒材成品(HB205);冷拔速度35 m/min,油性润滑等工艺措施可获良好的表面质量。The effect of draft, cone angle and length of sizing belt of drawing die, and drawing speed on drawing stress and drawing surface accuracy of bearing steel GCr15 （1. 01% C, 1.58% Cr） Ф11 mm rod coil has been analyzed. The optimization process for Ф11 mm rod coil cold drawing to Ф10. 2 mm rod is obtained, i.e. Ф11 mm rod coil （HB193）- isothermal spheroidizing annealing （at 785 ℃ for4. 5 h→ at 750 ℃ for 3 h）- cold drawing to 10. 4 mm rod- de-stress annealing at 740 ℃ for 4. 5 h- cold drawing to Ф10. 2 mm rod products （HB205） ; the nice surface quality is ob- tained by using the process measures including with cold speed 35 m/mitt and drawing oil lubricant.

关 键 词：GCr15轴承钢线材 联合拉拔机 冷拔 减面率 模具 应力 等温球化退火 润滑 

分 类 号：TG356.4[金属学及工艺—金属压力加工]