大规格GCr15轴承钢连续炉球化退火工艺实践  

Large Size GCr15 Bearing Steel Continuous Annealing Furnace Technology Practice

作　　者：徐尚呈 周立新 张志成 李德胜 

机构地区：[1]大冶特殊钢股份有限公司产品研究所,湖北黄石435001

出　　处：《热加工工艺》2015年第10期207-209,共3页Hot Working Technology

基　　金：高品质特殊钢核心技术(863计划)(2012AA03A504)

摘　　要：通过对轴承钢球化退火转变机理的分析、研究,制定出理想的大规格轴承钢GCr15连续炉球化退火的生产工艺。结果表明,大规格轴承钢在连续炉球化退火时,选择等温球化退火工艺最为有效;退火炉保温区的温度分别制定为810、800℃,等温区的温度分别制定为735、730、720℃,辊速调整到1.5 m/h,准120 mm的GCr15轴承钢球化组织能达到2.2和3.0级。According to the transformation mechanism of spheroidizing annealing of bearing steel,a reasonable spheroidizing annealing process of large-size GCr15 bearing steels was selected in the continuous heat treatment furnace.The results show that the most effective spheroidizing annealing measure of the large-size bearing steels in the continuous heat treatment furnace is isothermal spheroidizing annealing process.The specific process parameters are as follows：the temperatures in heat preservation zone are 810 ℃ and 800 ℃,the temperatures in heat preservation zone are 735℃,730℃ and720℃,the roll speed is 1.5 m/h.In this isothermal spheroidizing annealing process,the microstructure of GCr15 bearing steels with 120 mm diameter can reach to 2.2 and 3.0 grade nodularization.

关 键 词：轴承钢GCr15 连续退火炉 球化退火 组织级别 

分 类 号：TG156.21[金属学及工艺—热处理]