HOE400/250罩式炉等温球化退火对GCr15轴承钢硬度和组织的影响  

Effect of Isothermal Spheroidizing Annealing Process in HOE 400/250 Bell-Type Furnace on Hardness and Structure of Bearing Steel GCr15

作　　者：王莹莹 杨鹏远 

机构地区：[1]东北特钢集团大连高合金棒线材有限责任公司技术处,大连116105 [2]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4期59-62,共4页Special Steel

摘　　要：对比分析了GCr15轴承钢＇780℃15～20℃/h炉冷至660℃的普通连续球化退火和780℃加热,30℃/h冷却至720℃2 h再以20℃/h炉冷至660℃的等温球化退火后钢的硬度和组织。结果表明,在相同退火时间条件下,采用连续球化退火工艺GCr15钢的HB硬度值为184～202,球化组织级别为2.0～3.5,采用优化的等温球化退火工艺,GCr15钢HB硬度值为191～198,球化组织级别为2.0～2.5,取得较好的效果。The hardness and structure of beating steel GCrl5 by normal continuous spheroidizing annealing at 780 ℃ with 15 ～ 20℃/h furnace cooling to 660 ℃, and by isothermal spheroidizing annealing at 780 ℃ with 30 ℃/h cooling to 720 ℃ for 2 h then with 20 ℃/h furnace cooling to 660 ℃ are compared and analyzed. Results show that at same annea- ling time condition, by using continuous annealing process the HB hardness value of steel GCrl5 is 184 -202 and the sphe- roidizing structure rating is 2. 0 ～ 3.5, while by using isothermal spheroidizing annealing process the HB hardness value of steel GCrl5 is 191 - 198 and the rating of spheroidizing structure is 2.0 -2.5 to get better effect.

关 键 词：HOE 400/250罩式炉 GCR15轴承钢 连续退火 等温球化退火 组织 硬度 

分 类 号：TG161[金属学及工艺—热处理]