HOE 400/250罩式炉等温球化退火对GCr15轴承钢硬度和组织的影响

特殊钢 ›› 2015, Vol. 36 ›› Issue (4): 59-62.

HOE 400/250罩式炉等温球化退火对GCr15轴承钢硬度和组织的影响

王莹莹¹,杨鹏远²2

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

收稿日期:2015-02-12 出版日期:2015-08-01 发布日期:2022-08-26
作者简介:王莹莹(1983-),女,工程师,2006年辽宁科技大学(本科)毕业，金属材料及热处理研究。

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

Wang Yingying¹ , Yang Pengyuan

1 Technical Department, Dalian High Alloy Wire and Rod Co Ltd, Dongbei Special Steel Group, Dalian 116105 ；
2 Dalian Special Steel Co Ltd, Dongbei Special Steel Group, Dalian 116105

Received:2015-02-12 Published:2015-08-01 Online:2022-08-26

摘要/Abstract

摘要： 对比分析了 GCr15轴承钢780 15-20°C/h炉冷至660°C的普通连续球化退火和780°C加热,30
°C/h冷却至720 °C 2 h再以20 °C/h炉冷至660 °C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。

Abstract: The hardness and structure of bearing steel GCr15 by normal continuous spheroidizing annealing at 780 °C with 15 -20 °C/h furnace cooling to 660 °C , and by isothermal spheroidizing annealing at 780 T with 30 °C/h cooling to 720 °C for 2 h then with 20 °C/h furnace cooling to 660 °C are compared and analyzed. Results show that at same annealing time condition, by using continuous annealing process the HB hardness value of steel CCr15 is 184 〜202 and the spheroidizing structure rating is 2. 0 〜3. 5, while by using isothermal spheroidizing annealing process the HB hardness value of steel GCr15 is 191 ~ 198 and the rating of spheroidizing structure is 2.0 ~ 2. 5 to get better effect.

Key words: Material Index HOE400/250 Bell Furnace, Bearing Steel GCr15, Continuous Annealing, Isothermal Spheroidizing Annealing, Structure, Hardness

王莹莹, 杨鹏远. HOE 400/250罩式炉等温球化退火对GCr15轴承钢硬度和组织的影响[J]. 特殊钢, 2015, 36(4): 59-62.

Wang Yingying , Yang Pengyuan. Effect of Isothermal Spheroidizing Annealing Process in HOE 400/250 Bell-Type Furnace on Hardness and Structure of Bearing Steel GCr15[J]. Special Steel, 2015, 36(4): 59-62.