调质工艺及夹杂物对150 KSI级深井用钢组织和性能的影响

doi:10.13251/j.issn.0254-6051.2025.04.034

摘要/Abstract

摘要： 采用光学显微镜、扫描电镜、ASPEX扫描分析仪、拉伸试验、冲击试验等研究了回火温度、时间和夹杂物对150 KSI级30CrNi2MoV深井用钢调质处理后的显微组织和力学性能的影响。结果表明,在860 ℃淬火+590~610 ℃回火60 min时,随回火温度的升高,30CrNi2MoV钢的屈服强度由1152 MPa下降至1058 MPa,抗拉强度由1239 MPa下降至1135 MPa,断后伸长率由17%提升至19%,断面收缩率由56%提升至61%,常温冲击吸收能量最低值由80 J提升至99 J。在600 ℃回火60~240 min时,随着回火时间的延长,晶内析出物增多。在600 ℃回火60 min条件下,夹杂物指数由12.8降低至1.1时,试验钢的冲击吸收能量平均值由57 J提高至95 J。

关键词: 30CrNi2MoV深井用钢, 回火工艺, 显微组织, 力学性能, 夹杂物

Abstract: Effects of tempering temperature, time and inclusion on microstructure and mechanical properties of 150 KSI 30CrNi2MoV steel for deep wells were studied by means of optical microscope, scanning electron microscope, ASPEX scanning analyzer, tensile test and impact test. The results show that after quenching at 860 ℃ and tempering at 590-610 ℃ for 60 min, the yield strength of the 30CrNi2MoV steel decreases from 1152 MPa to 1058 MPa with the increase of tempering temperature, the tensile strength decreases from 1239 MPa to 1135 MPa, the elongation increases from 17% to 19%, the percentage reduction of area increases from 56% to 61%, and the normal temperature minimum impact absorbed energy increases from 80 J to 99 J. When tempered at 600 ℃ for 60-240 min, the precipitates inside the grains increase with the increase of tempering time. When tempered at 600 ℃ for 60 min, with the inclusion index decreases from 12.8 to 1.1, the mean impact absorbed energy of the tested steel increases from 57 J to 95 J.

Key words: 30CrNi2MoV steel for deep wells, tempering process, microstructure, mechanical properties, inclusions

中图分类号:

TG142.1

胡瑞海, 倪燕红, 李博鹏, 曾云, 郑锦锋. 调质工艺及夹杂物对150 KSI级深井用钢组织和性能的影响[J]. 金属热处理, 2025, 50(4): 227-230.

Hu Ruihai, Ni Yanhong, Li Bopeng, Zeng Yun, Zheng Jinfeng. Effect of quenching and tempering process and inclusion on microstructure and properties of 150 KSI grade deep well steel[J]. Heat Treatment of Metals, 2025, 50(4): 227-230.

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