ML45CrMo钢16.8级螺栓的等温淬火工艺

doi:10.13251/j.issn.0254-6051.2024.05.039

金属热处理 ›› 2024, Vol. 49 ›› Issue (5): 231-233.DOI: 10.13251/j.issn.0254-6051.2024.05.039

ML45CrMo钢16.8级螺栓的等温淬火工艺

唐建良, 蒋杨英, 闫洪军

舟山市7412工厂, 浙江舟山 316041

收稿日期:2023-11-01 修回日期:2024-03-15 出版日期:2024-05-25 发布日期:2024-06-28
作者简介:唐建良(1966—),男,高级工程师,主要研究方向为超高强度紧固件、高温合金紧固件等金属材料的热处理工艺,E-mail:tangjianliang@hj7412.com。

Austempering of ML45CrMo steel for grade 16.8 bolt

Tang Jianliang, Jiang Yangying, Yan Hongjun

Zhoushan 7412 Factory, Zhoushan Zhejiang 316041, China

Received:2023-11-01 Revised:2024-03-15 Online:2024-05-25 Published:2024-06-28

摘要/Abstract

摘要： 采用国产ML45CrMo钢进行等温淬火处理试验。试样在SY805-5网带炉中加热保温,然后放入硝盐等温槽中等温淬火,通过维氏硬度计、万能试验机、金相显微镜等手段对等温淬火试样的力学性能和显微组织进行了测试及观察。结果表明,ML45CrMo钢通过贝氏体等温淬火工艺:淬火加热温度850 ℃,保温80 min,在硝盐中等温淬火,硝盐温度(320±10) ℃,等温时间60 min,达到了16.8级螺栓的性能要求。

关键词: ML45CrMo钢, 贝氏体等温淬火, 16.8级螺栓

Abstract: Domestic ML45CrMo steel was conducted austempering treatment tests. The specimens were heated and held in a SY805-5 mesh belt furnace, and then placed in a nitrate salt bath for austempering. The mechanical properties and microstructure of the austempered specimens were tested and observed by means of Vickers hardness tester, universal testing machine and metallographic microscope. The results show that after bainitic austempering, i.e. quenching at 850 ℃ for 80 min, austempering in nitrate at temperature of (320±10) ℃, holding for 60 min in nitrate, the ML45CrMo steel meets the property requirements of grade 16.8 bolts.

Key words: ML45CrMo steel, bainitic austempering, grade 16.8 bolt

中图分类号:

TG156.3

唐建良, 蒋杨英, 闫洪军. ML45CrMo钢16.8级螺栓的等温淬火工艺[J]. 金属热处理, 2024, 49(5): 231-233.

Tang Jianliang, Jiang Yangying, Yan Hongjun. Austempering of ML45CrMo steel for grade 16.8 bolt[J]. Heat Treatment of Metals, 2024, 49(5): 231-233.

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ML45CrMo钢16.8级螺栓的等温淬火工艺

Austempering of ML45CrMo steel for grade 16.8 bolt

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