石油钻井25MnV钢套管调质工艺的改进
Improvement of Hardening and Tempering for 25MnV Steel Oil Casing
唐明华1, 胡双开2, 刘志义3
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作者单位:(1. 湖南工学院 机械工程系, 湖南 衡阳 421002; 2.衡阳华菱钢管有限公司 质量管理部, 湖南 衡阳 421001; 3.中南大学 材料科学与工程学院, 湖南 长沙 410083)
中文关键字:25MnV钢; 亚温淬火; 性能
英文关键字:25MnV steel; subcritical quenching; properties
中文摘要:针对25MnV钢石油套管调质处理后冲击韧度不稳定的问题,进行了改进的亚温淬火工艺试验。结果表明,与常规调质处理相比,亚温淬火后的25MnV钢可得到板条马氏体之间分布有条状铁素体的复相组织,在不降低强度的前提下,明显提高冲击韧度,抑制高温回火脆性。
英文摘要:According to the problem of low toughness and the instability of 25MnV steel oil casing treated by quenching and tempering, the subcritical quenching test was studied. The results show that compared with the conventional heat treatment, 25MnV steel treated by subcritical quenching can receive a duplex microstructure of strip ferrite distributed between martensite laths and can significantly improve the impact toughness, inhibition of high temperature brittleness without reducing the strength of the premise.