热处理工艺对新型低温油井管用钢组织和性能的影响Effect of heat treatment on microstructure and mechanical properties of new low-temperature oil well steel
易善伟,历长云,胡小强,刘宏伟,郑雷刚,米国发,许敬月,秦卓,赵子文
摘要(Abstract):
借助光学显微镜、扫描电镜、拉伸试验机等研究了热处理工艺对自主设计的新型高强、高韧、无Ni低温油井管用钢(简称IMR-LS10钢)组织和性能的影响。结果表明:在800~880℃淬火时,随着淬火温度的升高,IMR-LS10钢的平均晶粒尺寸先增大后减小,经650℃回火后的抗拉强度逐渐增大,-45℃低温冲击吸收能量先增大再减小,840℃淬火时达到峰值38.6 J;在880~1000℃淬火时,随着淬火温度的增加,IMR-LS10钢的晶粒尺寸逐渐增大,经650℃回火后的抗拉强度先减小再增大,低温冲击吸收能量逐渐增大;经880℃淬火+200~750℃回火后IMR-LS10钢抗拉强度逐渐降低;回火温度低于500℃时,IMR-LS10钢的低温冲击吸收能量缓慢增加,当回火温度达到550℃时,低温冲击吸收能量达到峰值32.98 J,随后,低温冲击吸收能量出现降低趋势,并在650℃时出现最小值;IMR-LS10钢的最佳调质热处理工艺方案为880℃淬火+550℃回火。
关键词(KeyWords): 油井管;淬火温度;回火温度;抗拉强度;冲击吸收能量
基金项目(Foundation): 国家自然科学基金(U1508215);; 甘肃省科技攻关计划(2015GS05896);; 辽宁省科技创新重大专项(201410003)
作者(Author): 易善伟,历长云,胡小强,刘宏伟,郑雷刚,米国发,许敬月,秦卓,赵子文
DOI: 10.13289/j.issn.1009-6264.2017-0036
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