热处理工艺对34CrNiMo6钢性能的影响研究  

Effects of Heat Treatment on Performance of 34CrNiMo6 Steel

作　　者：侯政良 王柱飞 张雪冬 郭巨寿 康凤[2] HOU Zheng-liang;WANG Zhu-fei;ZHANG Xue-dong;GUO Ju-shou;KANG Feng(Northem General Dynamics Group Company, Datong 037036, China;Southwest Technology and Engineering Institute, Chongqing 400039, China)

机构地区：[1]北方通用动力集团有限公司,山西大同037036 [2]西南技术工程研究所,重庆400039

出　　处：《精密成形工程》2018年第6期38-42,共5页Journal of Netshape Forming Engineering

基　　金：总装预研基金(41423040323)

摘　　要：目的提高34CrNiMo6钢构件抗拉强度、屈服强度以及伸长率的匹配程度,进而提高合金的冲击韧性和疲劳性能。方法通过热处理试验,研究不同工艺对材料组织和性能的影响。采用预先热处理(正火+高温回火)→调质热处理(淬火+回火)的工艺,研究不同淬火和回火温度对试样组织及力学性能的影响。结果随着淬火温度的升高,试样的强度有所增加,伸长率差别不大,在淬火温度为900℃时冲击韧性有所下降。随着回火温度的升高,强度明显降低,但伸长率逐渐升高,冲击韧性则稍有提升。结论通过试验确定了材料的热处理工艺:850℃淬火+580℃回火。在该调质工艺下,材料的强度和塑性得到了合理的匹配。The paper aims to improve the matching of tensile strength, yield strength and elongation of 34 CrNiMo6 steel, and improve the impact toughness and fatigue properties of alloy. Heat treatment test was carried out to research effects of different processes on microstructure and mechanical properties of samples. Pre-heat treatment(normalizing and high-temperature tempering) + quenched-tempered heat treatment(hardening and tempering) were used to study effects of different quenching and tempering temperature on microstructure and mechanical properties of samples. With the increase of quenching temperature, the strength of the sample increased, but there was little difference in the variation of elongation. The impact toughness decreased at 900 ℃. As the tempering temperature risen, the strength decreased obviously, but the elongation increased gradually and the impact toughness increased slightly. Through the test, the heat treatment process of materials was determined to be quenched at 850 ℃and tempered at 580 ℃. With this tempering process, the strength and plasticity of the material were properly matched.

关 键 词：热处理 结构钢 组织 性能 工艺 

分 类 号：TG142.1[一般工业技术—材料科学与工程]