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回火处理对 ZG04Cr13Ni4 马氏体不锈钢铸件组织 及性能的影响
Effect of Tempering Treatment on Microstructure and Properties of ZG04Cr13Ni4 Martensitic Stainless Steel Castings
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- DOI:
- 作者:
- 孙 兰 1 ，杨明川 2 ，蒋 繁 1 ，鲜 广 1 ，范洪远 1
SUN Lan 1 , YANG Mingchuan 2 , JIANG Fan 1 , XIAN Guang 1 , FAN Hongyuan 1
- 作者单位:
- 1. 四川大学 机械工程学院；2. 中建钢构工程有限公司
1. School of Mechanical Engineering, Sichuan University, 2.China Construction Steel Structure Engineering Co., Ltd.,
- 关键词:
- ZG04Cr13Ni4 ；马氏体不锈钢；回火温度；热处理；力学性能
04Cr13Ni4; martensitic stainless steel; tempering temperature; heat treatment; mechanical property
- 摘要:
- 以 800~1 000 MW 级水轮机转轮常用材料 ZG04Cr13Ni4 马氏体不锈钢为研究对象，分析了不同回火温度
和回火次数对材料显微组织及力学性能的影响。 结果表明： ZG04Cr13Ni4 马氏体不锈钢经过正火及一次回火或二次回
火处理后，其金相组织均为板条状马氏体，并具有明显的原奥氏体晶界；当二次回火温度进一步升高时，板条状马氏体
粗化，但仍保持马氏体板条位向及形貌；经正火及二次回火后材料综合力学性能显著提高；最佳热处理工艺为选择正火
及二次回火工艺，且回火温度控制在 600~640 ℃ 可以满足产品行业标准中力学性能要求。
The microstructure and mechanical properties of ZG04Cr13Ni4 martensitic stainless steel commonly used for
800-1000 MW water turbine runner were studied at different tempering temperatures and times. The results show that
the microstructure of ZG04Cr13Ni4 martensitic stainless steel after normalizing and primary or secondary tempering is
strip martensite and has obvious original austenite grain boundary. When the secondary tempering temperature increases
further, the lath martensite becomes coarser, but still retains the orientation and morphology of martensite lath. After
normalizing and secondary tempering, the comprehensive mechanical properties of the materials are significantly
improved. The best heat treatment process is normalizing and secondary tempering process, and the tempering
temperature is controlled between 600 ℃ and 640 ℃ , which can meet the mechanical properties requirements of
product industry standards.