中国机械工程 ›› 2015, Vol. 26 ›› Issue (1): 92-97.

• 机械基础工程 • 上一篇    下一篇

汽轮机转子锻件高温扩散退火工艺的试验研究

刘鑫刚1;陈欢1;金淼1;王玉辉2;张清华3   

  1. 1.先进锻压成形技术与科学教育部重点实验室(燕山大学),秦皇岛,066004
    2.燕山大学国家冷轧板带装备及工艺工程技术研究中心,秦皇岛,066004
    3.中国第二重型机械集团公司,德阳,618000
  • 出版日期:2015-01-10 发布日期:2015-01-15
  • 基金资助:
    国家自然科学基金资助项目(51005198);河北省高等学校科学技术研究优秀青年基金资助项目(Y2012034)

Experimental Research on High-temperature Diffusion Annealing Process of Steam Turbine Rotor Forgings

Liu Xingang1;Chen Huan1;Jin Miao1;Wang Yuhui2;Zhang Qinghua3   

  1. 1.Key Laboratory of Advanced Forging & Stamping Technology and Science (Yanshan University),Ministry of Education of China,Qinhuangdao,Hebei,066004
    2.National Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Yanshan University,Qinhuangdao, Hebei,066004
    3.China National Erzhong Group Co.,Deyang,Sichuan,618000
  • Online:2015-01-10 Published:2015-01-15
  • Supported by:
    National Natural Science Foundation of China(No. 51005198)

摘要:

基于试验方法,结合高中压汽轮机转子锻件实际生产工艺,研究了不同保温时间、锻造火次处理后晶粒尺寸、组织、力学性能的变化规律,揭示了高温扩散退火对30Cr1Mo1V钢的影响。试验结果表明:高温扩散退火可消除因枝晶偏析与锻造变形产生的条带组织;只在锻前进行高温扩散退火,试样晶粒尺寸较小,且扩散的均质化作用提高了30Cr1Mo1V钢的横向韧性;锻后长时间高温加热将导致晶粒过大、组织粗化,大大降低了韧性;高温扩散退火对30Cr1Mo1V钢塑性无显著影响。

关键词: 30Cr1Mo1V, 高温扩散退火, 组织, 力学性能

Abstract:

Based on experiments, combined with the practical production of high pressure steam turbine rotor forgings, the variation of grain size, microstructure and mechanical properties in different holding times and forging fire times were studied, the influences of high-temperature diffusion annealing on 30Cr1Mo1V steel were revealed as well. The results show that the banded structure produced by dendritic segregation and forging deformation can be eliminated by high-temperature diffusion annealing. The grain size is smaller only before forging high-temperature diffusion annealing. The transverse toughness of the 30Cr1Mo1V steel can also be improved by homogenization. The grain and the structure are coarsened because of long time high temperature heating after forging, which leads to the worse toughness of the steel. Meanwhile, the plasticity of 30Cr1Mo1V steel is not influenced by the high-temperature diffusion annealing obviously.

Key words: 30Cr1Mo1V, high-temperature diffusion annealing, microstructure, mechanical property

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