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GH901合金台阶轴表面裂纹原因探析及工艺优化 被引量:3

Analysis of Surface Cracking on Stepped Shaft of GH901 Alloy and It's Process Optimization
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摘要 GH901合金是Fe-Ni-Cr基沉淀硬化型变形高温合金,合金以亚稳的面心立方γ′[Ni3(Al,Ti)]相进行时效强化,微量的铝抑制γ′向η-Ni3Ti相转化,由于合金组织、性能对热加工参数比较敏感,以及特殊锻件对金属流线的特殊要求,锻造、热处理工艺等参数选择不当,容易产生锻件裂纹及探伤缺陷等质量问题。本文对GH901台阶轴裂纹的宏观产生过程、微观金相及扫描电镜结果进行综合分析,找到裂纹形成的原因,并通过得出试验结果,提出工艺改进措施,最终生产出合格的台阶轴产品,同时优化后的工艺对多种高温合金台阶轴的生产具有指导意义。 GH901 alloy is a kind of precipitation hardening Fe-Ni-Cr-based high-temperature alloys, which are age hardened by a metastable fcc phases, γ [Ni3 (Al, Ti)]. In the steel, traces of aluminum inhibit the transformation of γ phase to η-Ni3Ti. Since the alloy microstructure, properties are sensitive to hot working parameters, and special forgings has special requirements for the metal flow lines, improper forging or heat treatment process parameters most likely result in quality problems, such as cracking and defects. In this paper, the formation process of macroscopic crack metallographic structure ant SEM results of GH901 stepped shaft were analyzed comprehensively, the reasons for cracking found out, and the improving measures pointed out, so products for stepped shaft could meet the relevant requirements, which provide guidance for the production of a variety of high temperature alloys stepped shaft.
作者 周江波
出处 《特钢技术》 CAS 2015年第1期21-23,28,共4页 Special Steel Technology
关键词 台阶轴 热处理工艺 裂纹 Stepped shaft, Heat treatment process, Cracks
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参考文献2

  • 1张继、孙晓峰、李嘉荣、董建新.《中国高温合金手册》上卷[M].北京:中国标准出版社,2012年.458页.
  • 2袁超,杨洪才,刘世贵.MonelK-500合金的时效开裂倾向[J].东北大学学报(自然科学版),1994,15(2):180-183. 被引量:5

二级参考文献1

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