ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2021, Vol. 42 ›› Issue (5): 21-25.

所属专题: 高温合金开发

• 试验研究 • 上一篇    下一篇

GH4169合金δ相析出与溶解行为研究

白亚冠1李红梅1韩秀栋2聂义宏3寇金凤1   

  1. 1. 天津重型装备工程研究有限公司,天津 300457 ;
    2. 天津市科学技术发展战略研究院,天津 300011 ;
    3. 中国第一重型机械股份公司,齐齐哈尔 161042
  • 收稿日期:2021-03-20 出版日期:2021-10-01 发布日期:2022-12-12
  • 作者简介:白亚冠(1987-),男,硕士(2011年哈尔滨工业大学),高级工程师,2009年哈尔滨工业大学(本科)毕业,大型镍基合金及奥氏体不锈钢锻件研制。
  • 基金资助:
    天津市重点研发计划科技支撑重点项目 (18YFZCGX00220)

Study on Precipitation and Dissolution Behavior of δ Phase in GH4169 Alloy

Bai Yaguan1,Li Hongmei1, Han Xiudong2, Nie Yihong3 , Kou Jinfeng1   

  1. 1. Tianjin Heavy Industries Research & Development Co Ltd, Tianjin 300457;
    2. Tianjin Academy of Science and Technology for Development, Tianjin 300011;
    3. China First Heavy Industries Machinery Co.,Ltd., Qiqihaer 161042;
  • Received:2021-03-20 Published:2021-10-01 Online:2022-12-12

摘要: 研究了1050 °C 1 h固溶处理的GH4I69合金在800~980°C时效处理过程中δ相的析出行为以及900 °C 20 h预析出处理后的合金在980 ~ 1040°C固溶处理时的δ相溶解规律。研究表明,δ相的析出峰温度约为900°C ,δ相优先在晶界或率晶界析出,δ相由颗粒状长大成短棒状乃至长针状,晶内δ相由γ" 相转化而来。δ相长大方 式与温度存在关系。δ相在不低于980 T的固溶处理过程中优先从δ相的交界处溶解断开,并由长针状转变为短棒 状和颗粒状。晶界长针状δ相会更快的溶解,形成短棒状或颗粒状。≥ 1020 °C固溶处理可使得δ相完全溶解。

关键词: GH4169合金, δ相, 析岀, 溶解

Abstract: The precipitation behavior of δ phase of 1 050 °C 1 h solution-treated GH4169 alloy aging treated at 800 ~980 °C and the dissolution rule of δ phase in alloy after 900 °C 20 h pre-precipitation treatment alloy solution-treating at 980 ~ 1 040 °C are studied. The results indicate that the peak temperature of δ phase precipitation occurred at approximately 900 °C. δ phase precipitates in grain boundary and twin boundary first, and δ phase transforms from granular to short rod and even needle. Intragranular δ phase transforms from γ" phase. Growing up mechanism of δ phase is influenced by temperature. δ phase dissolves during no less than 980 °C solution treated from δ phase boundaries first, and then transforms from needle to short rod and granular. Needle-δ phase in grain boundary dissolves faster, and transforms to short rod or granular. The δ phase shall be completely dissolves by solution-treated at ≥1 020 °C.