摘要
针对传统IN706和改进型IN706m合金开展了铸态显微组织观察分析并研究了其析出相回溶规律。经过研究发现,合金铸态组织中存在大量的γ+γ′共晶组织、η相、Laves相和M(C,N)。γ+γ′共晶组织、针状η相可在高于1100℃的保温过程中完全回溶到基体中。IN706合金中Laves相的初熔点在1160~1180℃之间,IN706m合金Laves相的初熔点在1140~1160℃之间。在实际生产中,选择1140℃保温8 h以上,即可使得Laves相完全回溶到基体中而不发生初熔,元素微观偏析也能得到有效地消除。
The as-cast microstructure of traditional IN706 and modified IN706 alloy was observed and analyzed,and the law of precipitated phase re-dissolution was studied.The results show that there are plenty ofγ+γ′eutectic structure,ηphases,Laves phases and M(C,N)in alloy as-cast structure.γ+γ′eutectic structure and needle-likeηphase could be completely re-dissolved into the matrix when the holding temperature is above 1100℃.For IN706 alloy,the incipient melting point of the Laves phase is 1160~1180℃.For the IN706m alloy,the incipient melting point of the Laves phase is 1140~1160℃.In actual production,choose 1140℃and hold for 8h,Laves phases could be completely re-dissolved into the matrix without incipient melting,and the element microsegregation can be eliminated effectively.
作者
张冰冰
白亚冠
聂义宏
张鑫
寇金凤
ZHANG Bingbing;BAI Yaguan;NIE Yihong;ZHANG Xin;KOU Jinfeng
出处
《大型铸锻件》
2024年第4期33-37,54,共6页
Heavy Casting and Forging
基金
黑龙江省自然科学基金杰出青年项目(JQ2021E007)。
