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摘要：
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为解决GH710合金普通锻造时变形困难、组织性能不均匀的技术问题,开展了GH710合金等温锻造工艺研究。对等温锻造GH710合金变形性能、微观组织和力学性能进行了分析,结果表明,等温锻造工艺可有效改善GH710合金变形性能、细化晶粒组织、提高合金力学性能。GH710合金经1100℃变形量为50%和70%的等温锻造后,均具有良好的力学性能,特别是其持久性能得到大幅度提高,815℃缺口持久性能达到100 h之上,980℃光滑持久性能达到80 h之上。采用等温锻造工艺研制出了Φ240 mm的GH710合金涡轮盘模锻件,锻件外观完整、晶粒组织细小均匀,力学性能稳定,等温锻造工艺是制备GH710合金细晶涡轮盘的理想工艺。
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Superalloy GH710 is very difficult to be forged by conventional methods.It creates uneven micro-structure and physical properties,or even a cracked forging.In order to solve the problem,the isothermal forging processes were developed for superalloy GH710.The microstructure and mechanical properties of isothermal forged superalloy GH710 were studied.The results show that the fine grains and good mechanical properties can be achieved for GH710 by isothermal deformation.When superalloy GH710 is isothermal forged at 1100 ℃ with the reduction of 50%and 70%,it has excellent mechanical properties and the rupture life is increased obviously.For example,the notched stress-rupture life at 815 ℃ is more than 100 h and smooth stress-rupture life at 980 ℃ is more than 80 h.The investigated isothermal forging technology scheme can be used for developing GH710 turbine disc and the achieved isothermal forged GH710 disc exhibits satisfactory properties.
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作者简介：
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参考文献：
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[5]HB5423 89,航空用CH710合金饼坯锻件.
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