Abstract: The influence of treated time of standard treated process 980 ℃ 1 h solid solution-825 ℃ 2. 5 h stabilizing- 720 ℃ 8 h +620 ℃ 8 h aging on the structure and properties of IN706 alloy (/% ：0. 03C,41Ni,16Cr,l. 6Ti,2. 9Nb) is studied. The results show that with the increase of the solid solution treatment time (1 ~3 h) , the grain size of the alloy will be affected to a certain extent, thereby affecting the properties of the alloy； with the increase of the stabilizing treatment time (2. 5 ~5 h) , the precipitation of η increases, which leads to the reduction of strengthening phase forming elements, strength, plasticity and toughess of the alloy. Increasing the time of primary (8 ~18 h) and (8 ~36 h) secondary aging treatment will promote the precipitation of γ" and γ’ , and their morphology will also change, which will affect the properties of the alloy. But with solid solution for 1 ~3 h, stabilizing for 2. 5 ~5 h, primary aging for 8 ~18 h, secondary aging for 8 -36 h, the alloy mechanical properties all meet requirement of standard.

Key words:  , IN706 Alloy, Heat Treatment, Microstructure, Mechanical Properties

摘要： 研究了增加标准的980℃1h固溶-825℃ 2.5 h稳定化-720℃8 h+620℃8 h时效的处理时间对IN706合金(/%:0.03C,41Ni,16Cr,1.6Ti,2.9Nb)组织和性能的影响。结果表明,固溶处理时间(1～3 h)的增加,主要影响合金的晶粒尺寸,从而影响合金的性能;随稳定化处理时间(2.5～5 h)的增加,η相析出增多,导致强化相形成元素减少,合金性能亦有所下降,并对合金塑性和韧性产生不良影响;增加一级(8～18 h)和二级(8～36 h)时效处理的时间,会促进γ"和γ’相的析出,并且其形态也会发生变化,进而对合金的性能产生影响,但固溶1～3 h,稳定化2.5～5 h,以及一级时效8～18 h,二级时效8～36 h时合金的力学性能指标均满足标准要求。