退火对Inconel718合金氢脆特性的影响

稀有金属材料与工程, 2005, 34(6): 954-958.

退火对Inconel718合金氢脆特性的影响

刘六法 ^1, , 卢晨 ^2, , 翟春泉 ^3, , 丁文江 ^4, , ^5, , ^6,

1.上海交通大学,上海,200030

2.上海交通大学,上海,200030

3.上海交通大学,上海,200030

4.上海交通大学,上海,200030

5.Department of Manufacturing Science,Graduate School,Osaka University,Yamadaoka 2-1,Suita,Osaka 565-0871,Japan

6.Department of Manufacturing Science,Graduate School,Osaka University,Yamadaoka 2-1,Suita,Osaka 565-0871,Japan

关键词： Inconel718 , 热处理 , 退火 , 氢脆 , γ"

Effect of Annealing Conditions on Hydrogen Embrittlement of Inconel718

通过实施不同的退火热处理工艺,调整合金中强化相的析出状态,制备具有不同退火状态的几组拉伸试样.对每组试样在未充氢和充氢后按相同的条件进行拉伸试验,通过比较未充氢试样和充氢后试样的强度和塑性,评价氢对该组试样的脆化作用.通过比较不同组试样的脆化表现,考察退火状态对Inconel 718氢脆倾向的影响.试验结果表明,随着退火程度的加强,强化相体积分数减少,氢引起的塑性损失下降,即抗氢脆性能改善.该结果说明,强化相γ"和γ'对Inconel 718合金的氢脆有促进作用.因此,根据不同工业应用要求,在符合强度要求的前提下,可以通过热处理改善零件的抗氢脆性能.

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