Inconel 718合金精密杆螺栓光杆尺寸变小的原因分析

Analysis of Reduced Dimension for Inconel 718 Alloy Precision Bolt Shank

摘要: 本文分析了Inconel 718合金精密杆螺栓光杆尺寸变小的原因是时效热处理发生固态相变所致，同时举一反三，研究了时效对Inconel 718等四种高温合金尺寸的影响规律。结果表明，时效热处理发生固态相变导致Inconel 718高温合金精密杆尺寸变小，Inconel 718、Rene’41、Waspaloy和A286合金的尺寸经时效后均有所减小，减小量均与时效前尺寸成正比。在时效前预留一定的尺寸余量，可有效解决应力持久型高温合金精密杆螺栓光杆尺寸偏小的问题。

Abstract: This article analyzes the reasons for the Inconel 718 alloy precision bolt shank reduced dimension of solid-state phase transformation during the aging treatment. From this, we also studied the in-fluence of aging on dimension for four superalloys, including Inconel 718, Rene’41, Waspaloy and A286 alloy. Result shows that dimensions of the four kinds of alloys are all reduced after aging treatment, and the reduction is proportional to the dimension before aging. Therefore, we can re-serve some allowance for dimension before aging to solve the problem of reduced dimension for stress-type superalloy precision bolts.