GH33A合金的特殊直接时效工艺研究

A Specific Direct Ageing Treatment Research for GH33A

本文介绍了一种适用于沉淀强化型高温合金的特殊DA处理工艺。结果表明,这种工艺能够大幅度地提高GH33A合金的屈服强度和拉伸强度,使中等强度的GH33A合金的强度基本达到GH169合金的强度水平。由于采用预先固溶处理,可使GH33A合金在较高的锻造温度下获得满意的强化效果,从而可以克服通常的DA处理工艺由于锻造温度低带来的某些缺点。

A specific direct ageing treatment technique used for precipitation hardened nickel-base superalloys isintroduced in This paper.this technique can greatly increase the yield strength and tensile strength of nickelbase superalloy GH33A.The result demonstrates that the specific direct ageing treated GH33A has highstrength approaching the strength levle of Inconel718.Because of adding pre-solution treatment,the signifi-cant strengthening can be achieved for GH33A at high forge temperature,and some defects in usual DAtreatment to low forge temperature can be overcome.