热处理工艺对GH4720Li合金细晶铸锭组织与热加工性能的影响

王涛,万志鹏,李钊,李佩桓,李鑫旭,韦康,张勇

Effect of Heat Treatment Parameters on Microstructure and Hot Workability of As-Cast Fine Grain Ingot of GH4720Li Alloy

Tao WANG,Zhipeng WAN,Zhao LI,Peihuan LI,Xinxu LI,Kang WEI,Yong ZHANG

表1 GH4720Li合金一级均匀化热处理实验方案

Table 1 One-stage homogenization heat treatment (OSHT) schedules for the GH4720Li alloy

No. One stage heat treatment OSHT 1 1140 ℃, 1 h, WC OSHT 2 1140 ℃, 8 h, WC OSHT 3 1140 ℃, 16 h, WC OSHT 4 1160 ℃, 1 h, WC OSHT 5 1160 ℃, 14 h, WC OSHT 6 1160 ℃, 24 h, AC OSHT 7 1160 ℃, 14 h, 0.2 ℃·min-1 FC to 1010 ℃, and then AC