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2 GH4720Li合金二级均匀化热处理实验方案

Table 2 Two-stage homogenization heat treatment (TSHT) schedules for the GH4720Li alloy

No. Two stage heat treatment TSHT 1 1130 ℃, 8 h＋1160 ℃, 4 h, WC TSHT 2 1130 ℃, 16 h＋1160 ℃, 8 h, WC TSHT 3 1160 ℃, 8 h+1180 ℃, 2 h, WC TSHT 4 1140 ℃, 12 h+1170 ℃, 10 h, AC TSHT 5 1140 ℃, 12 h+1170 ℃, 10 h, 0.2 ℃·min-1 FC to 1010 ℃, and then AC