Abstract: GH3625 alloy with carbon content of 0. 031% ,0. 048% and 0. 055% is forged from 4>480 mm ingot to 0155 mm bar and rolled into 090 mm bar and heating at 1 000 °C for 1 h, air cooling. Tlie 0.023% C alloy is forged from Φ480 mm to Φ180 mm,Φ155mm and Φ 135 mm respectively,and the Φ155 mm forging stock is rolled to Φ90 mm and Φ80 mm bar respectively by the 450 horizontal rolling mill. The following solid solution treatment is heated at 950 °C for 1 h,air cooling. The test results show that with increasing the C content from 0. 031% to 0. 055% the yield and tensile strength of GH3625 alloy increase respectively from 419 and 862 MPa to 597 and 938 MPa. But the elongation and reduction of section of alloy have little change. With the increase of deformation from 85. 9% to 97. 2% , the grain size rating of 0.023% C GH3625 alloy changes from 4 to 6, and the mechanical properties are improved.

Key words: Superalloy GH3625, Carbon Content, Deformation, Grain Size

摘要： 将含C量0.031%、0.048%和0.055%的GH3625合金由Φ480 mm铸锭锻造成Φ155 mm,轧制成Φ90 mm的棒材,后续固溶处理为加热至1 000℃,保温1 h后空冷;将C含量0.023%Φ480 mm铸锭分别锻造至Φ180 mm、Φ155 mm和Φ135 mm,将Φ155 mm的锻棒在450横列轧机上分别轧至Φ90 mm和Φ80 mm,后续进行固溶处理为加热至950℃,保温1 h后空冷。试验结果表明:当C含量由0.031%增加至0.055%时,GH3625合金的屈服强度和抗拉强度分别由419和862 MPa增加至597和938 MPa,合金的伸长率和断面收缩率变化不大;随着变形量由85.9%增至97.2%,0.023%C GH3625合金的晶粒度由4级变为6级,力学性能得到提升。

关键词: 高温合金, GH3625,  , C含量, 变形量, 晶粒度