快速加热感应热处理对TiAl基合金组织与性能的影响

Effects of Rapid Heating Induction Heat Treatment on Microstructures and Mechanical Properties of TiAl based Alloy

采用 GP- 30 (A)感应加热设备 ,研究了快速加热、慢速冷却循环热处理对 Ti Al基合金显微组织和力学性能的影响。结果表明 ,利用该工艺可获得晶团尺寸约为 5 0μm,层片间距约为 0 .12μm的细小全层片组织 ;可以较大幅度地提高压缩力学性能 ,最佳综合性能可达屈服应力 745 .1MPa,最大流变应力 16 72 .12 MPa和压缩率 19.4% ;

The effects of rapid heating, slow cooling heat treatment on microstructures and mechanical properties of a TiAl based alloy were studied using a GP 30(A) type induction heating machine The results show that: fine fully lamellar microstructure of colony size about 50μm and lamellar spacing about 0 12μm can be obtained by using this technology; compression mechanical properties can be raised to a large extent and the best compression mechanical properties can reach the yield stress 745 1MPa, the largest flowstress 1672 2MPa and the compression ratio 19 4%; after induction heat treatment and aging, the compression fracture at room temperature is still typical cleavage fracture