PM-TiAl基合金热处理及其性能  

Heat Treatment and Performance of PM-TiAl Base Alloy

作　　者：马明珠[1,2] 黄源珣[1] 薛志勇[1] 李冬青[3] 李双寿[4] 

机构地区：[1]华北电力大学,北京102206 [2]天润曲轴股份有限公司,文登264400 [3]哈尔滨工业大学,哈尔滨150001 [4]清华大学,北京100084

出　　处：《宇航材料工艺》2012年第5期55-58,共4页Aerospace Materials & Technology

基　　金：航天科技创新基金重点资助项目(20094030090);中央高校基本科研业务费资助(09MG27);航天创新基金重点项目(CASC200906)

摘　　要：为了优化TiAl合金的使用性能,本文研究了热等静压后的PM-TiAl基合金经过热处理后显微组织的变化情况及力学性能,发现其在热处理温度为1 355℃为全片层组织,在1 335℃为双态组织。全片层组织常温下的抗拉强度为446 MPa,随着温度的升高而增加;屈服强度为386 MPa,随着温度的升高而降低。In order to optimize the usability, microstructure and mechanical property of TiAI based alloy after hot isostatic pressing and hot treatment was studied. After heat-treatment of 1 355℃, organization of TiAI based alloy transformed to full lamellar microstructure. After heat-treatment of 1 335℃, organization of TiA1 based alloy trans- formed to double pattern microstrueture. Tensile strength of full lamellar TiA1 under room temperature is 446 MPa, and will increase with temperature; yield strength of full lamellar TiAl under room temperature is 386 MPa, and will increase with temperature.

关 键 词：TIAL 热处理 全片层组织 相变 

分 类 号：TG146.2[一般工业技术—材料科学与工程]