冷轧变形量对传感器用固溶态BT22钛合金板组织及拉伸性能的影响  

Influence of cold rolling deformation amount on microstructure and tensile properties of solid solution BT22 titanium alloy plate for sensor

作　　者：张晓斌[1] 李海生 Zhang Xiaobin;Li Haisheng(Department of Equipment Engineering,Henan Vocational and Technical College of Architecture,Zhengzhou 450064,China;School of Physics and Engineering,Henan University of Science and Technology,Luoyang 465000,China)

机构地区：[1]河南建筑职业技术学院设备工程系,河南郑州450064 [2]河南科技大学物理工程学院,河南洛阳465000

出　　处：《锻压技术》2021年第10期93-98,共6页Forging & Stamping Technology

基　　金：国家自然科学基金专项基金项目(11347209)。

摘　　要：为了提高传感器基板用BT22钛合金板的力学性能,先通过850℃+0.5 h固溶处理,然后通过冷轧的方式对其进行加强。通过实验测试手段研究冷轧变形量对固溶态BT22钛合金板的组织及拉伸性能的影响。研究结果表明:综合运用高冷轧变形量与较低再结晶温度有助于BT22钛合金板发生再结晶时形成更多细小尺寸的晶粒。轧制后BT22钛合金板的强度比轧制之前的强度有了较大的提升,强度至少提高200 MPa。随着冷轧变形量的增加,合金强度不断增加,但增加幅度减小。冷轧后合金的伸长率虽有所下降,但依然可以保持在10%以上。冷轧变形后合金的最高屈服强度在冷轧变形量为80%时取得,此时合金的屈服强度为1012 MPa,抗拉强度为1042 MPa,伸长率为10%。In order to improve the mechanical properties of BT22 titanium alloy plate used as sensor substrate,BT22 titanium alloy plate was first treated by solid solution treatment at 850℃+0.5 h and then strengthened by cold rolling,and the influences of cold rolling deformation amount on the microstructure and tensile properties of solid solution BT22 titanium alloy plate were studied by experimental testing method.The results show that the comprehensive use of high cold rolling deformation amount and low recrystallization temperature can help BT22 titanium alloy plate to form more fine-sized grains when the recrystallization occurs.After rolling,the strength of BT22 titanium alloy plate is greatly improved compared with that before rolling,and the strength is increased by at least 200 MPa.With the increasing of cold rolling deformation amount,the strength of alloy increases continuously,but the increase amplitude decreases.Although the elongation of alloy decreases after cold rolling,it still remains above 10%.In addition,the maximum yield strength of alloy after cold rolling is obtained when the cold rolling deformation amount is 80%,and the yield strength,tensile strength and elongation of alloy are 1012 MPa,1042 MPa and 10%,respectively.

关 键 词：冷轧变形量 固溶处理 钛合金 微观组织 拉伸性能 

分 类 号：TG146[一般工业技术—材料科学与工程]