Fuxiao CHEN
,
Juanhua SU
,
Yunlin YANG
,
Hongtao MA
材料科学技术（英文）
The superplastic flow characteristics of hot extruded MB26 Mg alloy under the conditions of tension are studied. The effects of deformation temperature and strain rate on superplasticity are analyzed. On the other hand, the superplastic extrusion of MB26 Mg alloy is also studied.
关键词:
Keke ZHANG
,
Yunlin YANG
,
Changsheng WANG
,
Hongke LI
,
Jin XUE
材料科学技术（英文）
The microstructure of 40Cr and T10A steel sample and its surface to be welded is ultra-fined through salt-bath cyclic quenching and high frequency hardening, then the surface is cleaned. Under non-vacuum and no shielded gas, the welding parameter of isothermal superplastic solid-phase welding and the effect of surface microstructure prior to pressure welding on the quality of joint are stud led. At the temperature of 730 similar to 750 ℃ and at initial strain rate of (2～4) x 10(-4) s(-1) the strength of the joint is up to or close to that of 40Cr base metal in 3 similar to5 min pressure welding.
关键词:
