摘要
通过自由胀形实验研究了等离子弧焊对接板的超塑胀形性能及影响因素.结果表明等离子弧焊对接板具有良好的超塑胀形性能,其极限胀形高度可超过凹模半径.在胀形过程中,焊缝组织发展成球状α+长条状α组织.焊缝和基体间存在变形不均匀性.在同样的胀形条件下,胀形气压有一最佳数值,气压过大或过小均降低极限胀形高度.最后给出了一个应用等离子弧焊对接板进行超塑胀形的实例.
The Superplastic bulging capabilities of a plasma arc welding (PAW) butt-welded plate was studied using simple bulging tests. The experimental results indicate that the PAW butt-welded plate possesses good superplastic bulging capability that the maximum bulge height can exceed the radius of the female die. During bulging the acicular martensite microstructure of weld metal transformed into spherical α+streak α microstructure. The bulging gas pressure has an optimum value under the same conditions.An actual superplastic bulge example was given for the application of PAW butt-welded plate.
出处
《材料科学与工艺》
EI
CAS
CSCD
2003年第2期155-158,共4页
Materials Science and Technology
