An attempt is made to develop the tools that are capable enough to withstand the shear, impact and thermal forces that occur during friction stir welding of stainless steels. The atmospheric plasma spray and plasma tr...An attempt is made to develop the tools that are capable enough to withstand the shear, impact and thermal forces that occur during friction stir welding of stainless steels. The atmospheric plasma spray and plasma transferred arc hardfacing processes are employed to deposit refractory ceramic based composite coatings on the Inconel 738 alloy. Five different combinations of self-fluxing alloy powder and 60% ceramic reinforcement particulate mixtures are used for coating. The best friction stir welding tool selected based on tool wear analysis is used to fabricate the austenitic stainless steel joints.展开更多
对准Ф219 mm×8.8 mm TA2钛合金管道全位置等离子弧焊仰焊焊缝成形进行了研究,通过对仰焊位置熔池受力分析,阐述了仰焊位置PAW焊缝成形缺陷产生的原因,分析认为仰焊位置PAW内凹的产生与穿孔熔池受重力影响引起的熔池"塌陷&qu...对准Ф219 mm×8.8 mm TA2钛合金管道全位置等离子弧焊仰焊焊缝成形进行了研究,通过对仰焊位置熔池受力分析,阐述了仰焊位置PAW焊缝成形缺陷产生的原因,分析认为仰焊位置PAW内凹的产生与穿孔熔池受重力影响引起的熔池"塌陷"密切相关。仰焊位置PAW的特点是焊缝正面熔宽较大、背面熔宽较小,且焊缝背面余高较小易产生内凹缺陷。通过试验表明,不同焊接参数对焊缝成形影响均不相同,焊缝背面熔宽对焊接参数变化较敏感,当各参数之间相互匹配时,可得到良好的焊缝成形。展开更多
基金the Department of Science and Technology (DST), Government of India for the financial support through Fast Track Scheme for Young Scientists R&D project (SR/FTP/ETA043/2009) to carry out this investigation
文摘An attempt is made to develop the tools that are capable enough to withstand the shear, impact and thermal forces that occur during friction stir welding of stainless steels. The atmospheric plasma spray and plasma transferred arc hardfacing processes are employed to deposit refractory ceramic based composite coatings on the Inconel 738 alloy. Five different combinations of self-fluxing alloy powder and 60% ceramic reinforcement particulate mixtures are used for coating. The best friction stir welding tool selected based on tool wear analysis is used to fabricate the austenitic stainless steel joints.
文摘对准Ф219 mm×8.8 mm TA2钛合金管道全位置等离子弧焊仰焊焊缝成形进行了研究,通过对仰焊位置熔池受力分析,阐述了仰焊位置PAW焊缝成形缺陷产生的原因,分析认为仰焊位置PAW内凹的产生与穿孔熔池受重力影响引起的熔池"塌陷"密切相关。仰焊位置PAW的特点是焊缝正面熔宽较大、背面熔宽较小,且焊缝背面余高较小易产生内凹缺陷。通过试验表明,不同焊接参数对焊缝成形影响均不相同,焊缝背面熔宽对焊接参数变化较敏感,当各参数之间相互匹配时,可得到良好的焊缝成形。
