Low temperature impact energy were measured seperately for 3 5Ni steel plates of two brands, which were subjected to cold deformation plus manual aging and tempering.The results show that the low temperature impact en...Low temperature impact energy were measured seperately for 3 5Ni steel plates of two brands, which were subjected to cold deformation plus manual aging and tempering.The results show that the low temperature impact energy reduces greatly after cold deformation plus manual aging,and that the tempering after cold deformation can improve the low temperature toughness remarkably,and this improvement are influenced by the primary microstructure of the steel and the extend of cold deformation.展开更多
The paper introduces the surfacing technique of flange fabrication with surfacing formed method,experiment resulst of the process,welding for this kind of flanded and the benefits using these flanges instead of forgin...The paper introduces the surfacing technique of flange fabrication with surfacing formed method,experiment resulst of the process,welding for this kind of flanded and the benefits using these flanges instead of forging flanges in the pressure vessel fabrication.展开更多
In fabrication of pressure vessel, narrow gap submerged arc welding is an important process in order to decrease the number of welding passes of thick steel plate, however, conventional fluxes are applied to narrow ga...In fabrication of pressure vessel, narrow gap submerged arc welding is an important process in order to decrease the number of welding passes of thick steel plate, however, conventional fluxes are applied to narrow gap groove, it it very difficult to remove welded slag. It was found out from experimental results that a decrease in expansion due to transformation or an increase in the total thermal contraction of slag during cooling period is effective in imporovimg slag detachability. According to this results, A new agglomerated flux which has good detachability has been developed.展开更多
Conjugated spherical metal shells are an idea combination of pressure vessels,and the total vessel volume could be adjusted through different combinations of the components.But the difficulties of manufacturing those ...Conjugated spherical metal shells are an idea combination of pressure vessels,and the total vessel volume could be adjusted through different combinations of the components.But the difficulties of manufacturing those conjugated parts limited its wide application of such vessels.The results of non-die explosive forming of conjugated spherical pressure vessels might provide a new and simple manufacturing method of such construction.展开更多
s paper introduced the pressing characteristics of weiding pipe,establishment of the pressing parameter and the arrangement of the forming procedure.The paper also analyse the using function of the pipe after the pres...s paper introduced the pressing characteristics of weiding pipe,establishment of the pressing parameter and the arrangement of the forming procedure.The paper also analyse the using function of the pipe after the pressure forming.展开更多
文摘Low temperature impact energy were measured seperately for 3 5Ni steel plates of two brands, which were subjected to cold deformation plus manual aging and tempering.The results show that the low temperature impact energy reduces greatly after cold deformation plus manual aging,and that the tempering after cold deformation can improve the low temperature toughness remarkably,and this improvement are influenced by the primary microstructure of the steel and the extend of cold deformation.
文摘The paper introduces the surfacing technique of flange fabrication with surfacing formed method,experiment resulst of the process,welding for this kind of flanded and the benefits using these flanges instead of forging flanges in the pressure vessel fabrication.
文摘In fabrication of pressure vessel, narrow gap submerged arc welding is an important process in order to decrease the number of welding passes of thick steel plate, however, conventional fluxes are applied to narrow gap groove, it it very difficult to remove welded slag. It was found out from experimental results that a decrease in expansion due to transformation or an increase in the total thermal contraction of slag during cooling period is effective in imporovimg slag detachability. According to this results, A new agglomerated flux which has good detachability has been developed.
文摘Conjugated spherical metal shells are an idea combination of pressure vessels,and the total vessel volume could be adjusted through different combinations of the components.But the difficulties of manufacturing those conjugated parts limited its wide application of such vessels.The results of non-die explosive forming of conjugated spherical pressure vessels might provide a new and simple manufacturing method of such construction.
文摘s paper introduced the pressing characteristics of weiding pipe,establishment of the pressing parameter and the arrangement of the forming procedure.The paper also analyse the using function of the pipe after the pressure forming.
