It has been seen that the though si

It has been seen that the though sigma phase is formed at high temperature , embrittlement by sigma phase in Austenitic SS does not
normally occur at high temperatures of say within 560 -980 deg C as the weld or base material themselves are soft at high temperature
and if the ferrite in the weld is kept within 10 -12% and the welds are not subjected to high impact loading in service. Hence I expect for M38 ( and also for M393 ) , if the service temperature is kept high for a long time and there is no high impact loading on weld at high temperature , there should not be any problem in weld

結果 (繁體中文) 1:

它發生過，雖然西格瑪階段產生高溫，奧氏體 SS 西格瑪相脆不通常發生在高溫下的內 560-980 ℃ 作為焊縫或基材說本身就是軟在高溫如果在焊縫鐵素體保持在 10-12%和焊縫不會受到高衝擊載荷在服務。因此我預計為 M38 （和 M393），如果服務溫度長時間保持高和沒有高的衝擊載荷作用在高溫焊接，焊縫中不應該有任何問題

結果 (繁體中文) 2:

已經看到，在高溫下形成，雖然σ相，脆化由σ相奧氏體不銹鋼並不
通常發生在高溫下於560 -980攝氏度的焊縫或母材說本身是在高溫下軟
並如果在焊接鐵氧體保持10 -12％的範圍內和焊縫不經受在服務高衝擊載荷。因此，我期望M38（也為M393），如果服務溫度保持高很長一段時間，而且對在高溫焊接沒有高衝擊載荷，不應該有焊縫的任何問題