压力容器
壓力容器
압력용기
2015年
7期
75-80
,共6页
双相不锈钢%S32750%双管板换热器%液压胀
雙相不鏽鋼%S32750%雙管闆換熱器%液壓脹
쌍상불수강%S32750%쌍관판환열기%액압창
duplex stainless steel%S32750%double tubesheet exchanger%hydraulic expanding
双相不锈钢 S32750强度及硬度高，以 S32750为换热管的双管板换热器胀接困难。将内管板材质由原设计的16Mn，Ⅲ级锻件改为20MnMoNb，Ⅲ级锻件，将管板孔槽由原设计的3－6－3结构改为8－8－8结构，采用液压胀，解决了 S32750高强钢胀接难题。
雙相不鏽鋼 S32750彊度及硬度高，以 S32750為換熱管的雙管闆換熱器脹接睏難。將內管闆材質由原設計的16Mn，Ⅲ級鍛件改為20MnMoNb，Ⅲ級鍛件，將管闆孔槽由原設計的3－6－3結構改為8－8－8結構，採用液壓脹，解決瞭 S32750高彊鋼脹接難題。
쌍상불수강 S32750강도급경도고，이 S32750위환열관적쌍관판환열기창접곤난。장내관판재질유원설계적16Mn，Ⅲ급단건개위20MnMoNb，Ⅲ급단건，장관판공조유원설계적3－6－3결구개위8－8－8결구，채용액압창，해결료 S32750고강강창접난제。
Because of duplex stainless steel S32750 high strength,high hardness,so the tube expanding of S32750 for double tubesheet exchanger was difficulty.The inner tubesheet forgings changed from original design 16Mn Gr.Ⅲ to 20MnMoNb Gr.Ⅲ and the tubesheet hole groove structure changed from 3 -6 -3 to 8 -8 -8 and used hydraulic expansion the problem of high strength steel S32750 tube expanding was solved.
