The use of stainless steel pipes is now more and more extensive. Because of its good corrosion resistance, it plays a crucial role in engineering construction. In the process of production, we need to perform solution treatment on stainless steel pipes. The main purpose is to obtain certain Martensite increases the hardness of the product. Let's take a look at the solution treatment of stainless steel pipes:
(1) The intermediate aging method is heated to (760±15) degree after the solution treatment, and the temperature is kept for 90 minutes because Cr23C6 carbides are precipitated from the austenite, which reduces the carbon and alloying elements content in the austenitic 904L stainless steel pipe , the Ms point is raised to 70 degree and then cooled to room temperature to obtain martensite plus ferrite plus retained austenite structure, and the retained austenite is decomposed after aging at 510 degree .
(2) Efter justering af høj temperatur og kryogen behandling opvarmes opløsningen først til 950 grader i 90 minutter. På grund af stigningen af Ms-punktet kan en lille mængde martensit opnås ved afkøling til stuetemperatur; mængde martensit.
(3) Efter opløsningsbehandling ved kolddeformationsmetode udføres kolddeformation ved stuetemperatur. Mængden af martensit dannet i det sømløse 904L rør under kold deformation er relateret til mængden af deformation og sammensætningen af det 904L rustfri stålrør.
Ovenstående tre metoder er almindeligt anvendte metoder til opløsningsbehandling af rustfri stålrør. Jeg håber, de kan hjælpe dig.