The use of stainless steel pipes is now more and more widely used. Because of its good corrosion resistance, it plays a vital role in engineering construction. During the production process, we need to perform solid solution treatment on stainless steel pipes. The main purpose is to obtain certain Martensite increases the hardness of the product. Let's look at the solid solution treatment of stainless steel pipes below:
(1) Intermediate aging method heats to (760±15) degree after solution treatment, keeps holding for 90min, because Cr23C6 carbide precipitates from austenite, which reduces the content of carbon and alloying elements in the austenitic 904L stainless steel tube , 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) Selepas pelarasan suhu tinggi dan rawatan kriogenik, panaskan hingga 950 darjah dan tahan selama 90 minit selepas larutan pepejal. Kerana titik Ms dinaikkan, sejumlah kecil martensit boleh diperolehi dengan menyejukkan ke suhu bilik; selepas itu, ia boleh diperolehi dengan rawatan sejuk pada -70 darjah dan tahan selama 8 jam. Jumlah martensit.
(3) After the cold deformation method and solution treatment, it is cold deformed at room temperature. The amount of martensite formed in the 904L seamless tube during cold deformation is related to the deformation and the composition of the 904L stainless steel tube.
The above three methods are commonly used methods of solid solution treatment of stainless steel pipes. Hope to help everyone.