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) Tar éis coigeartú teocht ard agus cóireáil chrióigineach, téitear an réiteach ar dtús go 950 céim ar feadh 90 nóiméad. Mar gheall ar an méadú ar an bpointe Ms, is féidir méid beag martensite a fháil trí fhuaraithe go teocht an tseomra; méid martensite.
(3) Tar éis cóireáil réitigh trí mhodh dífhoirmithe fuar, déantar dífhoirmiúchán fuar ag teocht an tseomra. Baineann an méid martensite a foirmíodh sa phíobán gan uaim 904L le linn dífhoirmithe fuar leis an méid dífhoirmithe agus comhdhéanamh an phíobáin déanta as cruach dhosmálta 904L.
Is iad na trí mhodhanna thuas modhanna a úsáidtear go coitianta le haghaidh cóireála réitigh ar phíopaí cruach dhosmálta. Tá súil agam gur féidir leo cabhrú leat.