Computers OverClocked Forums Computers OverClocked
"Not just another computer help website."

FAQ Search Upgrade Register
Favorite Threads Private Messaging Login

Menu
Forums
RegisterRegister
Over Clocking Guide
Over Clocking Help
Computer Building Help
Virus/Security Alerts
Broadband Tweaks
Computing Guides
Featured Hot Deals
Reviews
Tools


Top 25 reasons to register!

Advertise your link here for $19.99/month!

 
 Computers OverClocked Welcomes You!
 Date/Time is Sat May 26, 2018 12:05 am
 Computer Photo Gallery
Computing News Headlines:
New HTC Android Phones Tweaked to Evade Apple Patents
Ivy Bridge Temperatures – It’s Gettin’ Hot in Here
Adobe CS6 on sale today, Creative Cloud coming May 11th

Heat treatment process of precipitation hardening Pipe
Post new topic Reply to topic Computers OverClocked Forums - The General Store All times are GMT - 5 Hours - EDT
Author Message
yaangcom
Member



User is offline 
Send private message
Joined: Apr 26 2016
Posts: 370

PostPost subject: Heat treatment process of precipitation hardening Pipe
Posted: Mon Jan 08, 2018 9:50 am
Reply with quote

In the process of processing of stainless steel pipe, the more common one is heat treatment. As a process with certain technical content, the heat treatment of each type of stainless steel pipe can be slightly different.
Solid solution treatment
Precipitation hardening stainless steel tube after solid solution treatment (1000 ~ 1050 ℃, 1 h, air cooling), the microstructure is austenite can be obtained with a small amount of ferrite, and then in 500 ~ 800 ℃ to adjust processing, austenite and ferrite alloy element chromium content is higher in the organization, and the carbide (Cr23C6) easily along the alpha (delta) and r phase interface precipitation, also reduce the austenite content of carbon and other alloying elements in the organization, and thus increase the Ms point of this kind of steel, make it get more martensite microstructure. Alpha (delta) ferritic quantity cannot be too much, otherwise it will have negative effect on heat processing, and will not participate in martensite transformation, thus reducing the strength of stainless steel tube.
Adjust the handle
The intermediate treatment, which is carried out after the stainless steel tube solid solution treatment process, is usually also called adjustment treatment, to obtain a certain amount of martensitic tissue to strengthen the stainless steel tube.
There are three kinds of commonly used method, the first is in the middle as statutes) (hereinafter referred to as T treatment after solid solution treatment and then heated to 760 + 15 ℃, the heat preservation, 90 min, by Cr23C6 carbide precipitation from austenite, reduce the content of carbon and alloy elements in the austenite, the Ms point rise to 70 ℃, then cooled to room temperature will get martensite + + alpha ferrite residual austenite, the residual austenite in 510 ℃ ageing followed up.
Followed by high temperature adjustment and cryogenic treatment method after processing method (R) solid solution, first heated to 950 ℃ warm after 90 minutes. Because it increases Ms point, cools to room temperature, can obtain a small amount of martensite; And then after - 70 ℃ cold treatment, 8 hours heat preservation, can get a certain amount of martensite.
The third method is the cold deformation on the stainless steel tube method (C treatment) after solid solution treatment, cold deformation at room temperature, the amount of cold deformation martensite formed when related to the deformation and the composition of stainless steel tube. Generally, the amount of martensite can be obtained by 15% ~ 20%, and the excessive deformation will harden the martensite and make the plasticity drop significantly.
Aging treatment (H treatment)
The stainless steel tube needs to be treated after adjustment. This aging treatment process is another way for such stainless steel tubes to be strengthened. When processing the aging temperature higher than 400 ℃, precipitation from martensite structure intermetallic compounds (such as Ni3Ti, etc.), a highly dispersed distribution of precipitation hardening effect. Usually at about 500 ℃ for aging treatment, can get satisfactory hardness and high strength.
Source: China Stainless Steel Pipe Manufacturer - Yaang Pipe Industry Co., Limited (www.yaang.com)
Back to top
 Rate Post
View previous topic :: View next topic  
Post new topic Reply to topic Computers OverClocked Forums - The General Store Page 1 of 1


Similar Topics
Topic Author Forum Replies Posted
No new posts Development process and application i... yaangcom The General Store 0 Thu May 24, 2018 10:46 am View latest post
No new posts Characteristics of stainless steel we... yaangcom The General Store 0 Wed May 23, 2018 4:32 pm View latest post
No new posts How to use the bottom welder in stain... yaangcom The General Store 0 Tue May 22, 2018 10:41 am View latest post
No new posts the factors affecting the annealing o... yaangcom The General Store 0 Mon May 21, 2018 7:53 am View latest post
No new posts Application fields of stainless steel... yaangcom The General Store 0 Wed May 16, 2018 9:15 am View latest post