A welding method for 12Cr2Mo1V steel and 20MnMo steel
Patent Information
- Application Number
- CN202610439538.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-04-03
- Publication Date
- 2026-07-17
AI Technical Summary
12Cr2Mo1V steel and 20MnMo steel have significant differences in chemical composition and mechanical properties, and their post-weld stress-relief heat treatment temperature ranges do not overlap, making direct welding impossible.
The first bevel is machined on 12Cr2Mo1V steel to form the first weld. After cutting to form a transition layer, the second bevel is machined on the transition layer and then assembled with 20MnMo steel to form the fourth bevel. Alloy steel welding materials are used for welding to form the second weld. The transition layer is increased to reduce the welding difficulty.
It reduced welding difficulty, decreased cracking problems, improved production efficiency, and met the welding requirements of 12Cr2Mo1V steel and 20MnMo steel.
Smart Images
Figure CN122400727A_ABST