A method for obtaining ultra-fine pearlite of low-carbon and low-alloy black skin forged steel shaft
A low-alloy, pearlite technology, used in furnaces, heat treatment equipment, heat treatment furnaces, etc., can solve the problems of insufficiency, unstable heat treatment process, inability to obtain ultra-fine pearlite + ferrite structure, etc., to improve the yield strength. , the effect of good mechanical properties
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0014] Taking the 16MnD black leather forged steel shaft with a diameter of Φ300mm as an example, the process steps are as follows:
[0015] (1) Put the 16MnD black leather forged steel shaft into the heat treatment furnace, heat it to 910°C, and keep it warm for 11.3 hours;
[0016] (2) Pre-cooling out of the oven, the pre-cooling time is 4.5 minutes;
[0017] (3) Place the black-skin forged steel shaft in a pool with a water temperature of 18-30°C and set up multiple strong stirring points to cool for 5 seconds;
[0018] (4) Take the black-skinned forged steel shaft out of the pool and air-cool it, take samples at room temperature, and conduct metallographic inspection under an 800-fold optical microscope. If the internal pearlite lamellar spacing is 0.2-0.25µm, it is considered qualified.
Embodiment 2
[0020] Taking the 20MnMo black leather forged steel shaft with a diameter of Φ500mm as an example, the process steps are as follows:
[0021] (1) Put the 20MnMo black skin forged steel shaft into the heat treatment furnace and heat it to 900°C, and keep it warm for 20 hours;
[0022] (2) Pre-cooling out of the oven, the pre-cooling time is 7.5 minutes;
[0023] (3) Put the black-skinned forged steel shaft in a pool with a water temperature of 18-30°C and set up multiple points of strong stirring for 8 seconds;
[0024] (4) Take the black-skinned forged steel shaft out of the water pool and air-cool it, take samples at room temperature, and conduct metallographic inspection under an 800-fold optical microscope. If the internal pearlite lamellar spacing is 0.2-0.25µm, it is considered qualified.
[0025] The present invention utilizes the characteristic that the surface of the black-skinned forged steel shaft has a 3-4 mm thick decarburization protective layer, even if the whol...
PUM
Property | Measurement | Unit |
---|---|---|
yield strength | aaaaa | aaaaa |
yield strength | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com