Heat treatment method of high-strength bolt for electric tool
A technology of high-strength bolts and heat treatment methods, applied in heat treatment furnaces, heat treatment equipment, manufacturing tools, etc., can solve problems such as the inability to meet the requirements of high-power, lightweight electric tools
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0047] A heat treatment method for high-strength bolts used in impact electric drills, using standard M10x35 / 12.9 bolts made of 42CrMo, therefore, the process before the bolt isothermal quenching heat treatment is omitted, mainly including the following steps:
[0048] (1) Send the bolt workpiece to the fully automatic salt quenching equipment under atmosphere protection and computer control, and the protection atmosphere is carbon monoxide;
[0049] (2) In the heating furnace of the fully automatic salt quenching equipment, the bolts are heated to 900°C and then held for 80 minutes for austenitization;
[0050] (3) Put the bolts that have been austenitized in step (2) into the salt tank of the salt bath furnace of the automatic salt quenching equipment, rapidly cool down to 370°C in the salt tank, and then keep it warm for 1.5 hours for austempering heat treatment; Wherein, the molten salt solution is a mixed solution of potassium nitrate with a mass ratio of 50% and sodium n...
Embodiment 2
[0056] A heat treatment method for high-strength bolts for electric hammers, using standard bolts of M10x35 / 12.9 grade, omitting forging and other general procedures, mainly including the following steps:
[0057] (1) Send the bolts to the fully automatic salt quenching equipment under atmosphere protection and computer control, and the protection atmosphere is carbon monoxide;
[0058] (2) In the heating furnace of the fully automatic salt quenching equipment, the bolts are heated to 820°C and then held for 40 minutes for austenitization;
[0059] (3) Put the bolts treated with austenite in step (2) into the salt tank of the salt bath furnace of the automatic salt quenching equipment, rapidly cool down to 330° C. in the salt tank, and then keep warm for 1 hour to carry out austempering heat treatment; , the molten salt solution is a mixed solution of potassium nitrate with a mass ratio of 50% and sodium nitrate with a mass ratio of 50%;
[0060] (4) Under normal temperature ...
PUM
Property | Measurement | Unit |
---|---|---|
Tensile strength | aaaaa | aaaaa |
Tensile strength | aaaaa | aaaaa |
Tensile 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