Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Anti-carbonation quenching distortion control method of large-size dual-herringbone gear

A control method, carburizing and quenching technology, applied in the direction of manufacturing tools, coatings, furnace types, etc., can solve problems such as carburizing and quenching distortion of large-sized double herringbone gears, achieve improved contact fatigue strength and bending fatigue, and reduce manufacturing costs , the effect of quality improvement

Inactive Publication Date: 2018-04-20
SHENYANG TURBO MASCH CORP
View PDF5 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a large-size double herringbone gear anti-carburizing and quenching distortion control method to solve the distortion problem of large-size double herringbone gear carburizing and quenching

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Anti-carbonation quenching distortion control method of large-size dual-herringbone gear
  • Anti-carbonation quenching distortion control method of large-size dual-herringbone gear
  • Anti-carbonation quenching distortion control method of large-size dual-herringbone gear

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The simulated gear material is 12Cr2Ni4 (the chemical composition meets the GB / T3077-1999 standard), and the size of the simulated gear can be found in figure 1 and figure 2 , using it to test the method of anti-carburizing and quenching distortion control of double herringbone gears, including the following steps:

[0031] (1) Preliminary heat treatment: normalizing at 950°C, holding for 5 hours, air cooling; quenching at 860°C, holding for 5 hours, oil cooling, tempering at 650°C, holding for 7.5 hours, air cooling, and conducting metallographic structure inspection, the grain size controlled at level 6.

[0032] (2) Carburizing and quenching furnace: see image 3 and Figure 4, using three-point support tooling, the ratio of the upper surface area of ​​the three-point support tooling to the upper surface area of ​​the original support tooling is 0.2, so that the contact area between the three-point support tooling and the gear is less than 40% of the contact area...

Embodiment 2

[0043] The simulated gear material is 12Cr2Ni4 (the chemical composition meets the GB / T3077-1999 standard), and the size of the simulated gear can be found in figure 1 and figure 2 , using it to test the method of anti-carburizing and quenching distortion control of double herringbone gears, including the following steps:

[0044] (1) Preliminary heat treatment: normalizing at 950°C, holding for 5 hours, air cooling; quenching at 860°C, holding for 5 hours, oil cooling, tempering at 650°C, holding for 7.5 hours, air cooling, and conducting metallographic structure inspection, the grain size controlled at level 6.

[0045] (2) Carburizing and quenching furnace: see image 3 and Figure 4 , using three-point support tooling, the ratio of the upper surface area of ​​the three-point support tooling to the upper surface area of ​​the original support tooling is 0.35, so that the contact area between the three-point support tooling and the gear is less than 40% of the original t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides an anti-carbonation quenching distortion control method of a large-size dual-herringbone gear. The anti-carbonation quenching distortion control method comprises the steps thatan existing carburizing and quenching tool is changed into a three-point supporting tool, before quenching charging after carburization, the upper face and the lower face of the gear are exchanged, and metallographic structure examination and the carburizing and quenching process parameter improvement after heat treatment are prepared. The anti-carbonation quenching distortion control method is used for the large-size dual-herringbone carburizing and quenching gear of a turbocompressor. According to the carburizing and quenching gear controlled through the anti-carbonation quenching distortioncontrol method, the deformation amount of the whole carburizing and quenching process is reduced by above 50%, the gear deformation amount is greatly reduced, the gear quality is greatly improved, the contact fatigue strength and bending fatigue are greatly improved, the grinding amount is reduced, and the cost is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of gear heat treatment, in particular to a method for controlling anti-carburizing and quenching distortion of large-size double herringbone gears. Background technique [0002] At present, the carburizing and quenching distortion of large-sized double herringbone gears is very large. It is often because the deformation after carburizing and quenching is large, and the processing size is not enough for rework. A major difficulty not only affects the production cycle, but also greatly increases the manufacturing cost. [0003] Carburizing and quenching deformation is a worldwide problem. According to the data released by developed countries, the money wasted on carburizing and quenching deformation is quite amazing. At present, for the carburizing and quenching distortion of large-size double herringbone gears, most of them focus on the inspection and analysis of the surface hardness of the distorted gears t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C23F17/00C21D1/78C21D6/00C21D9/32C23C8/22
CPCC23F17/00C21D1/78C21D6/004C21D9/32C23C8/22
Inventor 张忠和舒鑫王全振张尔康赵大为张艳梅
Owner SHENYANG TURBO MASCH CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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