Unlock instant, AI-driven research and patent intelligence for your innovation.

Spheroidizing annealing heat treatment method for ultrahigh carbon type bearing steel

A heat treatment method and spheroidizing annealing technology, applied in the field of spheroidizing annealing heat treatment of ultra-high carbon bearing steel, can solve the problems of short time consumption, and achieve the effects of short time consumption, convenient temperature control and fast cooling speed

Active Publication Date: 2021-09-03
临清市同兴轴承锻造有限公司 +1
View PDF11 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention aims at the above-mentioned deficiencies in the prior art, and provides a spheroidizing annealing heat treatment method for ultra-high carbon bearing steel. Short time consumption, so as to achieve the purpose of saving energy, reducing decarbonization defects, and shortening the production cycle

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
  • Spheroidizing annealing heat treatment method for ultrahigh carbon type bearing steel
  • Spheroidizing annealing heat treatment method for ultrahigh carbon type bearing steel
  • Spheroidizing annealing heat treatment method for ultrahigh carbon type bearing steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A spheroidizing annealing heat treatment method for ultra-high carbon bearing steel, comprising the following steps:

[0045] (1) Preparation of nano-bainite + martensite multiphase structure: Austenitize the forged or rolled ultra-high carbon bearing steel at 850-1000°C, and the heating time for austenitization is super The effective thickness of high-carbon bearing steel is multiplied by the heating coefficient of 1-1.5min / mm, and then immersed in a salt bath furnace at 200-300°C for 15-60min isothermal treatment. After isothermal treatment, water quenching or oil quenching or lower than Ms The salt bath at the point can get the multi-phase structure of nanobainite and martensite;

[0046] Wherein, by weight percentage, the chemical composition of the ultra-high carbon bearing steel is: C: 1.01-1.40%, Si: 0.5-2.0%, Mn: 0.5-2.0%, Cr: 0.5-2.0%, Al: 1.0 -2.0%, Mo: 0-0.5%, V: 0-2.0%, Re: 0-0.5%, and the balance is Fe.

[0047] Among them, the effective thickness of ultr...

Embodiment 2

[0054] A spheroidizing annealing heat treatment method for ultra-high carbon bearing steel, comprising the steps of:

[0055] (1) Preparation of nanobainite + martensite multiphase structure: according to weight percentage, in this embodiment, the chemical composition of ultra-high carbon bearing steel is: C: 1.17%, Mn: 0.53%, Si: 0.50% , Cr: 1.53%, Al: 1.46%, and the balance is Fe.

[0056] The billet of ultra-high carbon bearing steel is fully austenitized at 1200°C and then forged into a rod shape, and cooled under control to obtain a structure of pearlite + a small amount of secondary carbide, such as figure 1 shown.

[0057] Then carry out austenitization at 850°C, the heating time is 1min / mm (according to the effective thickness), then immerse in a salt bath furnace at 300°C for 45min isothermal treatment, and finally carry out oil quenching to obtain nano-bainite + martensite complex Phase organization, such as figure 2 shown.

[0058] (2) Spheroidizing annealing h...

Embodiment 3

[0062] A spheroidizing annealing heat treatment method for ultra-high carbon bearing steel, comprising the steps of:

[0063] (1) Preparation of nanobainite + martensite multiphase structure: according to the weight percentage, in this embodiment, the chemical composition of the ultra-high carbon bearing steel is: C: 1.32%, Mn: 0.52%, Si: 0.49% , Cr: 1.51%, Al: 1.52%, and the balance is Fe.

[0064] The billet of ultra-high carbon bearing steel is fully austenitized at 1200°C and then forged into a rod shape, and cooled under control to obtain a structure of pearlite + a small amount of secondary carbide, such as Figure 4 shown.

[0065] Then carry out austenitization at 880°C, the heating time is 1min / mm (according to the effective thickness), then immerse in a salt bath furnace at 270°C for 45min isothermal treatment, and finally carry out oil quenching to obtain nano-bainite + martensite complex Phase organization, such as Figure 5 shown.

[0066] (2) Spheroidizing an...

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

PropertyMeasurementUnit
sizeaaaaaaaaaa
Vickers hardnessaaaaaaaaaa
sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a spheroidizing annealing heat treatment method for ultrahigh carbon type bearing steel, and relates to the technical field of heat treatment of the ultrahigh carbon type bearing steel. The spheroidizing annealing heat treatment method for ultrahigh carbon type bearing steel comprises the following steps that the ultrahigh carbon type bearing steel with a nano bainite and martensite complex phase structure is subjected to isothermal treatment for 4-8 h at the temperature of 700-750 DEG C and then discharged out of a furnace to be cooled, and a spheroidizing annealing structure with fine granular carbides evenly distributed on an equiaxed ferrite matrix can be obtained. The time consumption of the spheroidizing annealing heat treatment method is shorter than that of an existing spheroidizing annealing heat treatment method, and therefore the purposes of saving energy, reducing consumption, reducing decarburization defects and shortening the production period can be achieved.

Description

technical field [0001] The invention relates to the technical field of heat treatment of ultra-high carbon bearing steel, in particular to a spheroidizing annealing heat treatment method of ultra-high carbon bearing steel. Background technique [0002] Ultra-high carbon bearing steel with a multiphase structure of nanobainite and martensite is a new type of bearing steel. The excellent strength and toughness of the multiphase structure of nanobainite and martensite endows this The super-long fatigue life of the new type of bearing steel makes it have broad application prospects in bearings and other fields. [0003] The Chinese patent application number CN201310442972.1 discloses "A Heat Treatment Method for Ultra-High Carbon Type Bearing Steel". After this heat treatment method, it can be prepared with martensite + super bainite + retained austenite + residual carbide Ultra-high carbon bearing steel with multi-phase structure, the multi-phase structure of martensite + supe...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C21D6/00C21D1/32C21D1/20C22C38/02C22C38/04C22C38/06C22C38/22C22C38/24C22C38/34C22C38/38
CPCC21D6/002C21D6/005C21D6/008C21D1/32C21D1/20C22C38/02C22C38/04C22C38/06C22C38/22C22C38/24C22C38/34C22C38/38C22C38/002C21D2211/002C21D2211/008C21D2211/005C21D2211/004
Inventor 刘宏基汪庆刚姚鲁
Owner 临清市同兴轴承锻造有限公司
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com