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Carburized bearing steel

A carburizing bearing and bearing steel technology, applied in the manufacturing and processing field of bearing steel in the metallurgical industry, can solve the problems of complex process, high carburizing process, coarse grains, etc., achieve high relative purity, optimize comprehensive performance, grain size high degree of effect

Inactive Publication Date: 2015-06-10
DALIAN FEIMA OFFICE FURNITURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to obtain a good surface carburizing effect, the requirements for the carburizing process are relatively high, and the process is complicated
Bearing steel needs to be kept at high temperature for a long time during the surface carburizing process, which is likely to cause defects such as coarse grains

Method used

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  • Carburized bearing steel
  • Carburized bearing steel
  • Carburized bearing steel

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0021] Proportion the bearing steel according to the composition of the following weight ratio:

[0022]

[0023] It is smelted in an electric furnace, degassed in a vacuum furnace, poured into a steel ingot, and then rolled into a round steel, and then annealed. Heat treatment by carburizing method (heat treatment process: heat preservation at 800°C for 10 hours, furnace cooling to 200°C and air cooling). The obtained bearing steel is subjected to quenching at 900°C and secondary tempering heat treatment at 170°C. Finally, the obtained carburized bearing steel is tested for mechanical properties and other comprehensive properties. Obtained after detection and analysis: The bearing steel obtained in the embodiment of the present invention has the mechanical properties and other comprehensive properties after testing. Carbon bearing steel.

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PUM

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Abstract

The invention relates to a carburized bearing steel, which consists of the following components by weight: iron, silicon, chromium, nickel, carbon, copper, manganese, molybdenum, sulfur, aluminum, nitrogen, titanium, tin, oxygen and phosphorus. The carburized bearing steel has high relative purity and long contact fatigue life, and the content of trace elements has no influence to purity while optimizing the comprehensive performance of carburized bearing steel. The carburized bearing steel has good comprehensive mechanical properties, and has hardness, strength, elongation and shrinkage degree superior to ordinary bearing steel, thus being suitable for extensive application.

Description

technical field [0001] The invention belongs to the field of manufacturing and processing of bearing steel in the metallurgical industry, and in particular relates to a carburized bearing steel. Background technique [0002] Bearing steel is an important supporting part of various mechanical parts. Due to its wide application and importance in the application process, bearing steel has relatively high performance requirements, especially in terms of chemical composition, dimensional accuracy, purity, and surface defects. The uniformity of carbides, etc. [0003] Nitriding and carburizing treatment of bearing steel can improve its comprehensive mechanical properties. Especially the carburized bearing steel obtained by carburizing has higher surface hardness, better wear resistance, higher fatigue resistance and good dimensional stability. However, in order to obtain a good surface carburizing effect, the requirements for the carburizing process are relatively high, and the ...

Claims

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Application Information

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IPC IPC(8): C22C38/60
Inventor 刘官柱
Owner DALIAN FEIMA OFFICE FURNITURE
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