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Bearing steel with enhanced Rockwell hardness

A technology of Rockwell hardness and bearing steel, applied in the field of bearings, can solve the problem that the bearing cannot meet the requirements, and achieve the effect of enhancing the Rockwell hardness

Inactive Publication Date: 2017-05-31
徐文萍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Bearings are the most commonly used parts in production, but due to the increasing requirements for bearings, some current bearings can no longer meet the requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The preparation of embodiment 1 bearing steel

[0041] The composition of the bearing steel with enhanced Rockwell hardness is (by weight %):

[0042] 0.28% carbon;

[0043] 1.0% manganese;

[0044] 0.13% phosphorus;

[0045] 0.17% sulfur;

[0046] 1.00% silicon;

[0047] 0.06% aluminum;

[0048] 0.01% nitrogen;

[0049] 0.61% chromium;

[0050] 0.05% niobium;

[0051] 0.40% copper;

[0052] 0.40% nickel;

[0053] 1.00% molybdenum;

[0054] 0.2% vanadium;

[0055] 0.0055% boron;

[0056] 0.040% Titanium:

[0057] The rest is iron and unavoidable impurities.

[0058] 30 kg of a steel material having the above composition was melted in a high-frequency vacuum furnace, followed by casting in which the cooling rate was 1.2° C. / min to form an ingot. The ingot was kept at 950°C for 10 hours and then at 500°C for 90 minutes. Thereafter, hot forging was performed using a 500-ton hammer forging machine, thus producing Bearing Steel 1 .

Embodiment 2

[0059] The preparation of embodiment 2 bearing steel

[0060] Bearing steel 2 was prepared in the same manner as in Example 1, except that molybdenum was not used.

Embodiment 3

[0061] Preparation of Embodiment 3 Bearing Steel

[0062] Bearing Steel 3 was prepared in the same manner as in Example 1, except that boron was not used.

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Abstract

The present invention relates to bearing steel with the enhanced Rockwell hardness. The bearing steel with the enhanced Rockwell hardness is composed of (by weight percentage): 0.25%-0.29% of carbon; 0.10%-1.20% of manganese; 0.09%-0.13% of phosphorus; 0.10%-0.19% of sulfur; 0.60%-1.00% of silicon; 0.09% or less of aluminum; 0.01% or less of nitrogen; 0.45%-0.83% of chromium; 0.04%-0.07% of niobium; 0.50% or less of copper; 0.05%-0.60% of nickel; 0.2%-2.00% of molybdenum; 0.2%-0.4% of vanadium; 0.0030%-0.0065% of boron; 0.010%-0.050% of titanium; and the residual of iron and unavoidable impurities. The bearing steel has the enhanced Rockwell hardness and can be widely applied to the field of bearings.

Description

technical field [0001] The invention relates to the field of bearings, in particular to a bearing steel with enhanced Rockwell hardness. Background technique [0002] Bearings are the most commonly used parts in production, but due to the increasingly high requirements for bearings, some current bearings can no longer meet the requirements. Contents of the invention [0003] The object of the present invention is to provide a bearing steel with enhanced Rockwell hardness. [0004] In order to realize the purpose of the present invention, the present invention provides a kind of bearing steel that Rockwell hardness strengthens, and its composition is (by weight %): [0005] 0.25% to 0.29% carbon; [0006] 0.10% to 1.20% manganese; [0007] 0.09% to 0.13% phosphorus; [0008] 0.10% to 0.19% sulfur; [0009] 0.60% to 1.00% silicon; [0010] ≤0.09% aluminum; [0011] ≤0.01% nitrogen; [0012] 0.45% to 0.83% chromium; [0013] 0.04% to 0.07% niobium; [0014] ≤0.50% c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/60
Inventor 徐文萍
Owner 徐文萍
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