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Bearing steels

A technology of bearing steel and bearings, applied in the direction of bearings, bearing components, shafts and bearings, etc., can solve problems such as limiting steel size and shape

Active Publication Date: 2015-06-03
AB SKF
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to avoid the effects of stray magnetic fields, the furnace is generally designed to be coaxial, which limits the size and shape of the steel that can be manufactured

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0081] now refer to figure 1 and 2 The manufacture of stainless steel bearings is illustrated by way of non-limiting example.

[0082] Such as figure 1 Steel composition 6 was prepared in induction furnace 5 as shown in . The necessary ingredients 2 to provide the desired composition are fed into an induction furnace 5 . An AC power connection and two electrodes 4 placed inside an induction furnace 5 are used to heat the ingredients 2 to provide a molten steel composition 6 . Optionally, the molten composition 6 is kept in a tundish (not shown) under a protective atmosphere prior to atomization.

[0083] Component 2 was chosen to provide Steel Composition 6 below.

[0084] Material

margin

C

N

Cr

Mo

Si

mn

Fe

Target

Fe

0.46

0.20

15

1

0.5

0.5

82.34

[0085] Table 1: All in % by weight

[0086] After the steel composition 6 is completely melted, it is slowly discharg...

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Abstract

There is provided a novel bearing steel composition and a method of forming a bearing. The bearing steel composition comprises: Carbon 0.4 to 0.8 wt %; Nitrogen 0.1 to 0.2 wt %; Chromium 12 to 18 wt %; Molybdenum 0.7 to 1.3 wt %; Silicon 0.3 to 1 wt %; Manganese 0.2 to 0.8 wt %; and Iron 78 to 86.3 wt %.

Description

technical field [0001] The invention relates to the field of steel and bearings. More specifically, the present invention relates to novel bearing steel compositions and methods of forming bearings. Background technique [0002] Bearings are devices that allow limited relative motion between two parts. Rolling element bearings consist of inner and outer raceways and a large number of rolling elements (balls or rollers) arranged between them. For long-term reliability and performance, it is important that the different parts have a high resistance to rolling contact fatigue, wear and creep. [0003] Modern steel is manufactured using various combinations of iron and alloying elements, depending on the desired steel product application. Chromium is a commonly used alloying element for corrosion and rust resistance. Stainless steel and surgical stainless steel contain a minimum of 10% chromium. [0004] An example of a stainless steel composition is N360 The steel cont...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/22F16C33/62
CPCB22F2998/00B22F2998/10C21D1/25C21D6/002C21D9/38C21D9/40C21D2211/001C21D2211/004C21D2211/008C22C33/0285C22C38/001C22C38/02C22C38/04C22C38/22F16C33/62F16C33/64F16C2220/20B22F3/15B22F2201/11B22F9/082B22F3/24
Inventor A.M.克里根M.谢里夫H.卡尔森
Owner AB SKF
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