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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: 2012-06-13
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] Reference now figure 1 with 2 The manufacture of stainless steel bearings is illustrated by non-limiting examples.

[0082] Such as figure 1 As shown in the steel composition 6 is prepared in an induction furnace 5. The necessary ingredients 2 to provide the desired composition are fed into the induction furnace 5. The two electrodes 4 arranged inside the induction furnace 5 are connected to an AC power source for heating the component 2 to provide a molten steel composition 6. Optionally, the molten composition 6 is kept in a tundish (not shown) under a protective atmosphere before being atomized.

[0083] Component 2 was selected to provide the following steel composition 6.

[0084] Material

Margin

C

N

Cr

Mo

Si

Mn

Fe

aims

Fe

0.46

0.20

15

1

0.5

0.5

82.34

[0085] Table 1: All in weight%

[0086] After the steel composition 6 is completely melted, it is slowly discharged from the induction furnace 5 into the expansion chamber 10. The molten...

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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 a new bearing steel composition (steel composition) and a method of forming a bearing. Background technique [0002] Bearings are devices that allow restricted relative movement between two components. Rolling parts bearings include inner and outer raceways and a large number of rolling parts (balls or rollers) arranged between them. For long-term reliability and performance, it is important that different parts have high resistance to rolling contact fatigue, wear and creep. [0003] Depending on the desired steel product application, modern steel is manufactured using various combinations of iron and alloying elements. Chromium is a commonly used alloy 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 c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/22F16C33/62
CPCC21D9/38C21D1/25C22C33/0285B22F2998/00C21D9/40C22C38/04C21D2211/004C21D2211/001C22C38/22C21D2211/008B22F2998/10C21D6/002C22C38/02F16C33/64C22C38/001F16C33/62F16C2220/20B22F3/15B22F2201/11B22F9/082B22F3/24
Inventor A.M.克里根M.谢里夫H.卡尔森
Owner AB SKF
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