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Production process of high-toughness high-wear-resistance stainless bearing steel bearing parts

A technology of stainless bearing and production process, applied in the field of metal materials, can solve the problems of high cost, long time, and inability to obtain parts with uniform structure, and achieves the effect of good toughness of the core, reducing production costs and increasing service life.

Active Publication Date: 2013-07-10
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

[0004] These methods either focus on improving the overall performance, or are time-consuming and costly, and none of them can produce parts with uniform structure and functionally graded material properties

Method used

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  • Production process of high-toughness high-wear-resistance stainless bearing steel bearing parts
  • Production process of high-toughness high-wear-resistance stainless bearing steel bearing parts
  • Production process of high-toughness high-wear-resistance stainless bearing steel bearing parts

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Embodiment Construction

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] The raw material used in the present invention is 9Cr18 or 9Cr18Mo stainless steel bearing steel that meets the national standard.

[0024] The semi-solid billet preparation device consists of a melting device, a wave-shaped inclined cold plate, and a collecting crucible, such as figure 1 Shown (1. Holding furnace; 2. Wave-shaped inclined plate; 3. Collection crucible; 4. Adjustable support; 5. Mold; 6. Solid phase; 7. Liquid phase). The specific process of billet preparation is as follows: heat the stainless bearing steel with the composition shown in Table 1 in an intermediate frequency induction furnace until it melts, and when the temperature rises to 1700°C, tilt the furnace body by adjusting the handle to make the molten steel flow through the wave-shaped inclined The cold plate is finally gathered in the collecting crucible...

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Abstract

The invention provides a production process of high-toughness high-wear-resistance stainless bearing steel bearing parts. The production process includes the steps of firstly, melting raw 9Cr18 stainless steel or 9Cr18Mo stainless steel to obtain molten steel, allowing the molten steel to flow by a slant cooling plate and flow into a collecting crucible, and allowing the molten steel to cool into semisolid blank; and secondly, thixo-forging the semisolid blank to obtain required high-toughness high-wear-resistance stainless bearing steel bearing parts. Thixo-forging is performed in the semisolid temperature zone by die forging. The surface of each part obtained by the production process is composed of high-hardness high-wear-resistance fine dendrites, the core of each part is composed of high-toughness spherical grain, and the structure property of the part functionally changes in gradient from the surface to the core. The production process includes casting and die forging only, the parts can be provided with the features of 'functional gradient material' without adding other steps, and the production cost is lowered.

Description

technical field [0001] The invention belongs to the field of metal materials, and relates to a method for preparing high-strength, high-strength, high-wear-resistant stainless bearing parts, and specifically relates to two processes of semi-solid blank preparation and thixotropic forging. Background technique [0002] With the rapid development of machinery manufacturing industry, especially automobile, aviation, atomic energy and other industries, the requirements for bearing performance are constantly increasing. According to the service conditions of shaft parts, the surface of the parts should have high wear resistance, while the core should show good strength and toughness, reflecting the characteristics of "functionally graded materials". The traditional shaft parts forming process often uses The two cannot be taken into account, and the potential of the material cannot be fully utilized. 9Cr18 / 9Cr18Mo stainless steel is a typical high-carbon chromium stainless bearin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
Inventor 宋仁伯赵翠清李亚萍王鹏
Owner UNIV OF SCI & TECH BEIJING
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