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Forging process method of m50 steel bearing ring

A process method and technology for bearing rings, which are applied in the field of forging process of M50 steel bearing rings for engines, can solve the problems of poor control of heating, cake-beating, punching, reaming and rolling and expanding processes, and poor annealing process. Reasonable and unreasonable processes, etc., to solve the technical difficulties of early cracking failure, improve the distribution and morphology of primary carbides, and extend the endurance.

Active Publication Date: 2019-02-22
辽宁银捷装备科技股份有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] According to the defects caused by the working surface of the raceway of the bearing matrix, the analysis results: the forging process of the bearing ring forging is unreasonable, the control of the heating, cake making, punching, reaming and rolling process is not strict, and the annealing process is unreasonable and other reasons

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  • Forging process method of m50 steel bearing ring
  • Forging process method of m50 steel bearing ring
  • Forging process method of m50 steel bearing ring

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Embodiment Construction

[0020] Below in conjunction with accompanying drawing, the present invention is described further:

[0021] The material is imported M50 high temperature bearings for testing.

[0022] First of all, preheat the molds such as blank molds, rolling wheels, mandrels and other auxiliary tools to 150-300°C before billet making, and keep the temperature at 150-300°C throughout the production process, which cannot be lowered;

[0023] Secondly, preheat the billet from room temperature to 810-850°C, hold the heat for Φ×1.0min, raise the temperature to 1200±10°C, hold the heat for Φ×0.8min, and hold the ring billet for the second time to return to the furnace for Φ×0.6min. The billet is made on the principle of being out of the furnace. The striking force of the billet is 750kg. The preheating temperature of the hammer and anvil is >150°C. The free end is used to make cakes and the end face is blind punched, the other side is shadow punched to expand holes, double-sided hole is expanded...

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Abstract

The invention discloses a forging process for bearing rings made of M50 steel. The forging process comprises the steps of preheating, heating, temperature rising, forging, ash cooling, annealing and detection, wherein in the preheating step, tools and molds are preheated to 150-300 DEG C before blank making; in the heating step, manufactured blanks are heated to 810-850 DEG C from the normal temperature; and in the temperature rising process, the manufactured blanks and rolling rings are heated to 1120+ / -10 DEG C. Through inspection of forged pieces and machined products, the grain size of the products manufactured through the process after quenching reaches the third level (the standard being the second to fourth level), the mixed grain phenomenon is avoided, all the products are qualified after being subjected to water leaching and ultrasonic flaw detection of 0.4+16.5db-0.4+18db, and the hardness of the forged pieces is 210-225 HB. The technical requirements and application requirements for the products are met completely, the service life of bearings is substantially prolonged, and the endurance capability of engines is substantially improved and can reach more than 500 hours to the highest degree.

Description

technical field [0001] The invention relates to a forging process for a bearing ring, in particular to a forging process for an M50 steel bearing ring for an engine. Background technique [0002] The service life of an aerospace engine directly affects the endurance of the aircraft and determines the key components of the engine performance, one of which is the engine main shaft bearing. For the main shaft bearing of the new turbofan engine, due to its very harsh working environment, the performance requirements of the bearing are very high in all aspects. The product quality must meet the requirements of its use in order to ensure the normal flight and long-term endurance of the aircraft. One of the keys to engine performance is the quality of the main shaft bearings. [0003] The engine failure problem is mainly manifested in the cracking and peeling of the working surface of the roller table of the main shaft bearing, and the early failure of the bearing, which leads to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21K1/04C21D9/40C21D1/26
CPCB21K1/04C21D1/26C21D9/40Y02P10/20
Inventor 谭叶林王兆和王宝张功让
Owner 辽宁银捷装备科技股份有限公司
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