Novel stainless bearing steel and method for manufacturing same

A technology of stainless steel bearings and manufacturing methods, applied in the field of stainless steel, to achieve the effects of excellent mechanical properties, high hardness, and strong corrosion resistance

Inactive Publication Date: 2008-02-06
SHANGHAI RES INST OF MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the above-mentioned stainless bearing steels have been popularized and applied in certain environments, they all have certain limitations, and it is necessary to research and develop new stainless bearing steels with a wide range of applications.

Method used

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  • Novel stainless bearing steel and method for manufacturing same

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A new type of stainless bearing steel, the bearing steel contains: C 0.42 (weight percent, the same below), Cr 15.52, Ni 0.78, Mo 1.64, N 0.12, Mn 0.74, Si 0.26, S 0.006, P 0.020, V 0.34, The rest is Fe; the manufacturing method of the bearing steel is as follows: the charge containing the above components is smelted in a non-vacuum induction furnace, electroslag remelted, forged and formed, and then subjected to the following heat treatment process: heat preservation at 1030 ° C for 1 hour, water quenching to room temperature, and then at 180 ° C for 4 hours to obtain stainless bearing steel. The obtained stainless bearing steel is processed into a plunger, installed in a pressure cylinder of medical equipment, and used in a microbial solution for 412 hours. The wear resistance and corrosion resistance of the plunger meet the technical requirements of product design.

[0035] Previously, the plunger used the following materials, which did not work well:

[0036] 1. GC...

Embodiment 2

[0041] A new type of stainless bearing steel, the bearing steel contains: C 0.52, Cr 15.49, Ni 0.29, Mo 1.90, N 0.21, Mn 0.63, Si 0.42, S 0.004, P 0.024, V 0.31, and the rest is Fe; The manufacturing method of the bearing steel is as follows: the charge containing the above components is smelted in a non-vacuum induction furnace, electroslag remelted, forged into a bar, softened and annealed, rough-processed into the inner and outer rings of the bearing, and then subjected to the following heat treatment process: in 1010 Insulate at ℃ for 1 hour, freeze after oil quenching (8 hours at -30 ℃), and then hold at 180 ℃ for 4 hours. The measured hardness is HRC56. The assembled bearings did not appear rusted in the 5% NaCl salt spray test, while the 9Cr18 stainless steel bearings appeared rusted within 24 hours under the same test conditions.

Embodiment 3

[0043] A new type of stainless bearing steel, which contains: C 0.30, Cr 14.00, Ni 1.50, Mo 1.00, N 0.10, Mn 1.00, Si 1.00, S 0.03, P 0.035, Ti 0.50, and the rest is Fe; The manufacturing method of the bearing steel is as follows: the charge containing the above components is smelted in a non-vacuum induction furnace, electroslag remelted, forged and formed, and then subjected to the following heat treatment process: heat preservation at 1050 ° C for 0.5 h, water quenching to room temperature, and then at 150 ° C After heat preservation for 6 hours, a stainless bearing steel was obtained, the measured flexural strength was 3800MPa, and the hardness was HRC55.

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Abstract

The present invention relates to a novel stainless bearing steel and the making method with a weight percentage of components as follows: C 0.3-0.6 percent, Cr 14.00-17.00 percent, Ni 0.29-2.50 percent, Mo 1.00-3.00 percent, N 0.10-0.30 percent, Mn less than or equal to 1.00 percent, Si less than or equal to 1.00 percent, S less than or equal to 0.03 percent, P less than or equal to 0.035 percent, trace element less than or equal to 0.50 percent and the remainder is Fe. Compared with the prior art, the novel stainless bearing steel has an excellent mechanical property, wearing resistance performance and processing performance, is high in hardness, powerful in wearing resistance, suitable for moderate corrosive surroundings such as oceans, petroleum, chemical engineering, foodstuff, paper making and so on and is convenient for manufacturing rolling and sliding bearings of various types.

Description

technical field [0001] The invention relates to a stainless steel, in particular to a novel stainless bearing steel and a manufacturing method thereof. Background technique [0002] Bearings are typical general-purpose mechanical parts, and their application scope almost involves the entire national economy and national defense fields. In different application environments, the performance requirements for bearing materials are also different. For example, in corrosive environments such as marine development and petrochemical industry, in addition to requiring materials to have high mechanical properties and high processing properties, they are also required to have high durability. Corrosion properties, resulting in stainless bearing steel. [0003] At present, most of the stainless bearing steels are made of ordinary stainless steel, and the most used are 9Cr18 and 9Cr18Mo. They have high hardness, which can reach more than HRC60, and can be used in atmosphere, river wate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/44C22C38/46C22C38/48C22C38/50C22C33/04C21D1/18
Inventor 沈忠良薛春徐增华黄春波
Owner SHANGHAI RES INST OF MATERIALS CO LTD
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