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Preparation method of ultra-pure G102Cr18Mo stainless bearing steel

A stainless bearing, ultra-pure technology, applied in the direction of furnace type, furnace, electric furnace, etc., can solve the problems of poor purity of inclusion content, etc., to achieve the goal of improving purity, reducing oxygen content and inclusion content, and reducing oxygen content Effect

Active Publication Date: 2021-07-09
ANHUI FUKAI STAINLESS STEEL
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of ultra-pure G102Cr18Mo stainless bearing steel in view of the technical problems of high inclusion content and poor purity in G102Cr18Mo stainless bearing steel in the prior art; the present invention is smelted by intermediate frequency furnace , LF furnace refining, calming treatment and die casting to obtain the base metal required for the preparation of ultra-pure G102Cr18Mo stainless bearing steel, and the entire smelting process can ensure the composition of subsequent target products while effectively reducing the oxygen content in the base material, which is convenient Subsequent vacuum induction melting, refining and double vacuum self-consumption remelting are carried out on the base metal, so as to effectively reduce the oxygen content and inclusion content in the steel ingot, and improve the purity of G102Cr18Mo stainless bearing steel

Method used

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Embodiment

[0037]The preparation method of ultrapure G102CR18MO stainless bearing steel is prepared by the present embodiment.

[0038] Step 1, 260 parts of the raw materials, 6 parts of metal molybdenum, 734 industrial pure iron, and the raw materials are melted by the medium frequency furnace.

[0039] Specifically, when the raw material is melted in the medium band, the slag surface is added to the slag, and the ingredient of the residue is: FeO 30-35%; SiO 2 35-40%; CaO 30-35%, the aluminum oxidation is removed by FEO in the residue, and the aluminum content in the steel solution is reduced.

[0040] It is worth mentioning that although the raw material is medium carbon chromium iron, metal molybdenum, industrial pure iron, but inevitable will contain a certain amount of impurity aluminum, due to the presence of aluminum, the latex effect and increase the content of inclusions, Aluminum oxidation is removed by FeO in the formation of the slag.

[0041] It is worth noting that since Feo i...

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Abstract

The invention discloses a preparation method of ultra-pure G102Cr18Mo stainless bearing steel, and belongs to the technical field of metal smelting. According to the method, firstly, base metal needed for preparing the ultra-pure G102Cr18Mo stainless bearing steel is obtained through intermediate frequency furnace smelting, LF furnace refining, sedation treatment and die casting, the oxygen content ranges from 20 ppm to 30 ppm, and conditions are created for ultra-pure stainless steel bearing steel smelting; then, the base metal is subjected to forging and scaling treatment and then is put into a vacuum induction furnace to be melted and refined, and no alloy element is added in the vacuum induction treatment process; a consumable electrode subjected to vacuum induction melting is subjected to vacuum consumable remelting twice, and the G102Cr18Mo stainless bearing steel with extremely high purity can be obtained.

Description

Technical field [0001] The present invention relates to the field of metal smelting technology, and more particularly to a method for preparing ultrapure G102CR18MO stainless bearing steel. Background technique [0002] G102CR18MO is a high-carbon chrome stainless steel for making a bearing ring and a rolling body, which is suitable for bearing in water, river, nitric acid, steam, and marine-like corrosion, bearing, oil and chemical machinery in ships, submersible pump components. Bearings, nautical instrument bearings, etc. In order to improve the fatigue life of the bearing, increase the pureness of G102Cr18MO stainless steel, especially to reduce its overall oxygen content. At present, in G102CR18MO smelting process, it is often carried out by electric arc furnace + furnace refining + electric slag, and occasionally some enterprises use vacuum self-consuming methods, but its product is high, and the inclusion size is more Large, poor pureness. [0003] Afterwards, China Patent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/52C21C5/56C21C7/06C21C7/064C21C7/10
CPCC21C5/5241C21C5/56C21C7/06C21C7/064C21C7/10
Inventor 徐涛马红军冯昊苏舒美良王鹏韩继鹏常立忠陆明新黄日圣章静能
Owner ANHUI FUKAI STAINLESS STEEL
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