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A smelting method for controlling the oxygen content of 9cr18mo bearing stainless steel

A smelting method and technology of oxygen content, which is applied in the smelting field of controlling the oxygen content of 9Cr18Mo bearing stainless steel, can solve the problems such as the difficulty in reducing the oxygen content of steel, and achieve the effects of reducing heat energy loss, shortening oxidation time, and wide technical coverage

Active Publication Date: 2022-04-26
ANHUI FUKAI STAINLESS STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a smelting method for controlling the oxygen content of 9Cr18Mo bearing stainless steel, so as to solve the technical problem that the oxygen content of the steel is difficult to reduce in the prior art

Method used

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  • A smelting method for controlling the oxygen content of 9cr18mo bearing stainless steel
  • A smelting method for controlling the oxygen content of 9cr18mo bearing stainless steel
  • A smelting method for controlling the oxygen content of 9cr18mo bearing stainless steel

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Embodiment 1

[0027] to combine Figure 1-3 , this embodiment provides a high-efficiency smelting device for alloy steel, including two vacuum tanks 1 and a base 2, the two vacuum tanks 1 and the base 2 are distributed in an isosceles right-angled triangle structure on the horizontal plane, and the base 2 is in an isosceles At the position of the right-angle point in the right-angled triangle structure, the top of the base 2 is fixed with a rotating device 3. The rotating device 3 can be a turntable structure driven by a motor through gear meshing. It only needs to be able to drive the equipment on it to rotate. ; the top of the rotating device 3 is fixedly installed with a vertical support structure 4 (for structures such as struts), and the top of the vertical support structure 4 is connected with the first horizontal support structure 5 perpendicular to it (in this embodiment, specifically One end of the horizontal plate), and the other end of the first horizontal support structure 5 is ...

Embodiment 2

[0036] This embodiment provides a smelting method for controlling the oxygen content of 9Cr18Mo bearing stainless steel. The method specifically uses the high-efficiency smelting device provided in Example 1 to carry out smelting according to the following steps:

[0037] Step 1. Equipment layout

[0038] That is, the equipment shown in Example 1 is arranged, and the two vacuum tanks 1 are numbered and are respectively No. 1 tank and No. 2 tank. Initially, the ladle water-cooled furnace cover 7 is arranged above the No. Insert into the No. 2 tank;

[0039] Step 2. After the equipment layout is completed, after electric arc furnace melting and AOD furnace refining, the composition ratio of 9Cr18Mo bearing stainless steel reaches: C: 0.95~1.10%, Mn: ≤0.8%, Si: ≤0.8%, Cr: 16.0~ 18.0%, Ni: ≤0.60%, Mo: ≤0.75%, P≤: 0.04%, S: ≤0.03%, the total oxygen content in molten steel is controlled within the range of 40-50ppm;

[0040] Step 3. Mix the molten steel smelted in the AOD furnace ...

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Abstract

The invention discloses a smelting method for controlling the oxygen content of 9Cr18Mo bearing stainless steel, which relates to the technical field of metal smelting, and adopts two vacuum tanks, a base, a rotating device, multiple supporting structures, a ladle water-cooled furnace cover, multiple driving devices, a vacuum The air extraction device, guide rail, frame guide rail car, etc. constitute a circulation system, which realizes the process integration of LF furnace and VD vacuum furnace, and uses the integrated equipment to produce 9Cr18Mo bearing stainless steel, which effectively shortens the transfer time and transfer of ladles. The heat energy loss and oxidation time in the process effectively reduce the oxygen content of the obtained 9Cr18Mo bearing stainless steel.

Description

technical field [0001] The invention relates to the technical field of metal smelting, in particular to a smelting method for controlling the oxygen content of 9Cr18Mo bearing stainless steel. Background technique [0002] With the increase of bearing capacity, rotation speed, service life and reliability, especially the bearings used in aerospace, precision machine tools, nuclear power and oil drilling and other fields should have higher load capacity, temperature resistance, corrosion resistance and wear resistance , low noise and ultra-long contact fatigue life and other properties require stricter control over the structure and performance of bearing stainless steel. It is necessary to continuously improve the process to produce high strength, high fracture toughness, wear resistance, corrosion resistance, temperature resistance and high fatigue strength. Stainless steel for extra long service life bearings. [0003] 9Cr18Mo stainless steel is a high-carbon chromium sta...

Claims

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Application Information

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IPC IPC(8): C22C33/04C22C38/02C22C38/04C22C38/44C21C7/10
CPCC22C33/04C22C38/02C22C38/04C22C38/44C21C7/10
Inventor 赵跃胜吴振忠林心炳陈伟生舒美良郑仁波汪天玉
Owner ANHUI FUKAI STAINLESS STEEL
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