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Machining method for low-self-noise special steel

A processing method and low self-noise technology, applied in the field of metallurgy, can solve problems such as easy to rust, achieve the effects of reducing wear, reducing noise generation, and good shock absorption performance

Inactive Publication Date: 2016-08-03
唐山玉利科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the heat treatment of the steel, subsequent surface treatment is carried out to solve the problem of easy rust, and at the same time increase the wear resistance of the steel surface, reduce wear and reduce the possibility of noise

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The ratio of each element of the steel is: carbon 0.01%, chromium 13%, nickel 4%, copper 0.1%, magnesium 0.4%, manganese 1%, and the rest is iron. After conventional forging, the steel is heated to 860°C for 1 hour, and when cooled to 720°C for 2 hours; then general annealing is performed, cooled to below 550°C, and then the first preheating is to raise the temperature to 600°C and hold 2 hours; the second preheating is to raise the temperature to 800°C and keep it for 2 hours. The temperature is raised to 1220°C for 0.5 hours, and then quenched. The quenching medium is a mixture of white oil, sodium nitrate, and sodium nitrite (the mass ratio of white oil: sodium nitrate: nitrous acid is 10:3:2), and immediately after quenching For tempering, the first tempering is 560°C for 1 hour; the second tempering is 550°C for 1.5 hours; the third tempering is 560°C for 1 hour, and it is cooled to room temperature. ℃, 1.2MPa for 2 hours, then replace the water vapor with air, an...

Embodiment 2

[0026] The ratio of each element of the steel is: carbon 0.03%, chromium 17%, nickel 8%, copper 0.12%, magnesium 0.5%, manganese 1.2%, and the rest is iron. After conventional forging, the steel is heated to 880°C for 1 hour, and then cooled to 750°C for 2 hours; then general annealing is performed, cooled to below 550°C, and then the first preheating is to raise the temperature to 650°C and hold for 2 hours. hours; the second preheating is to raise the temperature to 850°C and keep it for 2 hours. The temperature is raised to 1280°C for 1 hour, and then quenched. The quenching medium is a mixture of white oil, sodium nitrate, and sodium nitrite (the mass ratio of white oil: sodium nitrate: nitrous acid is 10:3:2). Immediately after quenching For tempering, the first tempering is 560°C for 1 hour; the second tempering is 550°C for 1.5 hours; the third tempering is 560°C for 1 hour. Refrigerated to room temperature, then placed in a container filled with water vapor, kept at 1...

Embodiment 3

[0028]The ratio of each element of the steel is: carbon 0.02%, chromium 16%, nickel 6%, copper 0.1%, magnesium 0.45%, manganese 1.1%, and the rest is iron. After conventional forging, the steel is heated to 870°C for 2 hours, and then cooled to 730°C for 2 hours; then general annealing is performed, cooled to below 550°C, and then the first preheating is to raise the temperature to 620°C and hold for 2 hours. hours; the second preheating is to raise the temperature to 820°C and keep it for 2 hours. The temperature is raised to 1250°C for 1 hour, and then quenched. The quenching medium is a mixture of white oil, sodium nitrate, and sodium nitrite (the mass ratio of white oil: sodium nitrate: nitrous acid is 10:3:2). Immediately after quenching For tempering, the first tempering is 560°C for 1 hour; the second tempering is 550°C for 1.5 hours; the third tempering is 560°C for 1 hour. Refrigerated to room temperature, then placed in a container filled with water vapor, kept at 1...

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PUM

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Abstract

The invention discloses a machining method for low-self-noise special steel. Raw materials are matched, forged, subjected to heat treatment and placed in a container full of water steam to be kept for 2-4 h at the temperature ranging from 120 DEG C to 125 DEG C and under the pressure ranging from 1.2 MPa to 1.5 MPa, the water steam is replaced with air, and the low-self-noise special steel is obtained after the current state is kept for 2-4 h at the temperature ranging from 150 DEG C to 155 DEG C and under the pressure ranging from 1.2 MPa to 1.5 MPa, wherein the raw materials comprise 0.01%-0.03% of carbon, 13%-17% of chromium, 7%-8% of nickel, 0.1%-0.12% of copper, 0.4%-0.5% of magnesium, 1%-1.2% of manganese and the balance iron. According to the machining method, alloy material classes are increased, the matching is adjusted so that a finished product can contain the nickel, the chromium, the copper, the magnesium, the manganese and other elements with the reasonable matching, the abrasion resistance and corrosion resistance of the special steel are greatly improved, the special steel is easy to machine and form, good damping performance is achieved, and self-noise is low; and after the steel is subjected to heat treatment, the subsequent surface treatment is conducted, the abrasion resistance of the steel surface is improved, abrasion is reduced, and noise generation is further reduced.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a processing method of special steel. Background technique [0002] In industrial production, certain metal parts in some chemical production equipment are not only subject to wear during use, but also resistant to corrosion by nitric acid, cold phosphoric acid, organic acid, salt, and alkali solutions, so the requirements for steel are more stringent. [0003] As industries such as automobiles, home appliances, and building materials further increase the requirements for low-cost and high-corrosion resistance of the steel sheets used, major steel mills and research institutions have continuously developed new types of coated steel sheets with low cost and excellent performance. Due to its excellent corrosion resistance, zinc-aluminum-magnesium-coated steel sheets are currently being valued by large domestic and foreign steel manufacturers, household appliances, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/42C22C38/04C22C38/48C21D1/18C21D1/58C21D1/26C21D8/00
CPCC21D1/18C21D1/26C21D1/58C21D8/005C22C38/002C22C38/04C22C38/42C22C38/48
Inventor 张斌
Owner 唐山玉利科技有限公司
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