阅读说明：本技术 一种防锈400系列不锈钢及其制备方法和应用 (Antirust 400 series stainless steel and preparation method and application thereof ) 是由 何培忠 于 2019-11-27 设计创作，主要内容包括：本发明涉及合金技术领域,提供了一种防锈400系列不锈钢及其制备方法和应用,所述制备方法包括以下步骤：通过对400系列不锈钢依次进行加热、降温和镀膜处理,有效提高了400系列不锈钢的防锈效果。本发明经过上述处理后的400系列不锈钢的防锈性能与300系列奥氏体不锈钢的防锈性能相当,而400系列不锈钢的价格每吨比300系列合金的价格低7000～8000元,因此本发明提供的方法在提高400系列不锈钢防锈性能的同时,有利于降低成本。而且本发明提供的方法无需使用酸碱溶剂,有利于保护环境。(The invention relates to the technical field of alloy, and provides antirust 400 series stainless steel and a preparation method and application thereof, wherein the preparation method comprises the following steps: through heating, cooling and coating film processing to 400 series stainless steel in proper order, effectively improved 400 series stainless steel's antirust effect. The rust-proof performance of the 400 series stainless steel after the treatment is equivalent to that of the 300 series austenitic stainless steel, and the price of the 400 series stainless steel is 7000-8000 yuan lower than that of the 300 series alloy per ton, so that the method provided by the invention is beneficial to reducing the cost while improving the rust-proof performance of the 400 series stainless steel. In addition, the method provided by the invention does not need acid-base solvents, and is beneficial to environmental protection.)

1. A preparation method of rustproof 400 series stainless steel comprises the following steps:

and sequentially heating, cooling and coating the 400 series stainless steel to obtain the antirust 400 series stainless steel.

2. The method of manufacturing of claim 1, wherein the 400 series stainless steel comprises 430 stainless steel, 410 stainless steel, 420 stainless steel, or 409L stainless steel.

3. The method according to claim 1, wherein the heating temperature is 900 to 1100 ℃, the heating time is determined by the hardness of the 400-series stainless steel after heating, and the heating is stopped when the Vickers hardness of the 400-series stainless steel after heating is 130 to 210, and the heating is performed under a protective atmosphere.

4. The preparation method according to claim 1, wherein the final temperature of the temperature reduction is 20 to 50 ℃.

5. The method according to claim 1, wherein the coating treatment is a plasma sputtering coating, and the coating layer obtained by the coating treatment comprises one or more of chromium, nickel, zirconium and carbon.

6. The production method according to claim 1, wherein the plating thickness obtained by the plating treatment is 5 μm to 70 μm.

7. The production method according to claim 1, wherein the coating treatment is performed under vacuum conditions.

8. The rustproof 400-series stainless steel prepared by the method of any one of claims 1 to 7, wherein the rustproof 400-series stainless steel consists of 400-series stainless steel and a coating, and the coating comprises one or more of chromium, nickel, zirconium and carbon.

9. Use of the rustproof 400-series stainless steel according to claim 8 for the preparation of battery cases.

Technical Field

The invention relates to the field of alloys, in particular to rustproof 400 series stainless steel and a preparation method and application thereof.

Background

The 400 series stainless steel is an alloy of iron, carbon and chromium. Because it does not contain nickel, it is a nickel-saving stainless steel, also known as stainless iron. The 400 series stainless steel has strong high-temperature oxidation resistance, and the physical property and the mechanical property of the 400 series stainless steel are further improved compared with carbon steel.

The 400 series stainless steel mainly comprises ferrite and martensite, and the commonly used 400 series stainless steel is 430, 410, 420, 409L and the like, wherein the 430 stainless steel is used in the largest amount. The chromium content in the 430 stainless steel is 18%, and the stainless steel is characterized by low price and small thermal expansion coefficient; but the defects are relatively obvious: the rust inhibitive performance is lower than that of 300 series stainless steel, so that the application range of 400 series stainless steel is limited.

Disclosure of Invention

The invention provides rustproof 400 series stainless steel, a preparation method and application thereof, and the method provided by the invention can effectively improve the rustproof performance of the 400 series stainless steel.

The invention provides a preparation method of antirust 400 series stainless steel, which comprises the following steps:

and sequentially heating, cooling and coating the 400 series stainless steel to obtain the antirust 400 series stainless steel.

Preferably, the 400 series stainless steel comprises 430 stainless steel, 410 stainless steel, 420 stainless steel, or 409L stainless steel.

Preferably, the heating temperature is 900-1100 ℃, the heating time is determined by the hardness of the heated 400 series stainless steel, and when the Vickers hardness of the heated 400 series stainless steel is 130-210, the heating is stopped, and the heating is carried out under a protective atmosphere.

Preferably, the final temperature of the temperature reduction is 20-50 ℃.

Preferably, the coating treatment is plasma sputtering coating, and the coating layer obtained by the coating treatment comprises one or more of chromium, nickel, zirconium and carbon.

Preferably, the thickness of the plating layer obtained by the plating treatment is 5-70 μm.

Preferably, the plating treatment is performed under vacuum conditions.

The invention also provides the rustproof 400 series stainless steel prepared by the method in the technical scheme, wherein the rustproof 400 series stainless steel consists of 400 series stainless steel and a plating layer, and the plating layer comprises one or more of chromium, nickel, zirconium and carbon.

The invention also provides application of the rustproof 400 series stainless steel in the technical scheme in preparation of battery cases.

The invention provides a preparation method of rustproof 400 series stainless steel, which effectively improves the rustproof effect of the 400 series stainless steel by sequentially heating, cooling and coating the 400 series stainless steel. The rust-proof performance of the 400 series stainless steel treated by the method is equivalent to that of the 300 series austenitic stainless steel, and the price of the 400 series stainless steel is 7000-8000 yuan lower than that of the 300 series alloy per ton, so that the method provided by the invention is beneficial to reducing the cost while improving the rust-proof performance of the 400 series stainless steel. In addition, the method provided by the invention does not need acid-base solvents, and is beneficial to environmental protection.

Detailed Description

The invention provides a preparation method of antirust 400 series stainless steel, which comprises the following steps:

and sequentially heating, cooling and coating the 400 series stainless steel to obtain the antirust 400 series stainless steel.

The invention carries out heat treatment on 400 series stainless steel. In the invention, the 400 series stainless steel preferably comprises 430 stainless steel, 410 stainless steel, 420 stainless steel or 409L stainless steel, the heating temperature is preferably 900-1100 ℃, more preferably 950-1050 ℃, the heating time is determined by the hardness of the 400 series stainless steel after heating, and when the Vickers hardness of the 400 series stainless steel after heating is preferably 130-210, the heating is stopped; the heating is preferably carried out in a protective atmosphere, preferably a vacuum or preferably an atmosphere of nitrogen and hydrogen generated by the decomposition of ammonia.

After the heating treatment is finished, the heated 400 series stainless steel is subjected to cooling treatment, and the final temperature of the cooling treatment is preferably 20-50 ℃, and more preferably 30-40 ℃.

After the temperature reduction treatment is finished, the invention carries out film coating treatment on the 400 series stainless steel after the temperature reduction treatment. In the present invention, the coating treatment is preferably a plasma sputtering coating, and the present invention does not particularly require a specific embodiment of the plasma sputtering coating, and may be implemented by a method known to those skilled in the art. In the invention, the components of the coating layer obtained by the coating treatment preferably comprise one or more of chromium, nickel, zirconium and carbon, and the chromium, nickel, zirconium and carbon are beneficial to improving the antirust property of the metal surface. In the invention, the target material is preferably set to be chromium, nickel, zirconium and carbon so as to obtain a coating film containing chromium, nickel, zirconium and carbon; when the plating film contains one or more of chromium, nickel, zirconium, and carbon, it is preferable in the present invention that one or more targets are provided at the same time, and a plurality of targets are sputtered at the same time to obtain a plating film containing one or more components. In the present invention, when the plating film contains a plurality of components, the present invention does not particularly require a content ratio relationship between the plurality of components, and any ratio may be used.

In the present invention, the thickness of the plated layer obtained by the plating treatment is preferably 5 to 70 μm, more preferably 5 to 50 μm, and still more preferably 10 to 30 μm. The invention preferably controls the thickness of the coating layer within the range, which is beneficial to improving the rust resistance of the 400 series stainless steel. In the present invention, the plating treatment is preferably performed under vacuum conditions. In the invention, the coating treatment adopts a vacuum plasma coating system in patent CN201720479833.X to carry out coating.

The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention.