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Preparation method of corrosion-resistant austenitic stainless steel

An austenitic stainless steel, corrosion-resistant technology, applied in the metallurgical field, can solve the problems of easy corrosion, chloride stress corrosion resistance, weak chemical corrosion ability, etc., achieve uniform composition, good mechanical properties, improved strength and chloride resistance. Effect of Corrosive Ability

Active Publication Date: 2020-12-01
丽水市正阳电力设计院有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the existing technology, there is no perfect preparation scheme for high-carbon corrosion-resistant austenitic stainless steel, and austenitic stainless steel generally has weak resistance to chloride stress corrosion / chemical corrosion. In some special environment power equipment, The problem of easy corrosion, the invention provides a preparation method of corrosion-resistant austenitic stainless steel

Method used

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  • Preparation method of corrosion-resistant austenitic stainless steel

Examples

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Embodiment 1

[0056]A method for preparing corrosion-resistant austenitic stainless steel, the method comprising:

[0057]1) Use alloy or simple metal as raw materials to prepare molten steel. The composition of molten steel is shown in Table 1 below:

[0058]Table 1: Composition table of molten steel

[0059]

[0060]Fe in the table represents iron element and inevitable impurities;

[0061]2) Add Q195 low carbon steel by feeding silicon-calcium wire. The addition amount of low carbon steel is 0.55kg / t molten steel, and then continuous casting is carried out. The continuous casting tundish adopts the tundish liquid level to ensure that the liquid level is 460~470mm. Continuous casting billet

[0062]3) Preheat the continuous casting billet. During the preheating process, the temperature is raised to 380°C at a rate of 5°C / min, then to 680°C at a rate of 15°C / min, and then to 760°C at a rate of 5°C / min, and the temperature is kept for 20 minutes. , 830℃ hot-rolled into a steel coil with a thickness of 2.8mm and a ...

Embodiment 2

[0064]A method for preparing corrosion-resistant austenitic stainless steel, the method comprising:

[0065]1) Use alloy or simple metal as raw materials to prepare molten steel. The composition of molten steel is shown in Table 2 below:

[0066]Table 2: Composition table of molten steel

[0067]

[0068]Fe in the table represents iron element and inevitable impurities;

[0069]2) Add Q195 low carbon steel by feeding silicon calcium wire. The addition amount of low carbon steel is 0.6kg / t molten steel, and then continuous casting is carried out. The continuous casting tundish adopts the tundish liquid level to ensure that the liquid level is 460~470mm. Continuous casting billet

[0070]3) Preheat the continuous casting billet. In the preheating process, the temperature is increased to 380°C at a rate of 10°C / min, then to 680°C at a rate of 20°C / min, and then to 780°C at a rate of 10°C / min, and the temperature is kept for 20 minutes. , 850℃ hot-rolled into a steel coil with a thickness of 2.8mm and a ...

Embodiment 3

[0072]A method for preparing corrosion-resistant austenitic stainless steel, the method comprising:

[0073]1) Use alloy or simple metal as raw materials to prepare molten steel. The composition of molten steel is shown in Table 3 below:

[0074]Table 3: Composition table of molten steel

[0075]

[0076]Fe in the table represents iron element and inevitable impurities;

[0077]2) Add Q195 low carbon steel by feeding silicon-calcium wire. The adding amount of low carbon steel is 0.5kg / t molten steel, and then continuous casting is carried out. The continuous casting tundish adopts the tundish liquid level to ensure that the liquid level is 460~470mm. Continuous casting billet

[0078]3) Preheat the continuous casting billet. During the preheating process, the temperature is raised to 380°C at a rate of 5°C / min, then to 680°C at a rate of 20°C / min, and then to 760°C at 8°C / min, and the temperature is kept for 15 minutes. , 820℃ hot-rolled into a steel coil with a thickness of 2.8mm and a width of 1100...

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Abstract

The invention belongs to the field of metallurgy and particularly relates to a preparation method of corrosion-resistant austenitic stainless steel. The method comprises the following steps of smelting an alloy or a metal simple substance to obtain molten steel, wherein the molten steel contains components of Cr, C, Ni, Mn, Cu, Co, Si, V and Fe, Cr is greater than or equal to 19.0wt% and less thanor equal to 21.0wt%, C is greater than or equal to 4.0wt% and less than or equal to 4.5wt%, Ni is greater than or equal to 8.0wt% and less than or equal to 10.5wt%, Mn is greater than or equal to 6.0wt% and less than or equal to 7.5wt%, Cu is greater than or equal to 0.6wt% and less than or equal to 1.5wt%, Co is greater than or equal to 1.2wt% and less than or equal to 1.8wt%, Si is greater thanor equal to 0.8wt% and less than or equal to 1.1wt%, V is greater than or equal to 0.2wt% and less than or equal to 0.3wt%, and the balance is Fe; performing continuous casting to obtain a continuouscasting billet; and preheating, forming and thermally treating the continuous casting billet to obtain the corrosion-resistant austenitic stainless steel. According to the preparation method, the austenitic stainless steel with higher chloride corrosion resistance is prepared, and the technical gap of high-carbon austenitic stainless steel is filled.

Description

Technical field[0001]The invention belongs to the field of metallurgy, and particularly relates to a preparation method of corrosion-resistant austenitic stainless steel.Background technique[0002]Stainless steel is the abbreviation of stainless and acid-resistant steel. It is resistant to weak corrosive media such as air, steam and water, or stainless steel is called stainless steel, and some stainless steels can also be resistant to chemical corrosion media after further treatment (Such as acid, alkali, salt, etc.) corrosion.[0003]Therefore, stainless steel has a very wide range of applications. It can be used in nitric acid and food factory equipment, parts that work at high temperatures, corrosion-resistant containers and equipment linings, pipelines, nitric acid-resistant equipment parts, pharmaceutical machinery, etc. It is also widely used in power facilities.[0004]As a common type of stainless steel, austenitic stainless steel has good comprehensive properties and can withsta...

Claims

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Application Information

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IPC IPC(8): C22C33/04C22C38/02C22C38/42C22C38/46C22C38/52C22C38/56C22C38/58C21D1/26C21D6/00
CPCC21D1/26C21D6/004C21D6/005C21D6/008C21D2211/001C22C33/04C22C38/02C22C38/42C22C38/46C22C38/52C22C38/56C22C38/58
Inventor 吴群雄林和李晓军邱少平谷振山郑众安黄耀陈枫唐谊平
Owner 丽水市正阳电力设计院有限公司
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