A kind of 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 chloride stress corrosion resistance, weak chemical corrosion resistance, easy corrosion, etc., and achieve the effect of good mechanical properties and high composition uniformity.

Active Publication Date: 2021-11-09
丽水市正阳电力设计院有限公司 +1
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  • Abstract
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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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  • A kind of preparation method of corrosion-resistant austenitic stainless steel
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  • A kind of preparation method of corrosion-resistant austenitic stainless steel

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Embodiment 1

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

[0057] 1) Use alloys or simple metals as raw materials to smelt and configure molten steel. The composition of molten steel is shown in Table 1 below:

[0058] Table 1: Liquid steel composition list

[0059]

[0060] Fe in the table means iron element and unavoidable impurities;

[0061] 2) Add Q195 low-carbon steel by feeding silicon-calcium wire. The amount of low-carbon steel added is 0.55kg / t molten steel, and then continuous casting is carried out. The continuous casting tundish adopts a tundish liquid level of 460-470mm to obtain continuous casting slab;

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

Embodiment 2

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

[0065] 1) Use alloys or simple metals as raw materials to smelt and configure molten steel. The composition of molten steel is shown in Table 2 below:

[0066] Table 2: Liquid steel composition list

[0067]

[0068] Fe in the table means iron element and unavoidable impurities;

[0069] 2) Add Q195 low-carbon steel by feeding silicon-calcium wire. The amount of low-carbon steel added is 0.6kg / t molten steel, and then continuous casting is carried out. The continuous casting tundish adopts a tundish liquid level of 460-470mm to obtain continuous casting slab;

[0070] 3) Preheat the continuous casting slab. During the preheating process, the temperature is first raised to 380°C at a rate of 10°C / min, then raised to 680°C at a rate of 20°C / min, and then raised to 780°C at a rate of 10°C / min, and kept for 20 minutes , hot-rolled at 850°C to a steel coil with a thickness o...

Embodiment 3

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

[0073] 1) Use alloys or simple metals as raw materials to smelt and configure molten steel. The composition of molten steel is shown in Table 3 below:

[0074] Table 3: Liquid steel composition list

[0075]

[0076] Fe in the table means iron element and unavoidable impurities;

[0077] 2) Add Q195 low-carbon steel by feeding silicon-calcium wire. The amount of low-carbon steel added is 0.5kg / t molten steel, and then continuous casting is carried out. The continuous casting tundish adopts a tundish liquid level of 460-470mm to obtain continuous casting slab;

[0078] 3) Preheat the continuous casting slab. During the preheating process, the temperature is first raised to 380°C at a rate of 5°C / min, then raised to 680°C at a rate of 20°C / min, and then raised to 760°C at a rate of 8°C / min, and kept for 15 minutes , 820°C hot-rolled into a steel coil with a thickness of 2...

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Abstract

The invention belongs to the field of metallurgy, in particular to a method for preparing corrosion-resistant austenitic stainless steel. The method comprises: smelting the alloy or simple metal to obtain molten steel, the molten steel contains: 19.0wt%≤Cr≤21.0wt%, 4.0wt%≤C≤4.5wt%, 8.0wt%≤Ni≤10.5wt%, 6.0wt% wt%≤Mn≤7.5wt%, 0.6wt%≤Cu≤1.5wt%, 1.2wt%≤Co≤1.8wt%, 0.8wt%≤Si≤1.1wt%, 0.2wt%≤V≤0.3wt%, I Measure Fe; perform continuous casting to obtain continuous casting slab; preheat, form and heat treat the continuous casting slab to obtain corrosion-resistant austenitic stainless steel. The invention prepares the austenitic stainless steel with stronger chloride corrosion resistance, which fills up the technical blank of the high-carbon austenitic stainless steel.

Description

technical field [0001] The invention belongs to the field of metallurgy, in particular to a method for preparing corrosion-resistant austenitic stainless steel. Background technique [0002] Stainless steel (Stainless Steel) is the abbreviation of stainless acid-resistant steel, which is resistant to weak corrosive media such as air, steam and water, or has stainless steel grades called stainless steel, and some stainless steels can also be resistant to chemical corrosion media after further treatment. (such as acid, alkali, salt and other chemical attack) corrosion. [0003] Therefore, the application range of stainless steel is very wide, it can be used for nitric acid and food factory equipment, making parts working at high temperature, corrosion-resistant containers and equipment linings, pipelines, nitric acid-resistant equipment parts, pharmaceutical machinery, etc., and in It is also widely used in power facilities. [0004] As a common type of stainless steel, aust...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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