Processing method of high-strength, corrosion-resistant and fatigue-resistant nano/ultra-fine grain 304 stainless steel

A technology of 304 stainless steel and processing method, which is applied in the field of corrosion resistance and anti-fatigue nano/ultra-fine grain 304 stainless steel processing and high strength

Pending Publication Date: 2022-04-22
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, so far, there is no processing or treatment process that can simultaneously improve the tensile properties, strain fatigue resistance and corrosion resistance of 304 stainless steel.

Method used

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  • Processing method of high-strength, corrosion-resistant and fatigue-resistant nano/ultra-fine grain 304 stainless steel
  • Processing method of high-strength, corrosion-resistant and fatigue-resistant nano/ultra-fine grain 304 stainless steel
  • Processing method of high-strength, corrosion-resistant and fatigue-resistant nano/ultra-fine grain 304 stainless steel

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Experimental program
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Effect test

Embodiment 1

[0051] In this embodiment, a high-strength, corrosion-resistant and fatigue-resistant nano / ultra-fine grain 304 stainless steel processing method, the process steps are as follows:

[0052] Step S1: remove scale and other sundries on the surface of common 304 stainless steel.

[0053] Step S2: Homogenization heat treatment of ordinary 304 stainless steel: heat preservation at 1050° C. for 3 hours.

[0054] Step S3: the rolling temperature and deformation rate of the first pass are 1000° C. and 25% respectively.

[0055] Step S4: The rolling temperature and deformation rate of the second pass are 900° C. and 20%, respectively.

[0056] Step S5: The rolling temperature and deformation rate of the third pass are 800°C and 15%, respectively.

[0057] Step S6: The rolling temperature and deformation rate of the fourth pass are 750° C. and 10% respectively, and the rolling temperature and deformation rate of the fifth pass are 700° C. and 10% respectively.

[0058] Step S7: the f...

Embodiment 2

[0061] In this embodiment, a high-strength, corrosion-resistant and fatigue-resistant nano / ultra-fine grain 304 stainless steel processing method, the process steps are as follows:

[0062] Step S1: remove scale and other sundries on the surface of common 304 stainless steel.

[0063] Step S2: Homogenization heat treatment of ordinary 304 stainless steel: heat preservation at 1000° C. for 6 hours.

[0064] Step S3: the rolling temperature and deformation rate of the first pass are 900° C. and 20%, respectively.

[0065] Step S4: The rolling temperature and deformation rate of the second pass are 800° C. and 10%, respectively.

[0066] Step S5: The rolling temperature and deformation rate of the third pass are 700° C. and 10% respectively.

[0067] Step S6: the rolling temperature and deformation rate of the fourth pass are 650°C and 15% respectively, and the rolling temperature and deformation rate of the fifth pass are 600°C and 15% respectively.

[0068] Step S7: the fina...

Embodiment 3

[0071] In this embodiment, a high-strength, corrosion-resistant and fatigue-resistant nano / ultra-fine grain 304 stainless steel processing method, the process steps are as follows:

[0072] Step S1: remove scale and other sundries on the surface of common 304 stainless steel.

[0073] Step S2: Homogenization heat treatment of ordinary 304 stainless steel: heat preservation at 1020° C. for 4 hours.

[0074] Step S3: the rolling temperature and deformation rate of the first pass are 950° C. and 25% respectively.

[0075] Step S4: The rolling temperature and deformation rate of the second pass are 850° C. and 15%, respectively.

[0076] Step S5: The rolling temperature and deformation rate of the third pass are 750° C. and 12%, respectively.

[0077] Step S6: The rolling temperature and deformation rate of the fourth pass are 700°C and 12%, respectively, and the rolling temperature and deformation rate of the fifth pass are 650°C and 10%, respectively.

[0078] Step S7: the fi...

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Abstract

The invention relates to the technical field of processing of nano / ultra-fine grain metal materials, in particular to a processing method of high-strength, corrosion-resistant and anti-fatigue nano / ultra-fine grain 304 stainless steel. Common 304 stainless steel is selected as a raw material, and the high-strength, corrosion-resistant and anti-fatigue nano / ultra-fine grain 304 stainless steel is obtained through the deep rolling technology of homogenizing heat treatment, continuous large deformation, rapid hot rolling and warm rolling and room-temperature annealing. According to the method, the nano / ultra-fine grain 304 stainless steel with high strength and plasticity (the yield strength and the tensile strength are 600 MPa or above and 750 MPa or above correspondingly, and the extension is 30% or above), the anti-fatigue (the fatigue life and the fatigue strength) performance is improved, and the corrosion (uniform corrosion, spot corrosion, stress corrosion, high-temperature oxidation, hot corrosion and the like) resistance is improved can be obtained.

Description

technical field [0001] The invention relates to the technical field of processing nano / ultrafine-grained metal materials, in particular to a high-strength, corrosion-resistant and fatigue-resistant nano / ultra-fine-grained 304 stainless steel processing method. Background technique [0002] As a structural material, 304 stainless steel is widely used in the national economy and defense industry. The service environment of 304 stainless steel is complex, and it will suffer from various damages during the service process. Corrosion (uniform corrosion, pitting corrosion, hot corrosion and high temperature oxidation, etc.), tensile and fatigue (low cycle and high cycle fatigue) damage are the most common. As the international community is increasingly strict and standardized on carbon emission restrictions and the protection of the natural environment, long life, lightweight, energy saving and environmental friendliness are the future development trends of structural materials. ...

Claims

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Application Information

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IPC IPC(8): C21D8/00C21D1/00C21D1/26B21B3/02
CPCC21D8/005C21D1/00C21D1/26B21B3/02Y02P10/20
Inventor 王胜刚孙淼
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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