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High-strength anticorrosive stainless steel for metal doors and windows and processing process of high-strength anticorrosive stainless steel

A technology for metal doors, windows and stainless steel, applied in the field of stainless steel and its preparation, can solve the problems of low temperature toughness and fracture of stainless steel

Inactive Publication Date: 2015-05-27
SUZHOU JIN YUAN OIL MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Metal doors and windows are generally made of stainless steel. It is required that stainless steel for metal doors and windows must have strong anti-corrosion performance and unique stainless steel luster. The thermal insulation performance must be better than that of ordinary steel with the same structure. The requirements are also constantly increasing, and it needs to have sufficient transverse yield strength and corrosion resistance; and in some cold regions, the low-temperature toughness of stainless steel is not high, and it often leads to fracture in a short time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This embodiment is a high-strength anti-corrosion stainless steel used for metal doors and windows. The composition and mass percentage of the stainless steel are: C: 0.07%, Mn: 1.17%, Si: 0.14%, P: 0.006%, S: 0.002%, Nb: 0.083%, V: 0.03%, Ti: 1.86%, Al: 2.53%, N: 0.006%, H: 0.00020%, Cu: 0.07%, Cr: 24.7%, Ni: 17.5%, Mo: 0.13%, Lanthanum: 0.11%, cerium: 0.06%, praseodymium: 0.02%, the balance is Fe and unavoidable impurities;

[0035] In this stainless steel, the first phase is austenite, the second phase is martensite, the volume percentage of the second phase from the surface to 1 / 4 thickness is 4.1%, and the volume percentage of the second phase from 1 / 4 thickness to the center is 6.3% , and no band structure; the average grain diameter of austenite from the surface to 1 / 4 thickness of the stainless steel is 4.5 μm, the average grain diameter of martensite is 3.0 μm, and the average grain diameter of austenite from 1 / 4 thickness to the center is The grain diameter i...

Embodiment 2

[0048] This embodiment is a high-strength anti-corrosion stainless steel used for metal doors and windows. The composition and mass percentage of the stainless steel are: C: 0.08%, Mn: 1.18%, Si: 0.15%, P: 0.007%, S: 0.003%, Nb: 0.084%, V: 0.04%, Ti: 1.87%, Al: 2.54%, N: 0.001%, H: 0.0001%, Cu: 0.08%, Cr: 24.8%, Ni: 17.6%, Mo: 0.14%, Lanthanum: 0.12%, cerium: 0.07%, praseodymium: 0.03%, the balance is Fe and unavoidable impurities;

[0049] In this stainless steel, the first phase is austenite, the second phase is martensite, the volume percentage of the second phase from the surface to 1 / 4 thickness is 4.2%, and the volume percentage of the second phase from 1 / 4 thickness to the center is 6.4% , and no band structure; the average grain diameter of austenite from the surface to 1 / 4 thickness of the stainless steel is 4.6 μm, the average grain diameter of martensite is 3.1 μm, and the average grain diameter of austenite from 1 / 4 thickness to the center is The grain diameter is 7...

Embodiment 3

[0062] This embodiment is a high-strength anti-corrosion stainless steel used for metal doors and windows. The composition and mass percentage of the stainless steel are: C: 0.09%, Mn: 1.19%, Si: 0.16%, P: 0.008%, S: 0.004%, Nb: 0.085%, V: 0.05%, Ti: 1.89%, Al: 2.57%, N: 0.002%, H: 0.0001%, Cu: 0.09%, Cr: 24.9%, Ni: 17.7%, Mo: 0.15%, Lanthanum: 0.13%, cerium: 0.08%, praseodymium: 0.04%, the balance is Fe and unavoidable impurities;

[0063] The first phase in the stainless steel is austenite, the second phase is martensite, the volume percentage of the second phase from the surface to 1 / 4 thickness is 4.3%, and the volume percentage of the second phase from 1 / 4 thickness to the center is 6.5% , and no band structure; the average grain diameter of austenite from the surface to 1 / 4 thickness of the stainless steel is 4.7 μm, the average grain diameter of martensite is 3.2 μm, and the average grain diameter of austenite from 1 / 4 thickness to the center is The grain diameter is 7...

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Abstract

The invention discloses a high-strength anticorrosive stainless steel for metal doors and windows and a processing process of the high-strength anticorrosive stainless steel. The high-strength anticorrosive stainless steel is prepared from the following components in percentage by weight: 0.07-0.09 percent of C, 1.17-1.19 percent of Mn, 0.14-0.16 percent of Si, 0.006-0.008 percent of P, 0.002-0.004 percent of S, 0.083-0.085 percent of Nb, 0.03-0.05 percent of V, 1.86-1.89 percent of Ti, 2.53-2.57 percent of Al, smaller than or equal to 0.006 percent of N, smaller than or equal to 0.00020 percent of H, 0.07-0.09 percent of Cu, 24.7-24.9 percent of Cr, 17.5-17.7 percent of Ni, 0.13-0.15 percent of Mo, 0.11-0.13 percent of lanthanum, 0.06-0.08 percent of cerium, 0.02-0.04 percent of praseodymium and the balance of Fe and inevitable impurities. The high-strength anticorrosive stainless steel is strong in corrosion resistance, high in transverse yield strength and excellent in low temperature toughness.

Description

technical field [0001] The invention relates to a stainless steel and a preparation method thereof, in particular to a high-strength anti-corrosion stainless steel for metal doors and windows and a processing technology thereof. Background technique [0002] Metal doors and windows are generally made of stainless steel. It is required that stainless steel for metal doors and windows must have strong anti-corrosion performance and unique stainless steel luster. The thermal insulation performance must be better than that of ordinary steel with the same structure. The requirements are also constantly increasing, and it needs to have sufficient transverse yield strength and corrosion resistance; and in some cold regions, the low-temperature toughness of stainless steel is not high, and it often leads to fracture in a short time. Therefore, how to effectively improve the transverse yield strength, corrosion resistance and low-temperature toughness of stainless steel for metal doo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/50C21D8/10C09D4/02C09D4/06C09D7/12C09D5/10
Inventor 黄龙海黄瑶琼吴磊
Owner SUZHOU JIN YUAN OIL MACHINERY