High-carbon high-chromium duplex stainless steel

A duplex stainless steel, high-carbon and high-chromium technology, applied in the field of duplex stainless steel, can solve the problems of less high-carbon duplex stainless steel, increased production difficulty and cost, and does not involve material structure and performance, so as to improve the strength and hardness of the alloy , Reduce production cost and difficulty, the effect of convenient materials

Inactive Publication Date: 2014-02-26
SHANDONG JIANZHU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual production of low-carbon duplex stainless steel, decarburization treatment is required, which increases the difficulty and cost of production
As we all know, carbon is one of the most effective and economical elements to improve the strength of alloys, but so far, there are relatively few reports on high-carbon duplex stainless steel
ChristofMessne et al. used duplex stainless steel containing 0.2% carbon when studying the effect of rolling parameters on the surface roughness of the alloy, but did not involve the structure and properties of the material itself

Method used

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  • High-carbon high-chromium duplex stainless steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A high-carbon and high-chromium duplex stainless steel. The chemical composition of the stainless steel is as follows: 0.35%C, 23%Cr, 12%Ni, 3.5%Mo, 4%Cu, 0.5%V, 2.7%W, 0.015%S, 0.010%P, 1% other impurity elements, and the balance is Fe.

[0026] The specific steps of its preparation process are as follows:

[0027] (1) Melting and casting The raw materials are mixed and melted according to the above ratio and then cast into ingots at 1550°C;

[0028] (2) Forging Forge the above ingot at 1200°C into a steel plate;

[0029] (3) Rolling The forged steel plate is rolled into steel plate at 1100°C;

[0030] (4) Solution treatment: Heat the rolled steel plate to 1150°C, keep it warm for 60 minutes, and then quench it to obtain the product. Example 2

Embodiment 2

[0031] A high-carbon and high-chromium duplex stainless steel. The chemical composition of the stainless steel is as follows: 0.20%C, 25%Cr, 10%Ni, 2%Mo, 2%Cu, 3.1%V, 0.5%W, 0.015%S, 0.010%P, 1% other impurity elements, and the balance is Fe.

[0032] The specific steps of its preparation process are as follows:

[0033] (1) Melting and casting The raw materials are mixed and melted according to the above ratio and then cast into ingots at 1570°C;

[0034] (2) Forging Forge the above ingot at 1150°C into a steel plate;

[0035] (3) Rolling The forged steel plate is rolled into steel plate at 1150°C;

[0036] (4) Solution treatment: Heat the rolled steel plate to 1300°C, keep it warm for 20 minutes, and then quench it to obtain the product. Example 3

Embodiment 3

[0037] A high carbon and high chromium duplex stainless steel, the chemical composition of the stainless steel is as follows: 0.25%C, 24%Cr, 14%Ni, 3%Mo, 5%Cu, 2.2%V, 5%W, 0.005% S, 0.015% P, 0.5% other impurity elements, and the balance is Fe.

[0038] The specific steps of its preparation process are as follows:

[0039] (1) Melting and casting The raw materials are mixed and melted according to the above ratio and then cast into ingots at 1600°C;

[0040] (2) Forging Forge the above ingot at 1170°C into a steel plate;

[0041] (3) Rolling The forged steel plate is rolled into steel plate at 1050°C;

[0042] (4) Solution treatment Heat the rolled steel plate to 1200°C, keep it warm for 40 minutes and then quench it to obtain the product. Example 4

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Abstract

The invention relates to duplex stainless steel, and particularly relates to duplex stainless steel containing high-carbon and high-chromium elements and a production process thereof. The stainless steel provided by the invention comprises the following chemical components in percentage by weight: 0.20-0.35% of C, 22-26% of Cr, 10-14% of Ni, 2-5% of Mo, 1-5% of Cu, 0.5-4% of V, 0.5-5% of W, less than or equal to 0.015% of S, less than or equal to 0.015% of P, less than or equal to 1% of other impurity elements and the balance of Fe. In the duplex stainless steel provided by the invention, the carbon content of the stainless steel is increased, the alloy strength and hardness are improved, and the wear resistance is enhanced; apart from the commonly used elements Cr, Ni and Mo, the alloy is also added with the elements Cu, W and V, thus the tensile strength and hardness of the alloy are greatly improved under the condition of guaranteeing enough corrosion resistance of the duplex stainless steel.

Description

technical field [0001] The invention relates to a duplex stainless steel, in particular to a duplex stainless steel containing high carbon and high chromium elements and a production process thereof. Background technique [0002] With the development of modern industrial technology, the requirements for the comprehensive performance of materials are getting higher and higher, especially in industries with strong corrosiveness such as petroleum, chemical industry, and shipbuilding. In the early days, nickel-rich austenitic stainless steel was used as the material for working in corrosive environments. Practice has shown that duplex stainless steel is more corrosion-resistant than austenitic steel, and has good comprehensive mechanical properties and welding properties. In recent years, the research on duplex stainless steel is mainly based on low carbon (generally 0.01%~0.08%C). However, in the actual production of low-carbon duplex stainless steel, decarburization treatmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/46C21D8/02
Inventor 赵忠魁
Owner SHANDONG JIANZHU UNIV
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