Chromium-saved duplex stainless steel with phase-change plasticization effect and preparation method of chromium-saved duplex stainless steel with phase-change plasticization effect

A duplex stainless steel and phase transformation technology, applied in the field of iron and steel alloy materials, can solve the problems of reducing dependence on precious alloy resources, low elongation of thin plates, and difficult thermal processing.

Inactive Publication Date: 2013-04-24
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the further continuous growth of domestic stainless steel production capacity and apparent consumption demand, the problems of chromium and molybdenum resources have surfaced and become increasingly prominent. At the same time, there are still contradictions between high strength and poor plasticity in the wide application of economical duplex stainless steel. Its difficulty in hot processing and low elongation of the thin plate, in this context, in view of the shortcomings of the existing duplex stainless steel, it is very necessary to develop a new generation of chromium resources and molybdenum resource-savin...

Method used

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  • Chromium-saved duplex stainless steel with phase-change plasticization effect and preparation method of chromium-saved duplex stainless steel with phase-change plasticization effect

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] In this embodiment, the composition and mass percentage of duplex stainless steel are as follows:

[0012] Cr 14.9%

[0013] Ni 1.9%

[0014] Mn 8.1%

[0015] C 0.026%

[0016] Rare earth Ce 0.10%

[0017] Al 1.2%

[0018] S 0.004%

[0019] P 0.008%

[0020] B 0.001%

[0021] Fe balance

[0022] The traditional conventional smelting process method is adopted, and the rare earth master alloy is put in before casting. After comprehensive measurement calculation and batching melting, pouring molding, hot forging and cold rolling, and a certain solution treatment, the duplex stainless steel alloy material with TRIP effect is finally obtained. The ferrite content varies with the solution temperature. Variation curve such as figure 1 , the room temperature tensile breaking strength of the material is greater than 900MPa, the yield strength is greater than 450MPa, and the elongation at break is greater than 30%.

Embodiment 2

[0024] In this embodiment, the composition and mass percentage of duplex stainless steel are as follows:

[0025] Cr 15.3%

[0026] Ni 2.1%

[0027] Mn 15.0%

[0028] C 0.028%

[0029] Rare earth Ce 0.10%

[0030] Al 2.10%

[0031] Si 1.2%

[0032] S 0.002%

[0033] P 0.009%

[0034] B 0.002%

[0035] Fe balance

[0036] The traditional conventional smelting process method is adopted, and the rare earth master alloy is put in before casting. After comprehensive measurement calculation and batch melting, casting, hot forging, cold rolling, and appropriate solution treatment, a duplex stainless steel with TRIP effect is finally produced. Its room temperature tensile breaking strength is greater than 850MPa, and its yield strength is Greater than 450MPa, elongation at break greater than 30%.

Embodiment 3

[0038] In this embodiment, the composition and mass percentage of duplex stainless steel are as follows:

[0039] Cr 14.8%

[0040] Ni 2.0%

[0041] Mn 12.2%

[0042] C 0.021%

[0043] Rare earth Ce 0.10%

[0044] Al 0.75%

[0045] Si 2.0%

[0046] S 0.003%

[0047] P 0.007%

[0048] B 0.0015%

[0049] Fe balance

[0050] The traditional conventional smelting process method is adopted, and the rare earth master alloy is put in before casting. After comprehensive measurement calculation and batching melting, pouring molding, hot forging and cold rolling, and then a certain solution treatment, the duplex stainless steel alloy material with TRIP effect is finally obtained, and its room temperature tensile breaking strength is greater than 850MPa, yielding The strength is greater than 500MPa, and the elongation at break is greater than 50%.

[0051] This type of duplex stainless steel material has excellent plasticity and excellent corrosion resistance. It can be us...

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Abstract

The invention relates to a chromium-saved duplex stainless steel with a phase-change plasticization effect and a preparation method of the chromium-saved duplex stainless steel with the phase-change plasticization effect, and belongs to the technical field of steel alloy materials. The duplex stainless steel comprises components in percentage by mass as follows: more than 0 and less than or equal to 0.06% of C, less than or equal to 0.008% of S, less than or equal to 0.01% of P, 13.0-17.5% of Cr, 5-17% of Mn, 0.1-3.0% of Ni, 0.5-2.5% of Al or Si, 0.001-0.01% of B, 0.005-0.20% of rare earth Ce or Y, and the balance of Fe. A conventional melting process is adopted, rare-earth intermediate alloy is added before casting, which means that Fe-Ce intermediate alloy or Fe-Y intermediate alloy is prepared in advance and then cast and molded after comprehensive material blending and melting, and the duplex stainless steel with the phase-change plasticization effect is finally obtained after hot forging, cold rolling and appropriate solution treatment.

Description

technical field [0001] The invention relates to a duplex stainless steel with phase change plasticizing effect and a preparation method thereof, belonging to the technical field of iron and steel alloy materials. Background technique [0002] Duplex stainless steels consist of austenite and ferrite. The main components of duplex stainless steel are chromium, nickel, and molybdenum. In order to reduce the cost and reduce the content of nickel in the steel, alloying elements such as nitrogen and manganese can be added; and in order to reduce the chromium content in the steel, alloys such as aluminum and silicon can be added. element. With the further continuous growth of domestic stainless steel production capacity and apparent consumption demand, the problems of chromium and molybdenum resources have surfaced and become increasingly prominent. At the same time, there are still contradictions between high strength and poor plasticity in the wide application of economical dup...

Claims

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Application Information

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IPC IPC(8): C22C38/58
Inventor 肖学山李钧万建全刘乐柳刚冉庆选余晓江林根文余海峰江来珠
Owner SHANGHAI UNIV
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