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A kind of plasticized reinforced economical duplex stainless steel and its preparation method

A duplex stainless steel, economical technology, applied in the field of steel material manufacturing, can solve problems such as weakening of plasticizing effect

Active Publication Date: 2022-03-22
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Grain refinement is the most direct and effective means to improve the strength of materials. While the grain refinement of economical duplex stainless steel is carried out, the stability of its metastable austenite has been improved to a certain extent, and the increase caused by the Trip effect The plasticizing effect is suppressed, so that although its strength has been improved, but at the same time its plasticity is suppressed due to the Trip effect, resulting in a weakened plasticizing effect to a certain extent

Method used

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  • A kind of plasticized reinforced economical duplex stainless steel and its preparation method
  • A kind of plasticized reinforced economical duplex stainless steel and its preparation method
  • A kind of plasticized reinforced economical duplex stainless steel and its preparation method

Examples

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Embodiment 1

[0040] This embodiment provides a kind of economical duplex stainless steel strengthened by plasticization, and its preparation method includes the following steps, and the technological process is as follows: figure 1 Shown:

[0041] Step 1: Select the hot forged economical duplex stainless steel plate, the content (wt.%) of the main alloy elements Cr, Ni, Mn, N, C, Si is 19.00, 0.20, 3.91, 0.31, 0.03, 0.21. Put the hot-forged economical duplex stainless steel plate on the gleeble, heat it up to 1300°C at a heating rate of 20°C / s under vacuum conditions, keep it for 15 minutes, and then slowly cool it at a rate of 10°C / s under air conditions Cool to room temperature. The process is a first-level solid solution treatment; the gleeble3800 thermophysical simulation testing machine is used.

[0042] Step 2: At room temperature, the asynchronous rolling treatment with a deformation of 80% is carried out on the economical duplex stainless steel plate after the primary solution tr...

Embodiment 2

[0047] This embodiment provides a plasticized and reinforced economical duplex stainless steel, the preparation method of which includes the following steps:

[0048] Step 1: Select the hot forged economical duplex stainless steel plate, the content (wt.%) of the main alloying elements Cr, Ni, Mn, N, C, Si is 19.23, 1.05, 2.94, 0.21, 0.0578, 0.781. Put the hot-forged economical duplex stainless steel plate on the gleeble, heat it up to 1300°C under vacuum conditions, keep it for 15 minutes, and then cool it to room temperature at a cooling rate of 10°C / s under air conditions. This process is a first-level process. Solution treatment; Gleeble3800 thermophysical simulation testing machine is used.

[0049] Step 2: At room temperature, the asynchronous rolling treatment with a deformation of 80% is carried out on the economical duplex stainless steel plate after the primary solution treatment. The roll diameter ratio of the two rolls of the asynchronous rolling is 0.75, and the r...

Embodiment 3

[0053] This embodiment provides a plasticized and reinforced economical duplex stainless steel, the preparation method of which includes the following steps:

[0054] Step 1: Select the hot forged economical duplex stainless steel plate, the content (wt.%) of the main alloy elements Cr, Ni, Mn, N, C, Si is 19.00, 0.20, 3.91, 0.31, 0.03, 0.21. Place the hot-forged economical duplex stainless steel plate on the gleeble, heat it up to 1300°C at a heating rate of 20°C / s, keep it for 15 minutes, and then cool it to room temperature at a cooling rate of 10°C / s under air conditions. The process is first-level solid solution treatment; the gleeble3800 thermophysical simulation testing machine is used.

[0055] Step 2: At room temperature, the economical duplex stainless steel plate after primary solution treatment is subjected to asynchronous rolling treatment with a deformation amount of 80%. The roll diameter ratio of the two rolls of asynchronous rolling is 0.75, and the rolling sp...

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Abstract

The invention provides a plasticized and reinforced economical duplex stainless steel and a preparation method thereof, which belong to the field of iron and steel material manufacturing. The preparation method comprises: rapidly heating the economical duplex stainless steel to 1300-1400°C, keeping it warm, and slowly cooling to room temperature; then performing asynchronous rolling treatment on the economical duplex stainless steel at room temperature; The economical duplex stainless steel is heated to 1050-1150°C under atmospheric conditions, kept warm for 2-5 minutes, and then cooled to room temperature. This method adopts pre-solution heat treatment + asynchronous cold deformation + solution treatment, which improves the banded structure of duplex stainless steel, can increase the tensile strength of economical duplex stainless steel to nearly 1000Mpa, and nearly doubles the elongation. Up to 60%, the strong plastic product has more than doubled, up to 60Gpa%.

Description

technical field [0001] The invention relates to the field of iron and steel material manufacturing, in particular to a plasticized and reinforced economical duplex stainless steel and a preparation method thereof. Background technique [0002] Duplex stainless steel is defined as stainless steel with a two-phase structure of ferrite and austenite, and economical duplex stainless steel enables duplex stainless steel to reduce the content of rare and expensive metal Ni while making the austenite component phase appear Metastable. The metastable austenite can realize the TRIP effect through the martensitic phase transformation during the deformation process, improve the plastic deformation ability of the material, and obtain a combination of high plasticity and high strength. It is used in marine vehicles, heat exchangers, chemical storage tanks, etc. has a wide range of applications. [0003] With the demand for lightweight steel in many modern applications, including the au...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/58C22C38/02C21D8/00
CPCC22C38/58C22C38/02C22C38/001C21D8/005C21D2211/005C21D2211/001
Inventor 陈雷彭程郝硕王永鑫张鑫
Owner YANSHAN UNIV
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