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Cold rolling method for improving comprehensive performance of BCC structure corrosion-resistant alloy sheet

A corrosion-resistant alloy with comprehensive performance technology, applied in the field of iron and steel alloy materials, can solve the problems that the process method is difficult to achieve large-scale industrial application, it is difficult to apply non-phase transformation type BCC structure corrosion-resistant alloy, and the degree of performance improvement is low, reaching The average wrinkle height is reduced, the requirements for production equipment are not high, and the plastic strain ratio is improved.

Pending Publication Date: 2022-07-05
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned technological methods either fail to take into account the simultaneous improvement of the above three performance indicators when improving the performance of BCC structure corrosion-resistant alloys, or the degree of performance improvement is low, or the corresponding technological methods are difficult to achieve large-scale industrialization application, or the corresponding process method is only suitable for phase-change BCC structure corrosion-resistant alloys, it is difficult to apply to non-phase-transformation BCC structure corrosion-resistant alloys

Method used

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  • Cold rolling method for improving comprehensive performance of BCC structure corrosion-resistant alloy sheet
  • Cold rolling method for improving comprehensive performance of BCC structure corrosion-resistant alloy sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Smelting and casting according to the set composition to make an ingot, the composition of the ingot contains C 0.0099%, N 0.0094%, Cr 25.2%, Zr 0.28%, V 0.07%, Si 0.14%, Mn 0.07% according to the mass percentage , the balance is Fe and inevitable impurities; the ingot contains P 0.02%, S 0.001%, O 0.003% by mass percentage;

[0041] (2) The hot-rolled ingot is cooled to room temperature to make a hot-rolled sheet; the hot-rolled sheet is annealed to make a hot-rolled annealed sheet; hot rolling is to heat the ingot to 1200±30°C for 150 minutes, and then The rolling was started at 1100°C, and the final rolling temperature was 850°C; the reduction ratio of hot rolling was 97%; 0 =6mm;

[0042] (3) carrying out the first stage cold rolling of the hot-rolled and annealed sheet to make the first cold-rolled sheet;

[0043] (4) The first cold-rolled sheet is subjected to intermediate annealing, and then the second-stage cold-rolling is performed to make the second cold...

Embodiment 2

[0052] The method is the same as in Example 1, except that:

[0053] In the two-stage cold rolling process, the distribution coefficient of cold rolling reduction in different stages is n=0.3, where n=(2.43–0.9) / (6–0.9);

[0054] After testing, the average r value of the finished board is 2.26, the anisotropy parameter Δr is 0.21, and the average wrinkle height is 11.05 μm; the surface morphology photo of the finished board after 15% tensile deformation is as follows figure 1 As shown in the middle picture; the roughness curve of the finished plate after 15% tensile deformation is as follows figure 2 shown in the middle picture.

Embodiment 3

[0056] The method is the same as in Example 1, except that:

[0057] The total reduction ratio of the first-stage cold rolling and the second-stage cold rolling is 90%; in the two-stage cold rolling process, the distribution coefficient of cold rolling reduction in different stages is n=0.45, where n=(3.03–0.6 ) / (6–0.6);

[0058] After testing, the average r value of the finished board is 2.35, the anisotropy parameter Δr is 0.3, and the average wrinkle height is 11.34 μm; the surface morphology photo of the finished board after 15% tensile deformation is as follows figure 1 As shown in the figure below; the roughness curve of the finished plate after 15% tensile deformation is as follows figure 2 as shown below.

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Abstract

A cold rolling method for improving the comprehensive performance of a BCC structure corrosion-resistant alloy sheet comprises the following steps that (1) set components are smelted and cast into a cast ingot, and the cast ingot comprises, by mass, less than or equal to 0.012% of C, less than or equal to 0.012% of N, 23-26% of Cr, 0.05-0.35% of Zr, 0.05-0.35% of V, less than or equal to 0.4% of Si, less than or equal to 0.25% of Mn and the balance Fe and inevitable impurities; (2) the cast ingot is hot-rolled and then cooled to the normal temperature, and annealing treatment is conducted; (3) carrying out first-stage cold rolling to prepare a first cold-rolled sheet; (4) intermediate annealing is carried out, and then second-stage cold rolling is carried out; and (5) performing final annealing. The process method is simple and easy to implement, the requirement for production equipment is not high, and the BCC structure corrosion-resistant alloy sheet with excellent comprehensive performance can be produced under the condition that an actual production line is not upgraded.

Description

technical field [0001] The invention belongs to the technical field of steel alloy materials, in particular to a cold rolling method for improving the comprehensive performance of a BCC structure corrosion-resistant alloy sheet. Background technique [0002] The production of FCC structural corrosion-resistant alloys (such as 304, 316 austenitic stainless steel) requires a large amount of mineral resources, especially nickel resources. BCC structure corrosion-resistant alloys (such as 443, 445 ferritic stainless steel) are nickel-free or nickel-saving stainless steels. If high-performance BCC structure corrosion-resistant alloys can be developed to replace FCC structure corrosion-resistant alloys, production costs will be greatly reduced. Compared with FCC structure corrosion-resistant alloy, BCC structure corrosion-resistant alloy has excellent resistance to chloride stress corrosion, pitting corrosion, crevice corrosion and other properties, and has higher strength, low co...

Claims

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Application Information

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IPC IPC(8): C21D8/02C21D1/26C22C38/02C22C38/04C22C38/24C22C38/28B21B37/58
CPCC21D8/0205C21D8/0226C21D8/0236C21D8/0247C21D8/0268C21D1/26C22C38/02C22C38/04C22C38/24C22C38/28B21B37/58
Inventor 高飞朱启勇高子龙南宇旗张峰源李成刚
Owner NORTHEASTERN UNIV
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