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Clad steel plate for nuclear power engineering and manufacturing method of clad steel plate

A technology for clad steel plates and nuclear power engineering, applied in non-electric welding equipment, metal processing equipment, chemical instruments and methods, etc. It can solve the problems of high requirements on stainless steel mechanical performance parameters, inability to meet the needs of stainless steel plates, and few stainless steel manufacturers. The effect of saving precious metal usage, reducing imports, and uniform surface corrosion resistance

Active Publication Date: 2015-06-24
太原钢铁(集团)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In recent years, the stainless steel industry has developed rapidly, especially steel plates with better mechanical properties. With the development of the nuclear power industry, the requirements for stainless steel plates have gradually increased. The existing stainless steel plates on the market can no longer meet the requirements of nuclear power projects for stainless steel plates. need
At present, stainless steel plates are used in nuclear power projects, which have high requirements on the mechanical performance parameters of stainless steel. There are few manufacturers who can produce stainless steel for nuclear power projects, and the output is low, which cannot meet the needs of domestic nuclear power projects. Therefore, more than 90% of nuclear power stainless steel depends on imports.

Method used

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  • Clad steel plate for nuclear power engineering and manufacturing method of clad steel plate
  • Clad steel plate for nuclear power engineering and manufacturing method of clad steel plate
  • Clad steel plate for nuclear power engineering and manufacturing method of clad steel plate

Examples

Experimental program
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Effect test

preparation example Construction

[0053] The present invention also provides a method for preparing a composite steel plate, comprising the steps of:

[0054] (1) Surface treatment: the surface of the substrate and the double board is treated; wherein the treatment described in step (1) is grinding, preferably the surface roughness value Ra of the polished substrate and double board is not greater than 7.0 μm, preferably not greater than 6.3 μm.

[0055] (2) Explosive welding: carry out explosive welding to the base plate after step (1) process and double plate; The detonation velocity of the explosive used in described explosive welding is 1800m / s-2000m / s, is preferably 1850-1950m / s, the density of explosive 0.50g / cm 3 -0.60g / cm 3 , the preferred density is 0.55-0.60g / cm 3 .

[0056](3) Heat treatment: keep the clad steel plate after step (2) explosively welded at 920-940°C, and then pass in nitrogen gas when the final temperature is 760°C, cool it out of the furnace, and perform high-temperature temperin...

Embodiment

[0096] The specific composition and content of the various raw materials used in the following examples of the present invention are as follows:

[0097] The surface roughness was measured using a TR210 hand-held roughness meter manufactured by Beijing Shidaizhifeng Technology Co., Ltd.

[0098] The sampling method of parameter determination in the embodiment

[0099] 1. Cutting of sample

[0100] Samples are cut from the bottom corners of both ends of the composite steel plate to be tested (except for bonding strength test sampling), and the two samples are located on both sides of the axis of the steel plate. The bond strength test sample is taken from the middle part of the head of the rolled steel plate. The distance from any heat-treated edge of the clad plate shall not be less than the thickness of the clad plate, and the intercepted test specimens shall be appropriately marked and marked with the direction of final rolling. The samples for each sampling location shal...

Embodiment 1

[0148] 1. Matching and detection

[0149] Compare the length-to-width ratio of the base plate and double plate whose composition is shown in Table 4, and the dimensions of the selected base plate and double plate are as follows:

[0150] Substrate: SA533 B CL.1 steel plate in SA-533 / SA-533M. Length 10050mm; width 1500mm; thickness 20mm;

[0151] Double plate: SA240 304L (Z2CN18-10) stainless steel in ASTM SA240. Length 10150mm; width 1580mm; thickness 3mm.

[0152] Conduct non-destructive testing on the base plate and double plate of the clad steel plate used above, and conduct 100% volume ultrasonic testing on the base plate steel plate of the clad steel plate according to the testing method and acceptance standard of ASME Volume V non-destructive testing, and the test result is no crack, fold , slag inclusion and other rolling defects; X-ray inspection and penetrant inspection are carried out on the cladding plate of the clad steel plate, and the inspection results show t...

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Abstract

The invention relates to a clad steel plate for nuclear power engineering. The clad steel plate comprises a base plate and a cladding plate, wherein the base plate is a killed steel plate, the cladding plate is a nickel-chromium austenitic stainless steel plate, and the base plate and the cladding plate are combined to form the clad steel plate; the base plate comprises the following components: not larger than 0.25% of C, 1.00-1.80% of Mn, not larger than 0.015% of P, not larger than 0.015% of S, 0.10-0.50% of Si, 0.35-0.70% of Mo, 0.30-0.80% of Ni, not larger than 0.125% of Cu, not larger than 0.25% of Cr, not larger than 0.06% of V, not larger than 0.02% of Nb, not larger than 0.03% of Ti, not larger than 0.25% of Co, not less than 0.02% of Al, and the balance of iron and unavoidable impurities; and the cladding plate comprises the following components: not larger than 0.035% of C, not larger than 2.00% of Mn, not larger than 0.015% of P, not larger than 0.015% of S, not larger than 0.80% of Si, 7.00-12.5% of Ni, not larger than 0.12% of Cu, 17.50-20.50% of Cr, not larger than 0.06% of V, not larger than 0.05% of Co, not larger than 0.11% of N and the balance of iron and unavoidable impurities. The invention further discloses a method for manufacturing of the clad steel plate. The method comprises the following step of (1) surface treatment; (2) explosion welding; and (3) thermal treatment: keeping 920-940 DEG C after the clad steel plate is subjected to the explosion welding in the step of (2), ventilating nitrogen after heating the clad steel plate to be 750-770 DEG C, cooling and carrying out high-temperature tempering to obtain the clad steel plate.

Description

technical field [0001] The invention relates to a composite steel plate for nuclear power engineering and a manufacturing method thereof, in particular to a metal composite steel plate with high pitting corrosion resistance and high crevice corrosion resistance for nuclear power engineering and a manufacturing method thereof. Background technique [0002] In recent years, the stainless steel industry has developed rapidly, especially steel plates with better mechanical properties. With the development of the nuclear power industry, the requirements for stainless steel plates have gradually increased. The existing stainless steel plates on the market can no longer meet the requirements of nuclear power projects for stainless steel plates. need. At present, stainless steel plates are used in nuclear power projects, which have high requirements on the mechanical performance parameters of stainless steel. There are few manufacturers capable of producing stainless steel for nucle...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B15/01B23K20/08B23K20/26C22C38/08C22C38/40C22C38/58
Inventor 卫世杰杨成义王虎成郭励武白志伟杨国俊王海峰王强达
Owner 太原钢铁(集团)有限公司
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