Preparation method of TMCP double phase stainless steel composite board for ship

A technology of duplex stainless steel and clad plate, used in manufacturing tools, welding equipment, non-electric welding equipment, etc., can solve the problems of cumbersome process, influence of rolling power, etc., and achieve high market benefits, good corrosion resistance, carbon equivalent low effect

Inactive Publication Date: 2018-07-06
NANJING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional billet assembly process is mainly through the method of sealing and welding around, then drilling and then vacuuming. Because this method

Method used

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  • Preparation method of TMCP double phase stainless steel composite board for ship
  • Preparation method of TMCP double phase stainless steel composite board for ship
  • Preparation method of TMCP double phase stainless steel composite board for ship

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In this example, DH36 steel with a base material thickness of 94mm is selected. The chemical composition is shown in Table 1. The composite material blank is S22053 duplex stainless steel with a thickness of 16mm, and the rolled finished product is S22053+DH36 composite plate with a thickness of 4+24mm.

[0028] One of the surfaces of the two DH36 substrate blanks and the two S22053 composite blanks was ground to expose the fresh metal completely. Apply a release agent to the unpolished surface of the composite material, and dry the release agent. Spot-weld and fix the seal on the periphery of one of the base materials that has been polished; put the non-composite surfaces of the two composite materials together and place them in the groove surrounded by the seal strips, and place the composite surface of the other base material downwards, cover On the top of the two composite materials, at the same time ensure that the four sides of the upper and lower base materials a...

Embodiment 2

[0032]In this example, DH36 steel with a base material thickness of 58.5mm is selected. The chemical composition is shown in Table 1. The composite material blank is S22053 duplex stainless steel with a thickness of 16mm, and the rolled finished product is S22053+DH36 composite plate with a thickness of 3.2+12mm.

[0033] One of the surfaces of the two DH36 substrate blanks and the two S22053 composite blanks was ground to expose the fresh metal completely. Apply a release agent to the unpolished surface of the composite material, and dry the release agent. Spot-weld and fix the seal on the periphery of one of the base materials that has been polished; put the non-composite surfaces of the two composite materials together and place them in the groove surrounded by the seal strips, and place the composite surface of the other base material downwards, cover On the top of the two composite materials, at the same time ensure that the four sides of the upper and lower base material...

Embodiment 3

[0036] In this example, DH36 steel with a base material thickness of 118mm is selected. The chemical composition is shown in Table 1. The composite material blank is S22053 duplex stainless steel with a thickness of 20mm, and the rolled finished product is S22053+DH36 composite plate with a thickness of 5.0+30mm.

[0037] One of the surfaces of the two DH36 substrate blanks and the two S22053 composite blanks was ground to expose the fresh metal completely. Apply a release agent to the unpolished surface of the composite material, and dry the release agent. Spot-weld and fix the seal on the periphery of one of the base materials that has been polished; put the non-composite surfaces of the two composite materials together and place them in the groove surrounded by the seal strips, and place the composite surface of the other base material downwards, cover On the top of the two composite materials, at the same time ensure that the four sides of the upper and lower base material...

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Abstract

The invention relates to a preparation method of a TMCP double phase stainless steel composite board for a ship. The double phase stainless steel composite board for the ship good in metallurgical bonding and excellent in corrosion resistance and structural strength is prepared by the following steps: blank selection, surface treatment, separant brushing, assembling, electron beam sealing, heating, rolling, online quenching, straightening, cutting and board dividing and the like. By adopting electronic beams to seal directly in a vacuum environment, the conventional drilling, vacuumizing stepsand the like are canceled, so that the vacuum degree is further guaranteed. Through a TMCP process, a good mechanical property of a substrate ship board is guaranteed, the substrate ship board whichis rolled is quickly quenched and cooled on line, and a disadvantageous precipitated phase of a composite material is controlled to be separated out, and meanwhile, the composite material is good corrosion resistance as the method is replaced by an online process; the substrate is a low-carbon designed blank, and the prepared composite board is low in carbon equivalent of the substrate, good in welding property and convenient for field construction. In addition, the composite board needs not to be thermally treated, so that a good comprehensive performance can be obtained.

Description

technical field [0001] The invention belongs to the technical field of bimetal composite manufacturing, and in particular relates to a preparation method of a TMCP type marine duplex stainless steel composite plate. Background technique [0002] In recent years, the number of chemical tankers built in China has gradually increased. One of the key technologies in the construction of chemical tanker tanks is the selection of tank lining materials. Good chemical corrosion resistance is an important condition for material selection. Therefore, most of its liquid cargo tanks and liquid cargo pipes are made of stainless steel. In order to ensure corrosion resistance, weldability and economy, the stainless steels commonly used are 316L (00Cr17Ni14Mo2), 304L (0Cr18Ni9) and 2205 duplex stainless steel (22Cr23Ni5Mo3N). Among them, the application of duplex stainless steel has been paid more attention, because duplex stainless steel has structural strength and better corrosion resistan...

Claims

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Application Information

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IPC IPC(8): B21C37/02C22C38/02C22C38/04C22C38/12C22C38/14C22C38/06C22C38/08C22C38/16C22C38/20C22C38/26C22C38/24C22C38/28C22C38/38C22C38/42C22C38/46C22C38/48C22C38/50C22C38/58C22C38/44
CPCB21C37/02C22C38/001C22C38/02C22C38/04C22C38/06C22C38/08C22C38/12C22C38/14C22C38/16C22C38/20C22C38/24C22C38/26C22C38/28C22C38/38C22C38/42C22C38/44C22C38/46C22C38/48C22C38/50C22C38/58B23K20/16B23P15/00
Inventor 王从道党军曾周燏李东晖
Owner NANJING IRON & STEEL CO LTD
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