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A kind of preparation method of stainless steel composite plate for TMCP type bridge

A composite plate and stainless steel technology, which is applied in the field of preparation of stainless steel composite plates for TMCP bridges, can solve the problems of high rolling production efficiency, high carbon equivalent of composite plate base material and difficult welding, etc., and achieve good comprehensive performance and low carbon equivalent , good corrosion resistance effect

Active Publication Date: 2018-06-19
NANJING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a method for preparing stainless steel composite panels for TMCP bridges. The base material used is bridge steel with low carbon design. The billets are formed by welding the seal and the base material with electron beams, and then rolled by the TMCP process to prepare a stainless steel clad plate for bridges with good metallurgical bonding, which effectively solves the problem that the base material of the clad plate has a high carbon equivalent and is difficult to weld. The billet process reduces the drilling and vacuuming process, the process is simple, and the rolling efficiency is high

Method used

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  • A kind of preparation method of stainless steel composite plate for TMCP type bridge

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Effect test

Embodiment 1

[0030] In this embodiment, the Q345qD steel type with a base material thickness of 96mm is selected. The chemical composition is shown in Table 1. The cladding material thickness is 18mm for 321 stainless steel, and the rolled finished product is 321+Q345qD composite plate with a thickness of 3+16mm.

[0031] Grind one of the surfaces of two Q345qD base material blanks and two 321 cladding material blanks to remove the rust layer and oxide layer on the surface of the blanks, so that fresh metal is completely exposed on the surface. Apply a release agent to the unsanded surface of the cladding, and then dry the release agent. Spot-weld and fix the seals around the polished surface of one of the substrates. The height of the seal is 36mm and the width is 45mm; the non-composite surfaces of the two cladding materials are superimposed and placed in the groove surrounded by the seals, and then the other One piece of base material composite face down, cover on the top of two claddin...

Embodiment 2

[0034] In this embodiment, the Q370qD steel type with a base material thickness of 192 mm is selected. The chemical composition is shown in Table 1. The cladding material thickness is 16 mm.

[0035]Grind one surface of two Q370qD base material blanks and two S31603 cladding material blanks to remove the rust layer and oxide layer on the surface of the blanks, so that fresh metal is completely exposed on the surface. Apply a release agent to the unsanded surface of the cladding, and then dry the release agent. Spot-weld the sealing strips on the periphery of one of the substrates that have been polished. The height of the sealing strip is 32mm and the width is 50mm; The composite surface of the base material is facing down, covering the top of the two cladding materials and the groove, ensuring that the four sides of the upper and lower base materials are flush with the outer edge of the seal, thus forming a composite billet to be sealed and welded. Send the assembled composi...

Embodiment 3

[0039] In this embodiment, the Q370qE steel type with a base material thickness of 107 mm is selected. The chemical composition is shown in Table 1. The cladding material thickness is 16 mm.

[0040] Grind one of the surfaces of two Q370qE base material blanks and two S31603 cladding material blanks to remove the rust layer and oxide layer on the surface of the blanks, so that fresh metal is completely exposed on the surface. Apply a release agent to the unsanded surface of the cladding, and then dry the release agent. Spot-weld the sealing strip around the polished surface of one of the base materials. The height of the sealing strip is 32mm and the width is 40mm; The composite surface of the base material is facing down, covering the top of the two cladding materials and the groove, ensuring that the four sides of the upper and lower base materials are flush with the outer edge of the seal, thus forming a composite billet to be sealed and welded. Send the assembled composit...

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Abstract

Provided is a method for preparing a stainless steel composite plate for a TMCP bridge. The stainless steel composite plate for the bridge, having excellent metallurgic bonding, is prepared by means of the steps such as blank selection, surface treatment, isolating agent brushing, blank assembly, electronic beam sealing and welding, heating, rolling, straightening, cutting and plate separation. In the method, sealing and welding are directly carried out in a vacuum chamber environment by using electronic beams, drilling, vacuumizing and other procedures in the traditional technology are omitted, and accordingly the vacuum degree is better ensured. By means of the TMCP process, excellent mechanical performance of substrate bridge steel and quick cooling after rolling are ensured, intercrystalline precipitation of a coating material is controlled, and excellent corrosion resistance of the coating material is ensured. A designed low-carbon blank is used on the substrate. The prepared composite plate has a low carbon equivalent in the substrate, has excellent welding performance and is convenient for onsite construction; and in addition, the composite plate can obtain excellent comprehensive performance without heat treatment.

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 stainless steel composite plate for a TMCP bridge. Background technique [0002] At present, the bridge decks of my country's high-speed railways and passenger-dedicated railway steel bridges are all designed with orthotropic plate structure steel decks. Water accumulation is easy to occur at the connection between the ballast tank and the bridge deck, which will cause corrosion of the bridge deck. Ultimately affect the service life of the railway steel bridge. Stainless steel composite panels for bridges have both the corrosion resistance of cladding stainless steel and the strength and toughness of base bridge steel. The use of stainless steel composite panels on railway bridge decks can just solve the corrosion problem of bridge decks. Therefore, stainless steel composite panels for bridges will gradually be applied...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 曾周燏党军江姗李东晖
Owner NANJING IRON & STEEL CO LTD