Manufacturing method for warm rolling of stainless steel/carbon steel composite board

A technology of stainless steel and clad plate, applied in the field of clad plate production, can solve the problems of low surface strength of hot-rolled clad plate, deterioration of stamping performance, decrease of toughness and plastic index, etc., to achieve high production efficiency, prevention of element diffusion, and low production cost Effect

Active Publication Date: 2020-11-17
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The rolling force of the rolling mill required for the clad plate produced by cold rolling is particularly large, and the cold hardening caused by the continuous cold deformation of the rolled clad plate will increase the strength and hardness of the plate, and the ductility and plastic index will decrease, so the stamping performance will deteriorate. Parts for simple deformations
The hot-rolled clad plate has low surface strength and poor quality, but has good plasticity and relatively large thickness

Method used

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  • Manufacturing method for warm rolling of stainless steel/carbon steel composite board

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Manufacture of 304 / Q235 warm-rolled stainless steel-carbon-steel clad plate with anti-seepage layer added

[0031] Such as figure 1 As shown, the surface-treated 304 stainless steel plate blank is coated with an anti-seepage layer. The upper layer is 304 stainless steel plate, and the lower layer is Q235 carbon steel plate, which are symmetrically combined. The anti-seepage layer is in the middle of the interface between stainless steel and carbon steel. The thickness of the stainless steel plate is 3mm, the thickness of the Q235 steel plate is 27mm, the total thickness is 30mm, the length is 50mm, and the width is 25mm. Vacuumize and seal the combined blanks, place them in a heating furnace and heat them to 400°C. 30min, reheat to 550°C, keep warm for 40min, take the billet out of the heating furnace and roll, the reduction of the first pass is 30%, the reduction of the last pass is 2%, and the reductions are 10mm, 4mm, respectively. 3mm, 1mm, the total reduction is 6...

Embodiment 2

[0035] The surface-treated 304 stainless steel sheet blank is coated with an anti-seepage layer. The upper layer is 304 stainless steel sheet, and the lower layer is Q235 carbon steel sheet. They are symmetrically combined. The anti-seepage layer is in the middle of the interface between stainless steel and carbon steel. The thickness of the 304 stainless steel sheet is The thickness of the Q235 steel plate is 27mm, the total thickness is 30mm, the length is 50mm, and the width is 25mm. Vacuumize and seal the combined billets, place them in a heating furnace and heat them to 450°C, keep them warm for 30min, and then Heat to 550°C, hold for 40 minutes, take the billet out of the heating furnace and roll, the first pass reduction is 30%, the last pass reduction is 2%, the reductions are 10mm, 4mm, 3mm, 1mm respectively , the total reduction is 60%.

[0036] The test performance of the stainless steel carbon steel clad plate prepared by warm rolling in this example is as follows:...

Embodiment 3

[0038] The surface-treated 304 stainless steel sheet blank is coated with an anti-seepage layer. The upper layer is 304 stainless steel sheet, and the lower layer is Q235 carbon steel sheet. They are symmetrically combined. The anti-seepage layer is in the middle of the interface between stainless steel and carbon steel. The thickness of the 304 stainless steel sheet is The thickness of the Q235 steel plate is 27mm, the total thickness is 30mm, the length is 50mm, and the width is 25mm. Vacuumize and seal the combined billets, place them in a heating furnace and heat them to 500°C, keep them warm for 30min, and then Heat to 550°C, hold for 40 minutes, take the billet out of the heating furnace and roll, the first pass reduction is 30%, the last pass reduction is 2%, the reductions are 10mm, 4mm, 3mm, 1mm respectively , the total reduction is 60%.

[0039] The test performance of the stainless steel carbon steel clad plate prepared by warm rolling in this example is as follows:...

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Abstract

The invention relates to the technical field of composite board production, in particular to a manufacturing method for warming rolling of a stainless steel / carbon steel composite board. According tothe method, a selected stainless steel board blank and a carbon steel board blank are subjected to surface treatment, then the composite contact side of stainless steel and carbon steel is coated withan impervious layer, drying is carried out at room temperature, then the two blanks are arranged in an aligning manner and symmetrically combined into a blank, the periphery of the composite blank obtained after combination is welded and sealed and subjected to vacuumizing treatment, then the composite blank is placed into a heating furnace to be subjected to multi-pass rolling, the composite blank is cooled in air after being rolled, and cut face smoothness treatment is carried out. According to the method, the stainless steel board blank is coated with the impervious layer, at a specific heating temperature section and heat preservation time, the stainless steel is protected, and the situation that in the rolling process, due to element dispersing, performance of the composite board isreduced can be avoided. By means of the impervious layer, mutual dispersion between Cr and C elements in the rolling process at a high temperature can be effectively avoided.

Description

technical field [0001] The invention relates to the technical field of composite plate production, in particular to a method for preparing a warm-rolled stainless steel / carbon steel composite plate. Background technique [0002] The current stainless steel carbon steel clad plate can not only show the stainless steel properties such as corrosion resistance, wear resistance and heat resistance of stainless steel, but also have the higher formability, ductility and thermal conductivity of carbon steel. The stainless steel carbon steel clad plate can save a lot of precious metal elements (Cr, Ni) in stainless steel, and can reduce production costs and improve performance. Nowadays, stainless steel and carbon steel clad plates are widely used in key fields such as pressure vessels, oil pipelines, seawater desalination equipment and automobile manufacturing. [0003] However, there are cold rolling and hot rolling for the rolling process of stainless steel carbon steel clad plat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 姜庆伟余豪李小红赵忠超
Owner KUNMING UNIV OF SCI & TECH
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