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Cold-rolling steel belt for flux-cored wire and manufacture method thereof

A manufacturing method and technology of cold-rolled steel strip, applied in the field of metal materials, can solve the problems of high cost, low elongation, low yield ratio and the like

Inactive Publication Date: 2011-04-20
SHANDONG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of some disadvantages of the existing steel for flux-cored welding wires, such as high cost, high content of impurity elements, low elongation, and easy occurrence of broken bands, etc., the purpose of the present invention is to provide a low yield ratio, high elongation, Production method of steel strip for flux-cored welding wire with simple production process, stable performance and low production cost

Method used

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  • Cold-rolling steel belt for flux-cored wire and manufacture method thereof
  • Cold-rolling steel belt for flux-cored wire and manufacture method thereof
  • Cold-rolling steel belt for flux-cored wire and manufacture method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Smelt molten steel according to the following ingredients (by mass percentage): 0.01% C, 0.02% Si, 0.15% Mn, 0.003% N, 0.008% P, 0.008% S, 0.03% Alt, the rest is iron Elements and unavoidable impurities. Strictly control the content of P and S in the molten steel during smelting, and refining through RH and LF furnaces; during continuous casting, full protection pouring is used, sealing rings are added, argon is pre-blown in the tundish, and low carbon covering agent is used; the rough rolling temperature is 1120 ℃, the rough rolling is three passes, the reduction ratios of each pass are 49.1%, 45.2%, and 43.3% respectively, the finish rolling temperature is 1030℃, and the final rolling temperature is 920℃. Then coiling is performed, and the coiling temperature is 500°C. The coiled steel strip is rolled into shape according to the above method, and the thickness of the obtained steel strip is 3.5 mm; then, high-temperature annealing is adopted, the annealing temperature...

Embodiment 2

[0027] Smelt molten steel according to the following components (by mass percentage): 0.02% C, 0.024% Si, 0.18% Mn, 0.004% N, 0.010% P, 0.009% S, 0.04% Alt, the rest is iron Elements and unavoidable impurities. Strictly control the content of P and S in molten steel during smelting, and refining through RH and LF furnaces; during continuous casting, full protection pouring is used, sealing rings are added, argon is pre-blown in the tundish and low-carbon coating agent is used; the rough rolling temperature is 1140 ℃, the rough rolling is four passes, the reduction ratios of each pass are 38.0%, 35.3%, 37.2%, 36.5%, the finish rolling temperature is 1045℃, and the final rolling temperature is 940℃. The coiling temperature is 510°C. The coiled steel strip is rolled into shape according to the above method, and the thickness of the obtained steel strip is 3.3 mm; high temperature annealing is adopted, the annealing temperature is 720° C., and the annealing time is 12 hours. The ...

Embodiment 3

[0029] Smelt molten steel according to the following ingredients (by mass percentage): 0.03% C, 0.028% Si, 0.20% Mn, 0.005% N, 0.012% P, 0.010% S, 0.05% Alt, the rest is iron Elements and unavoidable impurities. Strictly control the content of P and S in molten steel during smelting and refining through RH and LF furnaces; during continuous casting, full protective pouring is used, sealing rings are added, argon is pre-blown in the tundish and low-carbon covering agent is used; the rough rolling temperature is 1160 ℃, the rough rolling is five passes, the reduction ratios of each pass are: 30.0%, 30.8%, 30.4%, 36.9%, 30.2%, the finishing rolling temperature is 1060℃, and the final rolling temperature is 960℃. The coiling temperature is 520°C. The coiled steel strip is rolled into shape according to the above method, and the thickness obtained is 3.2 mm; high temperature annealing is adopted, the annealing temperature is 740° C., and the annealing time is 13 hours. The propert...

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Abstract

The invention discloses a cold-rolling steel belt for a flux-cored wire and a manufacture method thereof. The manufacture method for the cold-rolling steel belt for a flux-cored wire successively comprises: steelmaking, continuous casting, hot rolling, coiling, cold rolling and annealing, wherein in the step of hot rolling, the rough rolling temperature is 1120-1160 DEG C, the finish rolling temperature is 1030-1060 DEG C, and the final rolling temperature is 920-960 DEG C; in the step of low-temperature coiling performed after the step of hot rolling, the coiling temperature is 500-520 DEG C; and in the step of annealing, the annealing temperature is 700-740 DEG C, and the holding time is more than 10 hours. The method provided by the invention can be used for manufacturing the cold-rolling steel belt for a flux-cored wire, which has low yield ratio, high elongation rate, simple production technology, stable performance and low production cost.

Description

Technical field [0001] The invention belongs to the field of metal materials, and particularly relates to a method for manufacturing a cold-rolled steel strip for high-performance flux-cored welding wire. Background technique [0002] Flux-cored welding wire is a type of consumable material specially used for welding in powder-cored wire. It is a new type of welding material after welding rod and solid copper-plated welding wire. The flux-cored wire consists of two parts: a metal sheath and a powder core. The material of the sheath can be selected from low-carbon steel, stainless steel, aluminum, copper, zinc and other materials with a certain degree of ductility. The material of the powder core can be varied according to the needs of the product. Choose from various metal and non-metal powders, mineral powders, chemical products, and nano materials. [0003] Since the pickling and alkaline washing processes are eliminated in the manufacturing process of the flux-cored welding wir...

Claims

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Application Information

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IPC IPC(8): C21D8/02C22C38/04
Inventor 许荣昌陈豪卫周来军
Owner SHANDONG IRON & STEEL CO LTD
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