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Preparation method of cast iron roller of pinch roll of recoiler

A pinch roll and coiler technology, applied in the field of strip steel rolling production equipment in the metallurgical industry, can solve the problems of limited thickness of the working layer, sticking steel on the surface of the roll, poor thermal shock resistance, etc., and achieve long service life, Good room temperature, conducive to the effect of tissue production

Active Publication Date: 2016-11-09
湖北精利机电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods cannot fundamentally solve the problems of steel sticking on the surface of the roller, poor thermal shock resistance and limited thickness of the working layer.

Method used

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  • Preparation method of cast iron roller of pinch roll of recoiler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) By weight percentage: C 2.5, Ni 0.5, Cr 3.8, Si 3.0, Nb 1.5, Mn 1.5, Mo 2.2, Cu0.1, W0, and the balance is Fe for ingredients; get commercially available pig iron with a purity of 99.9% metallic nickel, 99.9% pure metallic copper, 60% Cr ferrochrome, 75% Nb ferroniobium, 60% Mn ferromanganese, 60% Mo ferromolybdenum, 75% Si ferrosilicon , put into induction melting electric furnace, melted into alloy cast iron melt at 1450℃;

[0030] 2) Superheat the alloy cast iron melt obtained in step 1) to 1500°C, keep it warm for 30 minutes, and remove the surface slag; after that, adjust the temperature of the alloy cast iron melt to 1400°C;

[0031] 3) Remove the surface slag from the alloyed cast iron melt in step 2), add 0.5% Si in the form of ferrosilicon (75Si-Fe) in the ladle to obtain C 2.5, Ni 0.5, Cr 3.8, Si 3.5, Nb 1.5, Mn 1.5, Mo 2.2, Cu0.1, W0, alloy cast iron liquid with the balance being Fe; pouring out of induction melting electric furnace;

[0032] 4) Spray 1-...

Embodiment 2

[0038] 1) By weight percentage: C3.6, Ni5.0, Cr0.1, Si 1.0, Nb0.2, Mn 0.5, Mo 0.1, Cu 0.3, W1.7, and the balance is Fe for ingredients; Pig iron for sale, metallic nickel with a purity of 99.9%, metallic copper with a purity of 99.9%, metallic tungsten with a purity of 99.8%, ferrochromium with 60% Cr, ferro-niobium with 75% Nb, ferromanganese with 60% Mn, ferromanganese with 60% 60% Mo ferromolybdenum and 75% Si ferrosilicon are put into induction melting electric furnace and melted into alloy cast iron melt at 1450°C;

[0039] 2) Superheat the alloy cast iron melt obtained in step 1) to 1550°C, keep it warm for 20 minutes, and remove the surface slag; after that, adjust the temperature of the alloy cast iron melt to 1450°C;

[0040] 3) Remove the surface slag from the alloyed cast iron melt in step 2), and add 0.5% Si in the form of ferrosilicon (75Si-Fe) in the ladle to obtain C3.6, Ni 5.0, Cr0.1, Si 1.5 , Nb0.2, Mn0.5, Mo 0.1, Cu0.3, W 1.7, and the balance is Fe alloy cas...

Embodiment 3

[0046] 1) By weight percentage: C3.0, Ni3.0, Cr0.6, Si 2.0, Nb2.7, Mn 3.5, Mo 1.0, Cu 0.6, W0.5, and the balance is Fe for ingredients; Pig iron for sale, metallic nickel with a purity of 99.9%, metallic copper with a purity of 99.9%, metallic tungsten with a purity of 99.8%, ferrochrome containing 60% Cr, ferroniobium containing 75% Nb, ferromanganese containing 60% Mn, ferromanganese containing 60% Mo ferromolybdenum and 75% Si ferrosilicon are put into induction melting electric furnace and melted into alloy cast iron melt at 1450°C;

[0047] 2) Superheat the alloy cast iron melt obtained in step 1) to 1530°C, keep it warm for 25 minutes, and remove the surface slag; after that, adjust the temperature of the alloy cast iron melt to 1420°C;

[0048] 3) Remove the surface slag from the alloyed cast iron melt in step 2), and add 0.5% Si in the form of ferrosilicon (75Si-Fe) in the ladle to obtain C3.0, Ni 3.0, Cr0.6, Si 2.5 , Nb2.7, Mn3.5, Mo 1.0, Cu0.6, W 0.5, and the balanc...

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Abstract

The invention relates to a preparation method of a cast iron roller of a pinch roll of a recoiler. The preparation method comprises the following steps that 2.5-3.6 percent by weight of C, 0.5-5.0 percent by weight of Ni, 0.1-3.8 percent by weight of Cr, 1.0-3.0 percent by weight of Si, 0.2-2.7 percent by weight of Nb, 0.5-3.5 percent by weight of Mn, 0.1-2.2 percent by weight of Mo, 0.1-1.2 percent by weight of Cu, 0-1.7 percent by weight of W, less than 0.05 percent by weight of P, less than 0.06 percent by weight of S and the balance of Fe are melted at 1,450 DEG C in an induction melting electric furnace to obtain a melt; the melt is superheated to 1,500-1,550 DEG C, and is thermally insulated for 20-30 min, slag on the surface of the melt is removed, and the temperature of the melt is regulated to 1,400-1,450 DEG C; 0.5 percent of Si when the melt is discharged from the induction melting electric furnace; the melted solution is poured in a preheated centrifugal casting mold for casting; and the cast is cooled and solidified to obtain the alloy cast iron roller. The alloy cast iron roller is heat-resistant, wear-resistant, and is long in service life, and low in cost; and moreover, steel is not stuck on the alloy cast iron roller.

Description

technical field [0001] The invention belongs to the field of strip steel rolling production equipment in the metallurgical industry, and in particular relates to a method for preparing a cast iron roll for a coiler pinch roll. Background technique [0002] The coiler is the terminal equipment on the hot rolling production line, which rolls the strip into coils after hot rolling. The key components of the coiler are the upper and lower pinch rollers, their quality and precision determine the quality and yield of the coiled steel plate. Under the combination of high temperature, high pressure, high speed, impact, and severe wear of the steel plate in the coiling equipment, the pinch roll is more prone to failure modes such as wear, cracking, and block loss, which seriously affects the quality of the steel plate, and Working cycle of coiling equipment and production line. The anti-stick steel and wear resistance of the pinch roll surface are the key to improving the service l...

Claims

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Application Information

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IPC IPC(8): C22C37/10C22C37/08C22C33/08B22D13/00
CPCB22D13/00C22C33/08C22C37/08C22C37/10
Inventor 许嘉雄安萍
Owner 湖北精利机电科技有限公司
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