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Centrifugal casting high-speed steel pinch roll and manufacturing method thereof

A technology of centrifugal casting and manufacturing method, applied in the field of roll manufacturing, can solve the problems of poor performance, high cost, short service life and the like

Active Publication Date: 2019-04-09
SINOSTEEL XINGTAI MACHINERY & MILL ROLL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the pinch rolls of hot strip mills are mostly made of cast steel or forged steel, and the working layer needs to be surfacing, which results in high cost and poor performance.
Some of the pinch rollers are made of high-nickel-chromium ductile iron and high-chromium cast iron, but due to poor wear resistance, the service life is short

Method used

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  • Centrifugal casting high-speed steel pinch roll and manufacturing method thereof

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Effect test

Embodiment 1

[0034] A centrifugal casting high-speed steel pinch roller, including a working layer and a ductile iron core, the weight percentage of each alloy composition in the working layer is: C: 1.0-1.2%, Si: 0.8-1.0%, Mn: 0.5-0.8 %, Cr: 4.0-6.0%, Ni: 0.3-0.5%, Mo: 4.0-6.0%, V: 2.0-3.0%, and the rest are Fe and unavoidable impurities.

[0035] A method for manufacturing a centrifugally cast high-speed steel pinch roller, specifically comprising the following steps:

[0036] a. Put the raw materials of the working layer and the core layer into an electric furnace for melting, the melting temperature of the working layer is 1400°C, and the melting temperature of the core is 1300°C;

[0037] In the working layer, the raw materials are placed in the induction furnace according to the proportion of the alloy composition and its weight percentage. The specific input raw materials are pig iron, scrap steel, ferromanganese, ferrochrome, ferronickel, ferromolybdenum, and ferrovanadium, which a...

Embodiment 2

[0044] A centrifugal casting high-speed steel pinch roller, including a working layer and a ductile iron core, the weight percentage of each alloy composition in the working layer is: C: 1.65-1.75%, Si: 0.85-0.95%, Mn: 1.1-1.2 %, Cr: 5.8-6.8%, Ni: 0.4-0.6%, Mo: 5.0-6.0%, V: 2.0-5.0%, and the rest are Fe and unavoidable impurities.

[0045] A method for manufacturing a centrifugally cast high-speed steel pinch roller, specifically comprising the following steps:

[0046] a. Put the raw materials of the working layer and the core layer into an electric furnace for melting, the melting temperature of the working layer is 1580°C, and the melting temperature of the core is 1480°C;

[0047] In the working layer, the raw materials are placed in the induction furnace according to the proportion of the alloy composition and its weight percentage. The specific input raw materials are pig iron, scrap steel, ferromanganese, ferrochrome, ferronickel, ferromolybdenum, and ferrovanadium, whi...

Embodiment 3

[0054] A centrifugal casting high-speed steel pinch roller, including a working layer and a ductile iron core, the weight percentage of each alloy composition in the working layer is: C: 1.8-2.0%, Si: 1.0-1.2%, Mn: 1.2-1.5 %, Cr: 6.0-8.0%, Ni: 0.5-0.8%, Mo: 6.0-8.0%, V: 4.0-5.0%, and the rest are Fe and unavoidable impurities.

[0055] A method for manufacturing a centrifugally cast high-speed steel pinch roller, specifically comprising the following steps:

[0056] a. Put the raw materials of the working layer and the core layer into an electric furnace for melting, the melting temperature of the working layer is 1600°C, and the melting temperature of the core is 1500°C;

[0057] In the working layer, the raw materials are placed in the induction furnace according to the proportion of the alloy composition and its weight percentage. The specific input raw materials are pig iron, scrap steel, ferromanganese, ferrochrome, ferronickel, ferromolybdenum, and ferrovanadium, which a...

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Abstract

The invention discloses a centrifugal casting high-speed steel pinch roll, and belongs to the field of roller manufacturing. The centrifugal casting high-speed steel pinch roll includes a working layer and a nodular cast iron core part, and the weight percentages of the alloy components of the working layer are as follows: 1.0-2.0% of C, 0.8-1.2% of Si, 0.5-1.5% of Mn, 4.0-8.0% of Cr, 0.3-0.8% ofNi, 4.0-8.0% of Mo, 2.0-5.0% of V and the balance Fe and unavoidable impurities. The manufacturing method of the centrifugal casting high-speed steel pinch roll includes smelting, centrifugal pouring,and heat treatment steps, and the heat treatment uses spherical annealing + quenching + tempering. By means of the centrifugal casting high-speed steel pinch roll and the manufacturing method thereof, the fact that the pinch roll has high wear resistance and high fatigue resistance is ensured.

Description

technical field [0001] The invention relates to the field of roll manufacturing, in particular to a high-speed steel pinch roll and a manufacturing method thereof. Background technique [0002] At present, the pinch rolls of hot strip rolling mills are mostly made of cast steel or forged steel, and the working layer needs to be surfacing, which is costly and poor in performance. Some high-nickel-chromium ductile iron and high-chromium cast iron are used to manufacture pinch rollers, but due to poor wear resistance, the service life is short. Contents of the invention [0003] The technical problem to be solved in the present invention is to provide a centrifugally cast high-speed steel pinch roller and its manufacturing method, so as to ensure that the pinch roller has high wear resistance and high fatigue resistance. [0004] In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is: [0005] A centrif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/44C22C38/46B22D13/00B22D19/16C21D9/38C21D1/32C21D1/18C21D1/10
CPCB22D13/00B22D19/16C21D1/10C21D1/18C21D1/32C21D9/38C22C38/02C22C38/04C22C38/44C22C38/46Y02P10/25
Inventor 尹秀芳杜旭景吴瑞光
Owner SINOSTEEL XINGTAI MACHINERY & MILL ROLL
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