High-speed steel vertical roll ring and its preparation method

A high-speed steel and roll ring technology, applied in the direction of rolls, manufacturing tools, metal rolling, etc., can solve the problems of large wear on the surface of roll rings, poor quality of rail surface products, and small amount of steel passing through, and achieve wear resistance and passing through The effect of increasing the amount of steel

Active Publication Date: 2021-09-24
江苏凯达重工股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Domestic high-speed rail rolling lines all adopt high-speed rail finish rolling universal frame vertical roller rings to roll the rails. The existing vertical roller rings are usually made of semi-steel centrifugal material, and the amount of rolled steel is kept at about 4,000 tons. The surface wear of the roller ring is relatively large, the quality of the rolled rail surface product is poor, and the amount of passing steel is small

Method used

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  • High-speed steel vertical roll ring and its preparation method

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preparation example Construction

[0025] A method for preparing a high-speed steel vertical roll ring, comprising the following steps: Step 1: Prepare a rolled roll ring 1 by centrifugal casting; Step 2: Prepare a transmission roll ring 2 by static casting; Step 3: Roll the ring The assembly surface of the roll ring 1 and the drive roll ring 2 is finished, and then the rolling roll ring 1 is interference-fitted on the drive roll ring 2 to form a roll ring blank; step 4: process the roll ring blank to a finished product.

[0026] According to an embodiment of the present invention, the step 1 includes the following steps: S10, smelting 1: add a certain proportion of steel scrap, ferrochromium, ferromolybdenum, ferrovanadium, ferrotungsten, and ferrocobalt into the intermediate frequency furnace and melt the molten steel for rolling , heating the rolled molten steel to 1600-1650°C and keeping it warm for 10 minutes; S11, treatment outside the furnace: when the temperature of the rolled molten steel is lowered to ...

Embodiment 1

[0033] Prepare a 550 / 305×220mm hot-rolled 200*100H-shaped steel vertical roll ring, the target content of the rolling roll ring 1: C is 1.2-1.6%, Si is 1.0-1.5%, Mn is 0.3-0.8%, and Cr is 3.5-4.0%, Mo is 4.5-5.0%, V is 1.5-2.0%, W is 4.5-5.0%, Co is 1.5-2.0%, and the rest is Fe and unavoidable impurities. The driving roller ring 2 is obtained by integral static casting of high-toughness ferritic nodular cast iron. The chemical composition and percentage content of the driving roller ring 2 are 2.7-3.0% for C, 2.5-3.0% for Si, and 0.3-3.0% for Mn. 0.8%, Mg is 0.04-0.1%, and the rest is Fe and unavoidable impurities.

[0034] 1) Smelting: Add a certain proportion of steel scrap, ferrochrome, ferromolybdenum, ferrovanadium, ferrotungsten, and ferrocobalt into the intermediate frequency furnace, so that the chemical composition and weight percentage of the rolled molten steel meet the composition requirements before being released from the furnace: C is 1.4% , Si is 1.1%, Mn is 0...

Embodiment 2

[0043] Prepare a 460 / 280×180mm hot-rolled 150*100H-shaped steel vertical roll ring. The target content of the rolled roll ring 1: C is 1.2-1.6%, Si is 1.0-1.5%, Mn is 0.3-0.8%, and Cr is 3.5-4.0%, Mo is 4.5-5.0%, V is 1.5-2.0%, W is 4.5-5.0%, Co is 1.5-2.0%, and the rest is Fe and unavoidable impurities. The driving roller ring 2 is obtained by integral static casting of high-toughness ferritic nodular cast iron. The chemical composition and percentage content of the driving roller ring 2 are 2.7-3.0% for C, 2.5-3.0% for Si, and 0.3-3.0% for Mn. 0.8%, Mg is 0.04-0.1%, and the rest is Fe and unavoidable impurities.

[0044] 1) Smelting: Add a certain proportion of steel scrap, ferrochrome, ferromolybdenum, ferrovanadium, ferrotungsten, and ferrocobalt into the intermediate frequency furnace, so that the chemical composition and weight percentage of the rolled molten steel meet the composition requirements before being released from the furnace: C is 1.55% , Si is 1.11%, Mn is ...

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Abstract

The invention discloses a high-speed steel vertical roll ring and a preparation method thereof, comprising: a rolling roll ring and a transmission roll ring, the rolling roll ring is sleeved on the outside of the transmission roll ring, the chemical composition and weight of the rolling roll ring The percentage content is: C is 1.2‑1.6%, Si is 1.0‑1.5%, Mn is 0.3‑0.8%, Cr is 3.5‑4.0%, Mo is 4.5‑5.0%, V is 1.5‑2.0%, W is 4.5‑ 5.0%, Co is 1.5-2.0%, the rest is Fe and unavoidable impurities, the rolling ring is high-speed steel; the chemical composition and weight percentage content of the transmission roll ring are: C is 2.7-3.0%, Si is 2.5- 3.0%, Mn is 0.3‑0.8%, Mg is 0.04‑0.1%, the rest is Fe and unavoidable impurities, and the driving roller ring is high toughness ferritic nodular cast iron. In the present invention, by designing the reasonable components of the rolling roll ring and the driving roll ring, the surface hardness of the roll can reach 80-90HSD, which has high impact toughness, improves the service life, and avoids the occurrence of blocky shedding on the surface of the roll. The amount of steel passing through a single slot is more than 3 times higher than that of ordinary rolls.

Description

technical field [0001] The invention belongs to the technical field of rolls, and in particular relates to a high-speed steel vertical roll ring and a preparation method thereof. Background technique [0002] Domestic high-speed rail rolling lines all adopt high-speed rail finish rolling universal frame vertical roller rings to roll the rails. The existing vertical roller rings are usually made of semi-steel centrifugal material, and the amount of rolled steel is kept at about 4,000 tons. The surface wear of the roller ring is relatively large, the quality of the rolled rail surface product is poor, and the amount of passing steel is small. Contents of the invention [0003] The present invention aims to solve at least one of the technical problems existing in the prior art. [0004] Therefore, the present invention proposes a high-speed steel vertical roll ring, which has the advantages of high wear resistance and steel passing capacity. [0005] According to the embodi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/30C22C38/24C22C38/22C22C38/04C22C38/02C22C37/10C22C37/04C22C33/06B22D13/04C21D1/26C21D1/18C21D9/40C21C1/10B22C9/24B21B27/02B23P15/00
CPCB21B27/02B22C9/24B22D13/04B23P15/00C21C1/10C21D1/18C21D1/26C21D9/40C22C33/06C22C37/04C22C37/10C22C38/02C22C38/04C22C38/22C22C38/24C22C38/30
Inventor 许健周国祥花明
Owner 江苏凯达重工股份有限公司
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