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Forging rough-rolling tool steel roller and manufacturing method thereof

A manufacturing method and tool steel technology, applied in the field of metallurgical rolls, can solve problems such as low strength, failure to meet rolling requirements, poor wear resistance, etc., and achieve the effect of improving thermal crack resistance and wear resistance

Inactive Publication Date: 2016-08-17
ANGANG STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The former has poor wear resistance and the latter has low strength, neither of which can meet the actual rolling requirements

Method used

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  • Forging rough-rolling tool steel roller and manufacturing method thereof
  • Forging rough-rolling tool steel roller and manufacturing method thereof
  • Forging rough-rolling tool steel roller and manufacturing method thereof

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Experimental program
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Effect test

Embodiment

[0035]

[0036]

[0037] The rest of the above-mentioned composition components are Fe and unavoidable impurities.

[0038] A method for manufacturing a forged rough-rolled tool steel roll, comprising the following steps:

[0039] 1) The tapping temperature of the electric arc furnace is controlled at 1600-1640°C, and then enters the LF refining furnace for smelting, adding lime 8-12kg / t, clay block 2-4kg / t, AD powder for slagging, and C+Si powder for reduction. In order to enhance the reduction effect, a small amount of Ca-Si powder can be used to maintain the reduction atmosphere. When the temperature of the refining furnace reaches 1700-1720°C (note that the temperature rises slowly to prevent the temperature drop during the VD process from being too large), VD treatment is performed, and the tapping temperature of the refining furnace is controlled at 1600-1600°C. 1650℃, cast into steel ingots, the pouring temperature is 1560~1565℃;

[0040] 2) Steel ingots are sent...

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Abstract

The invention relates to a forged rough-rolled tool steel roll and a manufacturing method, comprising the following chemical components in weight percent: C 0.65-0.75; Si 0.2-0.55; Mn 0.20-0.30; Cr 1.00-5.50; Ni 1-5.5; Mo 0.30-0.40; V 0.10-0.20; S≤0.015; P≤0.015; the rest are Fe and unavoidable impurities. Manufacturing method: LF furnace refining, heat treatment, hydraulic forging, post-forging heat treatment, quenching and tempering treatment, differential temperature quenching, and finished products in sequence. The advantages are: new alloy compounds are obtained through smelting technology, and new alloy compounds can improve the heat resistance of rolls. Crack and wear resistance, increase the strength of the roll through a reasonable forging ratio, and obtain a good structure with advanced differential temperature heat treatment.

Description

technical field [0001] The invention relates to a metallurgical roll, in particular to a forged rough-rolled tool steel roll used at the entrance of a rolling mill when producing hot-rolled strips and a manufacturing method. Background technique [0002] Hot continuous rolling roughing mills generally consist of 2-roll or 4-roll mills. Currently, one R1 two-roll mill and one 4-roll mill are the most commonly used roughing mills. Considering the construction cost of some enterprises, the roughing mill only consists of one 4-high rolls, no matter R1 two-high mill rolls or 4-high mill work rolls, have a certain billet opening effect, and the rolling temperature is high (generally above 1100 ° C), requiring high thermal cracking resistance and wear resistance of the rolls . In particular, the R1 two-roll rolling mill also has high strength. Currently. Rough rolling R1 roll material generally adopts ordinary CrNiM 0 Forged steel rolls and tool steel cast steel rolls. The for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/46C21D8/06B21B27/02B23P15/00
Inventor 徐延强李凯杜立朝于海滨王文昌王建
Owner ANGANG STEEL CO LTD
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