Supporting roller with roughness keeping capability and manufacturing method thereof

A manufacturing method and technology for backup rolls, which are applied in the field of metallurgical roll manufacturing, can solve problems such as increasing production costs, rapid decay of roughness, and lowering production efficiency, and achieve the effects of reducing production costs, improving roughness retention capability, and improving production efficiency.

Active Publication Date: 2012-08-15
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

5% Cr forged steel backup rolls can meet the production needs of ordinary plates, but when matching high wear-resistant work rolls (or intermediate rolls) to produce high-surface quality plates such as automotive outer panels and home appliance panels, it exposes the problem of rapid roughness attenuation. Problem, when the roughness Ra value decays to less than 0.1μm (for a unit on site), it will cause slippage between the

Method used

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  • Supporting roller with roughness keeping capability and manufacturing method thereof
  • Supporting roller with roughness keeping capability and manufacturing method thereof
  • Supporting roller with roughness keeping capability and manufacturing method thereof

Examples

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Embodiment Construction

[0032] The present invention will be described in further detail below in conjunction with the examples.

[0033] The process steps of the manufacturing method of each embodiment are basically the same as that of embodiment 1, and the differences are shown in Table 1.

[0034] Table 1

[0035]

[0036]

[0037] Due to the high melting point of NbC or TiC carbide particles, they will not melt in the subsequent heat treatment process after being precipitated from the liquid phase. At the same time, their hardness is also high, and they are prone to fall off during rolling wear, such as figure 1 with figure 2 As shown, friction scratches are formed on the surface of the back-up roll, so that the surface of the roller can maintain a certain level of roughness.

[0038] According to the material and manufacturing process of this embodiment, a φ1000mm × 1420mm physical backup roll was produced. The average hardness value of the roll surface was 68HSD. The double-ring rollin...

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Abstract

The invention discloses a supporting roller with a roughness keeping capability, comprising the following chemical components in mass percentage: 0.40-0.70% of C, 0.40-0.80% of Si, 0.50-0.80% of Mn, 4.5-5.5% of Cr, 0.40-1.00% of Mo, 0.30-0.50% of V, 0.40-0.60% of Ni. The supporting roller further comprises one or two of 0.05-0.30% of Nb and 0.05-0.30% of Ti, and residual amounts of Fe and unavoidable impurities. The invention further discloses a manufacturing method of the supporting roller; and the roughness keeping capability of the manufactured supporting roller is greatly improved.

Description

technical field [0001] The invention relates to the field of metallurgical roll manufacturing, in particular to a back-up roll for a strip cold rolling mill and a manufacturing method thereof. Background technique [0002] Large-scale strip mills are the key process equipment of modern metallurgical enterprises, and the back-up rolls are the key core components in the rolling mills, used to support the work rolls or intermediate rolls and enhance their rigidity. The performance of the backup roll directly determines the stability of the rolling mill, the smooth running of the production line, production consumption and product quality. [0003] At present, the high-grade back-up rolls of the cold rolling production lines of major steel mills mainly use 5% Cr forged steel series, the C content is between 0.4-0.6wt.%, and the Cr content is 2.0-5.0wt.%. In addition, it contains a small amount of Alloying elements such as Mo and V. 5% Cr forged steel backup rolls can meet the ...

Claims

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Application Information

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IPC IPC(8): C22C38/50C22C38/48C22C38/46C21D9/38C21D1/18C21D1/34B21B29/00
Inventor 吴琼孙大乐温宏权李文霄
Owner BAOSHAN IRON & STEEL CO LTD
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