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A thermal fatigue-resistant chilled roll material and its preparation method

A technology of anti-thermal fatigue and chilling roll, which is applied in metal material coating process, vacuum evaporation coating, coating, etc., can solve the problems of thermal fatigue of cooling roll, failure to meet the needs of industrialization, and short fatigue life, etc., to achieve The effect of relaxing the bonding strength of the film layer, refining the surface grains, and improving the thermal fatigue performance

Active Publication Date: 2019-01-01
GRIREM ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The methods adopted in the above several published Chinese patents have done a lot of work in controlling the cooling of the strip and the preparation of the coating film. However, when the rare earth permanent magnet is prepared by the rapid quenching method, the cooling roller always has the problem of thermal fatigue. The current Roll materials have a short fatigue life and cannot meet the needs of industrialization

Method used

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  • A thermal fatigue-resistant chilled roll material and its preparation method
  • A thermal fatigue-resistant chilled roll material and its preparation method
  • A thermal fatigue-resistant chilled roll material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] First, ultrasonically polish the peripheral surface of the copper roller (φ450mm×100mm) to a roughness of Ra0.05μm.

[0040] Subsequently, a Cu-T-Mo functionally graded film was prepared on the roller by magnetron sputtering deposition, and Cr was selected as the transition layer. Regarding the selection of the heating temperature of the substrate, the heating temperature of the functionally graded film in this example is 700°C. The Cu-Cr gradient film layer was first prepared on the Cu substrate, in which the sputtering power of the Cu target was gradually reduced from 200W to 80W, and the sputtering power of the Cr target was gradually increased from 80W to 200W to prepare the film layer 1, and then adjust the Cu The sputtering power of the target was reduced to zero, and a Cr monolayer film was prepared with a sputtering power of 200W, and finally a Cr-Mo gradient film was prepared, in which the sputtering power of the Cr target was gradually reduced from 200W to 80W...

Embodiment 2

[0044] First, ultrasonically polish the circumferential surface of the copper roller (φ450mm×100mm) to a roughness of Ra0.07μm.

[0045] Subsequently, a Cu-T-Mo functionally graded film was prepared on the roller by magnetron sputtering deposition, and Cr was selected as the transition layer. Regarding the selection of the heating temperature of the substrate, the heating temperature of the functionally graded film in this example is 700°C. The Cu-Cr gradient film layer was first prepared on the Cu substrate, in which the sputtering power of the Cu target was gradually reduced from 200W to 80W, and the sputtering power of the Cr target was gradually increased from 80W to 200W to prepare the film layer 1, and then adjust the Cu The sputtering power of the target was reduced to zero, and a Cr monolayer film was prepared with a sputtering power of 200W, and finally a Cr-Mo gradient film was prepared, in which the sputtering power of the Cr target was gradually reduced from 200W t...

Embodiment 3

[0049] First, ultrasonically polish the circumferential surface of the copper roller (φ450mm×100mm) to a roughness of Ra0.04μm.

[0050] Subsequently, a Cu-T-Mo functionally graded film was prepared on the roller by magnetron sputtering deposition, and Cr was selected as the transition layer. Regarding the selection of the heating temperature of the substrate, the heating temperature of the functionally graded film in this example is 700°C. The Cu-Cr gradient film layer was first prepared on the Cu substrate, in which the sputtering power of the Cu target was gradually reduced from 200W to 80W, and the sputtering power of the Cr target was gradually increased from 80W to 200W to prepare the film layer 1, and then adjust the Cu The sputtering power of the target was reduced to zero, and a Cr monolayer film was prepared with a sputtering power of 200W, and finally a Cr-Mo gradient film was prepared, in which the sputtering power of the Cr target was gradually reduced from 200W t...

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Abstract

The invention discloses a thermal fatigue resisting chilling roll material which comprises a base body and a film layer. The base body is made of metal materials. The surface roughness Ra of the base body is 0.01 micron to 0.1 micron. The grain size of the film layer is 0.1 micron to 2 microns. The number of grain boundaries of the surface of the roll material is increased through the refined surface grain size, and the thermal fatigue performance of the surface of the roll material is improved. The invention further discloses a preparing method for the thermal fatigue resisting chilling roll. The preparing method includes the following steps that firstly, polishing treatment is conducted on the surface of the base body; secondly, the film layer is prepared on the surface of the processed base body, and the preparing temperature is 200-800 DEG C; and thirdly, the roll material coated in the second step is annealed, the annealing temperature is 400-1000 DEG C, and the annealing time is 2-6 h. According to the chilling roll material, the combining strength of the film layer is ensured, meanwhile, surface grains are refined, the number of the grain boundaries of the surface of the roll material is obviously increased, thermal stress borne by a rolling wheel can be rapidly released, the thermal fatigue performance of the surface of the roll material is improved, the working period of the rolling wheel is prolonged, and the thermal fatigue chilling roll material has great significance on the industrial production for preparing rare earth permanent magnet materials through a rapid quenching method.

Description

Technical field: [0001] The invention relates to the field of mechanically processed cooling rolls, in particular to a thermal fatigue-resistant chilled roll material and a preparation method thereof. Background technique [0002] In the prior art, the Chinese patent with the notification number CN1308476C discloses a quenching alloy and magnetic powder, wherein the surface of the cooling roll is coated with chromium, nickel or their combined coating to control the cooling rate of alloy quenching. The Chinese patent whose publication number is CN1329954A discloses a kind of cooling roller, thin strip magnet material, magnet powder and bonded magnet, wherein by setting the ceramic coating layer near room temperature lower than the substrate on the surface of the roller matrix material, on the one hand, use To set the gas discharge means in the rapid quenching process, on the other hand, reduce the difference in cooling speed between the free surface of the rapid quenching str...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/06C23C14/16C23C14/02C23C14/58C23C16/06C23C16/02C23C16/56C23C24/10
Inventor 杨远飞于敦波李扩社罗阳闫文龙鲁帅毛永军谢佳君张洪滨
Owner GRIREM ADVANCED MATERIALS CO LTD
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