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Casting technique of casting roll surface nano modification

A nano-modification and casting process technology, applied in the field of roll casting process, can solve the problems of low roll strength, hardness, thermal fatigue strength, complex heat treatment process, secondary pollution of alloys, etc., to simplify the heat treatment process and the process method. Controlled, high-purity effects

Inactive Publication Date: 2008-08-27
MCC XIANGTAN HEAVY IND EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional composite roll production technology produces rolls with low strength, hardness, and thermal fatigue strength, and the subsequent heat treatment process is complicated and consumes a lot of energy
There is the problem of secondary pollution of alloy to molten steel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Will AL 2 o 3 Nanomaterials and Zircon Powder, by AL 2 o 3 Nano material: zircon powder = 1: 10 batching, grind for 15 minutes with a roller compactor for casting to make nano coating powder for casting, add denatured alcohol to blend into 0.08Kg / liter casting coating, spray or brush the coating on On the surface of the mold, the molten steel is filled into the mold to make a casting roll.

Embodiment 2

[0010] Will AL 2 o 3 Nanomaterials and Bauxite Powders, by AL 2 o 3 Nano material: bauxite powder=1.2: 10 batching, grind 12 minutes with roller compactor for casting, make the nano-coating powder for casting, add water and mix and blend into 0.1Kg / liter casting coating, coating is sprayed or brushed on On the surface of the mold, the molten steel is filled into the mold to make a casting roll.

[0011] The casting roll made by the present invention is applied to the roller table equipment of the second phase production line of Xiangtan Iron and Steel Company. During inspection, the surface hardness of the casting roll on the roll table equipment is 30% higher than that of the first phase roll. The service life of the rolls in the first phase is increased by 60% compared with the first phase.

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PUM

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Abstract

The invention discloses a surface nano-modification process of a cast roller, which comprises the steps of mixing Al2O3 nanoparticles and refractory aggregate by a ratio of (1 to 12): 10; grinding by a rolling mill for casting for 10 to 15 min to obtain coating nanopowder for casting; adding industrial alcohol or water to prepare casting coating 0.08 to 0.1 Kg / L; spraying or applying the coating on the cast mold surface; and filling the cast mold with molten metal to obtain the cast roller. The surface nano-modification process has the advantages that the cast roller manufactured by the process has fine surface grain structure, improved hardness (improved by 30%), reduced size of inter-crystal inclusion (reduced by one order of magnitude), and significantly improved strength, rigidity and thermal fatigue strength in comparison with a conventional process product due to the enrichment of a nano-level high-hard phase particle layer on the surface layer. The service life of the roller is improved by 60% average. Since the surface high-hard phase particles are formed before curing the roller, the surface quenching process is simpler and controllable, the subsequent thermal treatment process is simplified, and the energy consumption is lowered. Due to the high purity of nanoparticles, the secondary contamination problem of molten steel caused by alloy can be solved.

Description

technical field [0001] The invention relates to a roll casting process. Background technique [0002] The traditional composite roll production technology produces rolls with low strength, hardness, and thermal fatigue strength, and the subsequent heat treatment process is complicated and consumes a lot of energy. There is a secondary pollution problem of the alloy to the molten steel. Contents of the invention [0003] The object of the present invention is to provide a casting process for nano-modification of the surface of casting rolls. [0004] The purpose of the present invention is achieved in the following way: the AL 2 o 3 Nanomaterials and refractory aggregates are formulated according to the ratio of nanomaterials: refractory aggregates = 1 to 1.2:10, ground for 10 to 15 minutes by a roller compactor for casting, and made into nano coating powder for casting, which is blended with industrial alcohol or water to form 0.08~0.1Kg / liter of casting paint, spray o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D19/16B22F9/04
Inventor 谢君阳鲍宇飞何国刚王国承
Owner MCC XIANGTAN HEAVY IND EQUIP
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