Water-cooling fast-setting control method of depth distribution of hard abrasive in magnetic abrasive metal matrix

Abstract

The invention provides a water-cooling fast-setting control method of depth distribution of hard abrasive in a magnetic abrasive metal matrix. The method is characterized in that the lower portion of an atomizing and cooling chamber of powder mixing gas atomizing fast-setting magnetic abrasive preparing equipment is filled with cooling water, the height of the water level of the cooling water in the atomizing and cooling chamber is adjusted by controlling the water input amount, by adjusting the height of the water level of the cooling water in the atomizing and cooling chamber, the flight distance of powder mixed molten metal drops is adjusted, then the cooling speed of the powder mixed molten metal drops is adjusted, and the powder mixed molten metal drops are cooled so that the hard abrasive can form the magnetic abrasive distributed on the surface shallow layer of a magnetic abrasive metal matrix; control over the depth of distribution of the hard abrasive on the surface shallow layer of the magnetic abrasive metal matrix is achieved; moreover, the flight distance of the powder mixed molten metal drops is shortened greatly, the overall height of an atomizing and condensing chamber and equipment is reduced, and equipment manufacturing cost is reduced; and meanwhile, by means of the shock chilling effect generated by water cooling and fast setting, bonding strength between the hard abrasive and the metal matrix is improved. The method is simple, stable, reliable and suitable for mass production of the high-performance magnetic abrasive.

Description

technical field [0001] The invention provides a water-cooled quick-setting control method for the depth distribution of hard abrasives in a magnetic abrasive metal matrix, and belongs to the technical field of preparation of magnetic abrasive materials. Background technique [0002] Due to the advantages of magnetic particle grinding and finishing technology: flexibility, self-adaptability, self-sharpening, controllability, small temperature rise, no tool wear compensation, no modification, high efficiency, etc., at the same time, magnetic particle grinding The finishing process also avoids the complex requirements for the grinding head structure, can realize the grinding and finishing process of complex curved surfaces and solve automation problems, and can reduce the cost of mold manufacturing, which has caused extensive research and product development in the world, and has been It has been applied in many occasions for grinding and finishing of plane, outer circular surf...

AI Technical Summary

Problems solved by technology

[0003] At present, the main problems of magnetic grinding and finishing are the low service life of magnetic abrasives, poor metal cutting ability, difficult preparation and high cost.

For this reason, the inventors invented the "preparation method of gas atomization fast setting magnetic abrasive" (ZL201010206408.6), "gas atomization fast setting magnetic abrasive preparation equipment" (ZL201110156753.8), "gas atomization fast setting method Structural and Morphological Control Method for the Preparation of Magnetic Abrasives" (ZL201110156741.5), and achieved good results in practice, but there are still some key technical problems that affect the quality of magnetic abrasive preparation, such as: due to the failure to solve the problem of molten magnetic abrasive liquid Condensation speed control of drops, the depth distribution of the hard abrasive in the metal matrix of the prepared magnetic abrasive has not been stable enough, the distribution is shallow, and the combination with the metal matrix is ​​not firm, resulting in low grinding performance and shortened service life, which directly affects the magnetic abrasive. Excellent grinding capacity, high scrap rate

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