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Method for producing martensite cast steel ball

A production method and technology of cast steel shot, which is applied in the production field of martensitic cast steel shot, can solve the problems of low fatigue resistance, low single furnace output, short service life, etc., and achieve improved fatigue resistance and single furnace production Large capacity and extended service life

Inactive Publication Date: 2008-11-12
山东传洋金属磨料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The harmful components such as sulfur and phosphorus in the steel shot alloy are difficult to reduce, resulting in poor quality of the steel shot, low fatigue resistance, and short service life. The maximum number of injections in use is only 2400-2500 times, and the performance is poor.
The operation of intermediate frequency furnace or electric arc furnace is relatively complicated, and the output of single furnace is also low

Method used

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Experimental program
Comparison scheme
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Embodiment Construction

[0017] The present invention is further described below.

[0018] When using high-pressure water for atomization and granulation to make steel shots, 0.25%-0.35% of the weight of molten steel is added to the tundish for deep deoxidation. In this way, oxygen and other harmful gases can be excluded, the density of steel shot can be increased, and the appearance of hollow shot can be reduced. In addition, after adding aluminum element, the oxidation resistance and acid corrosion resistance of the alloy can be improved.

[0019] The quenching furnace is a gas quenching furnace. This kind of gas quenching furnace has a furnace frame, and a tilting motor is fixed on the upper part of the furnace frame. One side of the furnace body is fixed on the shaft on the tilting motor, and the other side is installed on the furnace frame through a bearing seat. There is a furnace in the furnace body. One end of the furnace is connected with a steel shot inlet and outlet pipe, and the other en...

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Abstract

The invention provides a production method of martensite cast-steel shots, belonging to a production method of steel shot abrasive, which is characterized in that the production method comprises the steps as follows: heat preservation of molten steel in a blast furnace mixer, oxygen top-blown converter refining, high-pressure water pulverization and granulation, drying, rough separation, roundness selection, quenching, tempering, and handpicking, etc. The martensite cast-steel shots produced by the method have reasonable alloy components and low contents of harmful elements such as sulphur and phosphor, etc., thus improving the anti-fatigue capability of the steel shots and prolonging the service life of the steel shots; the maximum shotting time is improved by 300 to 400 times compared with the steel shots smelted and manufactured by the existing medium frequency furnace or electric arc furnace; furthermore, the operation is simple and the production capacity of the single furnace is large.

Description

technical field [0001] The invention provides a method for producing abrasives, in particular a method for producing steel shot abrasives. Background technique [0002] In the fields of metal surface cleaning, rust removal and strengthening, steel shot is required as abrasive. With the rapid development of the manufacturing industry, the market consumption of steel shot is increasing. Existing steel shot usually utilizes intermediate frequency furnace or electric arc furnace as smelting equipment to smelt, and then is made through granulation etc. Harmful components such as sulfur and phosphorus in the steel shot alloy are difficult to reduce, resulting in poor quality of the steel shot, low fatigue resistance, and short service life. The maximum number of sprays in use is only 2400-2500 times, and the performance is poor. The operation of intermediate frequency furnace or electric arc furnace is relatively complicated, and the output of single furnace is also low. Conte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08C22B9/00
Inventor 宫传洋
Owner 山东传洋金属磨料有限公司
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