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Process for producing novel high chromium grinding ball

A production process, high chromium technology, applied in the field of wear-resistant material casting, can solve the problems of high chromium grinding ball residual stress, broken balls, etc., to solve the high chromium grinding ball fragile ball, improve toughness and strength, eliminate The Effect of Ball Breaking Phenomenon of High Chromium Cast Iron Grinding Ball

Inactive Publication Date: 2014-09-10
ANHUI XINNING EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to develop a new production process for high chromium grinding balls to solve the phenomenon of broken balls caused by high residual stress of high chromium grinding balls

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] A production process of a new type of high chromium grinding ball, the main process flow is: refining, pouring, inertia ball, metamorphic inoculation and other processes, among which;

[0012] The refining process is as follows: when the furnace material is melted to about 4%, argon blowing is carried out. The entire argon blowing time should be controlled at about 20 minutes, and the obtained molten iron is poured. The purity of the product can control the effect of the subsequent metamorphic inoculation treatment more stably;

[0013] The modification and inoculation treatment process is as follows: the bottom of the bag is used to pour into the hair, which has a good absorption rate for the additive; the steel ball is isothermally heat-treated at 560°C-650°C for 4-8 hours, and the residual austenite is transformed into a marsh The tenite finally achieves about 15% of the residual amount, and at the same time refines and changes the cast grain and metallographic struc...

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Abstract

The invention relates to a process for producing a novel high chromium grinding ball. The process mainly comprises the steps: refining, pouring, forming the ball and performing modification and inoculation, wherein in the refining process, argon blowing is performed when the furnace burden is melt down to be about 4 percent, the whole argon blowing time is controlled to be about 20 minutes, and the obtained molten iron is poured; the modification and inoculation process is that a steel ball is subjected to isothermal heat treatment at the temperature of 560-650 DEG C for 4-8 hours by adopting a bottom covering punching method. The process has the beneficial effects that a phenomenon that the high chromium grinding ball is broken is completely eliminated by adopting the process, and the toughness and strength of the grinding ball are further improved. Moreover, the process is simple and convenient to operate, the production cost is equivalent to that of a traditional process, the defect that the high chromium grinding ball is easily broken is completely overcome, and the process is tremendously popular in customers.

Description

technical field [0001] The invention belongs to the field of wear-resistant material casting and relates to a production process of a novel high-chromium grinding ball. Background technique [0002] The grinding balls produced by the traditional high chromium grinding ball production process mainly have broken balls in the production process or cracks in various grinding balls when used in the working environment. The main reason is the large residual stress of the grinding balls. This kind of residual stress is mainly derived from the thermal stress generated during the heating and cooling process of heat treatment. [0003] The invention aims to develop a new production process of high chromium grinding balls to solve the broken ball phenomenon caused by high residual stress of high chromium grinding balls. Contents of the invention [0004] The technical problem to be solved by the present invention is to overcome the existing technical defects and provide a new produc...

Claims

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Application Information

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IPC IPC(8): C22C33/08C22C37/06B22C9/22C21D9/36
Inventor 周道宏
Owner ANHUI XINNING EQUIP