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Low chromium cast grinding ball, and manufacturing method thereof

A technology for casting grinding balls and a manufacturing method, which is applied in the field of wear-resistant materials, can solve the problems of poor wear resistance of casting grinding balls, multi-distribution and unevenness of microscopic inclusions, etc., and achieves less distribution, improved service life, and formula. reasonable effect

Inactive Publication Date: 2014-10-08
NINGGUO ZHENGXING WEAR RESISTANT MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the production process of low chromium cast grinding balls, defects are prone to occur, and the microscopic inclusions are many and unevenly distributed, and the wear resistance of cast grinding balls is not very good.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A low-chromium casting grinding ball is characterized in that it includes the following chemical components in weight percentage: C3.60%, Si1.50%, Mn1.50%, Mo1.00%, Cr3.00%, Cu0.80%, S0.08%, P0.10%, and the balance is iron.

[0018] The manufacturing method of the low-chromium cast grinding ball is characterized in that it comprises the following steps:

[0019] (1) When a large amount of steel scrap and iron filings are used for smelting, clean and dry ordinary steel scrap, iron filings, stainless steel scrap, and carbon-increasing waste electrodes are added to the furnace, heated and melted, and the temperature is raised to 1450 ° C, and heat preservation agent is added for 2.5 After 1 hour, the molten iron obtained by smelting is inspected and analyzed, and the element ratio is carried out to the molten iron according to the inspection result;

[0020] (2) Modification treatment and pouring: place the modification agent on the bottom of the ladle with an iron sheet ...

Embodiment 2

[0025] A low-chromium casting grinding ball is characterized in that it includes the following chemical components in weight percentage: C2.10%, Si1.00%, Mn1.00%, Mo0.50%, Cr3.00%, Cu0.50%, S0.04%, P0.05%, and the balance is iron.

[0026] The manufacturing method of the low-chromium cast grinding ball is characterized in that it comprises the following steps:

[0027] (1) When a large amount of scrap steel and iron filings are used for smelting, clean and dry common scrap steel, iron filings, stainless steel scrap, and waste electrodes for carbon increase are added to the furnace, heated and melted, and the temperature is raised to 1400 ° C, and heat preservation agent is added for 2 After 1 hour, the molten iron obtained by smelting is inspected and analyzed, and the element ratio is carried out to the molten iron according to the inspection result;

[0028] (2) Modification treatment and pouring: place the modification agent on the bottom of the ladle with an iron sheet or...

Embodiment 3

[0033] A low-chromium casting grinding ball is characterized in that it includes the following chemical components in weight percentage: C3.00%, Mn0.50%, Cr2.00%, Cu0.30%, S0.01%, P0.01%, The balance is iron.

[0034] The manufacturing method of the low-chromium cast grinding ball is characterized in that it comprises the following steps:

[0035] (1) When a large amount of steel scrap and iron filings are used for smelting, clean and dry ordinary steel scrap, iron filings, stainless steel scrap, and carbon-increasing waste electrodes are added to the furnace, heated and melted, and the temperature is raised to 1420°C, and heat preservation agent is added for 2.4 After 1 hour, the molten iron obtained by smelting is inspected and analyzed, and the element ratio is carried out to the molten iron according to the inspection result;

[0036] (2) Modification treatment and pouring: place the modification agent on the bottom of the ladle with an iron sheet or tin foil paper, and p...

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Abstract

The invention relates to the technical field of wear-resistant materials, and discloses a low chromium cast grinding ball, and a manufacturing method thereof. The low chromium cast grinding ball comprises the following chemical components by weight: 2.10-3.60% of C, less than or equal to 1.50% of Si, less than or equal to 1.50% of Mn, less than or equal to 1.00% of Mo, 1.00-3.00% of Cr, less than or equal to 0.80% of Cu, less than or equal to 0.08% of S, less than or equal to 0.10% of P, and the balance being Fe. A formula provided by the invention is reasonable; and the manufacturing method is simple. The raw materials are kept at a constant temperature for 2-2.5 hours after being melted, so as to guarantee few inclusions and uniform distribution. The raw materials are easily available and common steel scrap, pig iron and stainless steel scrap are used as the raw materials and can be used circularly, so that energy can be effectively saved; molten iron is subjected to modified treatment, so that the toughness and strength of the cast grinding ball are increased and the service life of the cast grinding ball is prolonged; and no defect phenomenon appears in the manufacturing process.

Description

technical field [0001] The invention relates to the technical field of wear-resistant materials, in particular to a low-chromium cast grinding ball and a manufacturing method thereof. Background technique [0002] With the increasing demand for grinding balls in industries such as metallurgical mines, building materials, cement, thermoelectric coal grinding, chemical powder, nuclear material industry, non-ferrous metal raw materials and ironmaking blast furnace coal powder, the production scale of my country's grinding balls has developed rapidly. Melting equipment and casting technology have also been continuously improved. When low-chromium grinding balls are used in cement dry grinding operations, their wear resistance is 7-9 times that of ordinary steel; when they are used in mine wet grinding operations, they are 2-3 times that of ordinary steel balls. 1-1.5 times that of tempered steel balls. But at present, in the production process of low chromium cast grinding bal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10C22C37/06C22C33/08B22D1/00
Inventor 李根有李骏
Owner NINGGUO ZHENGXING WEAR RESISTANT MATERIALS
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