High-hardness wear-resistant cast iron and preparation method thereof

A technology of wear-resistant cast iron and high hardness, which is applied in the field of metal materials, can solve the problems of poor wear resistance of materials, and achieve the effect of improving hardness and wear resistance, high hardness and good wear resistance

Inactive Publication Date: 2020-11-06
CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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Problems solved by technology

Because the cast iron contains more than 20% Cr, the hardness of the cast iron after air-

Method used

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  • High-hardness wear-resistant cast iron and preparation method thereof

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[0030] The present invention will be further described in detail below in conjunction with the embodiments.

[0031] Examples 1 to 5 are the components of the high hardness and wear-resistant cast iron of the present invention. The specific components are shown in Table 1. The preparation process of the cast iron is:

[0032] 1) Smelting; manganese, chromium, vanadium, molybdenum, titanium, and tungsten are added into the smelting furnace in the form of their respective master alloys: ferromanganese, ferrochrome, ferrovanadium, ferromolybdenum, ferro-titanium and ferrotungsten, and nickel is in the form of pure nickel Join; first add ferromolybdenum, ferro tungsten, cast iron, steel and part of ferrochrome and vanadium to the bottom of the induction melting furnace crucible. When the melting furnace is smelted, turn on the maximum power. After the alloy is completely melted, add pure nickel, ferro-titanium, Ferro-vanadium and the remaining ferrochromium and ferro-vanadium, and fina...

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Abstract

The invention relates to high-hardness wear-resistant cast iron. The high-hardness wear-resistant cast iron is characterized by comprising the following components in percentage by mass: 3.2-3.6wt% ofC, 0.3-0.7wt% of Si, 0.5-1.0wt% of Mn, 16-20wt% of Cr, 0.1-0.4wt% of Ni, 0.2-0.5wt% of Mo, 0.6-1.1wt% of W, 0.15-0.3wt% of V, 0.02-0.05wt% of Ti and the balance Fe and inevitable impurities. According to the high-hardness wear-resistant cast iron, carbon, silicon, manganese, chromium, nickel, molybdenum, tungsten, vanadium and titanium elements are added into the cast iron, and the contents of the carbon, silicon, manganese, chromium, nickel, molybdenum, tungsten, vanadium and titanium elements are controlled; tungsten and molybdenum are compounded and added to obtain a hard martensite austenite alloy matrix, so that the hardness and the wear resistance of the alloy are improved; and the vanadium and titanium elements refine the carbide size, so that castings with uniform performance areprepared, and therefore, the cast iron with high hardness and good wear resistance is realized.

Description

technical field [0001] The invention relates to metal materials, in particular to a high-hardness wear-resistant cast iron and a preparation method thereof. Background technique [0002] Ball mills are widely used in mining, metallurgy, cement production and other industries. They mainly use the high-speed rotating hammer to collide with the material to crush the material. The hammer is the key part and the part that is most prone to wear. At present, high-chromium cast iron is widely used in the industry to prepare hammer heads. However, due to the low hardness and poor wear resistance of the hammer head material, the hammer head is often severely worn, and even the surface peels off, which increases material consumption and increases manufacturing costs. At the same time Also reduces production efficiency. [0003] In order to increase the hardness of the existing wear-resistant cast iron, the content of Cr will be increased, and Cr will combine with Fe and C in the matri...

Claims

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Application Information

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IPC IPC(8): C22C37/10C22C37/08C22C33/08
CPCC22C33/08C22C37/08C22C37/10
Inventor 崔崇亮田野陈艳飞陈大辉朱鸿磊刘永强李冬梅聂景江
Owner CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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