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Medium-hardness free-cutting wear resisting cast iron material and preparation method thereof

A wear-resistant cast iron and easy-cutting technology, which is applied in the industrial field, can solve the problems of unfavorable wear resistance, increased manufacturing cost, and difficult turning processing, etc., and achieve the effects of increased service life, good cutting performance, and improved wear resistance

Active Publication Date: 2013-09-11
SHAN XI TONGXIN LIANZHU PIPE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 3. The hardness of the outer wall and edge of the centrifugal cast pipe often exceeds HB250 (according to the process specification of the manufacturing company, it can reach HB290), which makes turning difficult, while the hardness of the center layer is about HB200, which is not conducive to resistance to wear
In order to overcome this disadvantage, some cylinder liner manufacturers have added processes such as laser quenching, but this will greatly increase the manufacturing cost

Method used

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  • Medium-hardness free-cutting wear resisting cast iron material and preparation method thereof
  • Medium-hardness free-cutting wear resisting cast iron material and preparation method thereof
  • Medium-hardness free-cutting wear resisting cast iron material and preparation method thereof

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preparation example Construction

[0033] The present invention also provides a preparation method for the above-mentioned cast iron material, which is implemented on the patented continuous casting equipment for hollow metal profiles with low plasticity (patent number: ZL200710018928.2, publication number: 101134231, publication date: 2008-03-05) ,Such as Figure 1-3 As shown, the difference from the original device is that on the upper side of the original water-cooled crystallizer 13, two 1000W ultrasonic generators are fixedly installed through the connection base a17 and the connection base b18, which are distributed at 90°, so that the longitudinal ultrasonic wave can It acts on the entire range of the molten iron column in the crystallizer, and the ultrasonic generator and its connecting wire with the controller are wrapped with asbestos cloth to prevent the molten iron from splashing and failing, including the following steps:

[0034] 1) Weigh the following components according to mass percentage: C: 3...

Embodiment 1

[0046] Weigh the following components according to mass percentage: C: 3.2%, Si: 2.8%, Mn: 0.8%, P: 0.3%, B: 0.05%, Ti: 0.12%, S≤0.1%, Fe is the balance, the above The total mass percentage of each component is 100%, and the above materials are melted into molten iron, and the melted molten iron is poured from the pouring cup into the intermediate frequency induction holding furnace, and the power of the intermediate frequency induction holding furnace is adjusted to keep the molten iron at 1350 ° C ± 10 ℃;

[0047] The dummy bar held by the traction roller is inserted into the crystallizer, and the lower end of the dummy bar with the inverted conical seeding head is inserted into the upper 1 / 3 depth of the crystallizer, and then the crystallizer is cooled by water;

[0048] Open the air pressure control cabinet, let the compressed air enter the furnace, press down the liquid level, and the molten iron enters the crystallizer through the liquid riser, and the liquid level heig...

Embodiment 2

[0053] Weigh the following components according to mass percentage: C: 3.4%, Si: 2.7%, Mn: 0.6%, P: 0.25%, B: 0.07%, Ti: 0.08%, S≤0.1%, Fe is the balance, the above The total mass percentage of each component is 100%, and the above materials are melted into molten iron, and the melted molten iron is poured from the pouring cup into the intermediate frequency induction holding furnace, and the power of the intermediate frequency induction holding furnace is adjusted to keep the molten iron at 1350 ° C ± 10 ℃;

[0054] The dummy bar held by the traction roller is inserted into the crystallizer, and the lower end of the dummy bar with the inverted conical seeding head is inserted into the upper 1 / 3 depth of the crystallizer, and then the crystallizer is cooled by water;

[0055] Open the air pressure control cabinet, let the compressed air enter the furnace, press down the liquid level, and the molten iron enters the crystallizer through the liquid riser, and the liquid level hei...

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Abstract

The invention discloses a medium-hardness free-cutting wear resisting cast iron material comprising the following components by mass percentage: 3.2%-3.4% of C, 2.6%-2.8% of Si, 0.60%-0.90% of Mn, 0.25%-0.35% of P, 0.05%-0.1% of B, 0.08%-0.12% of Ti, less than or equal to 0.1% of S and the balance of Fe, wherein the sum of the mass percentage of all the components is 100%. By utilizing the medium-hardness free-cutting wear resisting cast iron material, annular, sleeve-shaped, and cylinder-shaped parts with the medium hardness can be directly turned on the premise of not increasing heat treatment annealing.

Description

technical field [0001] The invention belongs to the field of industrial technology, and relates to a wear-resistant cast iron material with medium hardness and easy cutting, and also relates to a preparation method of the material. Background technique [0002] For steel materials used in frictional occasions, hardness and cutting performance constitute a pair of contradictions that are difficult to reconcile. In order to efficiently and cheaply manufacture large quantities of steel standard parts with a wide range, material scientists have already invented free-cutting steel. However, in the research and development of free-cutting and wear-resistant cast iron materials, little progress has been made over the years. The existing patent "A High-Strength Free-cutting Cast Iron" (application number: 89101097.1, publication number: 1045279, publication date: 1990-09-12) improves the material strength by increasing the silicon-carbon ratio and reducing the Mn content , but its...

Claims

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Application Information

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IPC IPC(8): C22C37/10B22D11/00B22D11/114
Inventor 许旸
Owner SHAN XI TONGXIN LIANZHU PIPE IND