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Casting method for boron-phosphorus alloy cast iron

A technology of alloy cast iron and boron-phosphorus, which is applied in the field of boron-phosphorus alloy cast iron, can solve problems such as poor wear resistance and tensile resistance, reduced service life, troublesome maintenance, etc., and achieve excellent product performance, reasonable formula design, good resistance Effect of Abrasion and Tensile Properties

Inactive Publication Date: 2016-08-24
李幼月
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AI Technical Summary

Problems solved by technology

[0002] Existing cylinder blocks of air compressors are made of alloy cast iron. The main disadvantages are poor wear resistance and tensile resistance. Frost cracks will occur in severe cold conditions, which will bring trouble to maintenance and reduce the service life.

Method used

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Effect test

Embodiment Construction

[0023] Raw and auxiliary materials - pig iron, scrap steel - electric furnace smelting - tapping inoculation, flow inoculation - filtering and pouring - finished cylinder block.

[0024] In order to meet the requirements of boron-phosphorus alloy cast iron, it is required that the furnace charge must be pure, high-quality pig iron should be selected, impurities such as C, SI, Mn, P, S, B in raw materials must be controlled at the lowest level, and the content of impurity elements in scrap steel must be controlled at the lowest level . Its weight ratio per percentage is: C-3.19, SI-2.24, Mn-0.79, P-0.272, S-0.082, B-0.039, Fe-94.

[0025] Its electric furnace melting adopts 12T medium frequency induction furnace to melt, heat the charge to 1500-1520°C, after testing, adjust the composition to 1450-1460°C, control the pouring temperature at 1350±10°C, and cast it into the air compressor cylinder block.

[0026] The invention is suitable for making cylinder blocks of air compres...

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PUM

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Abstract

The invention discloses a casting method for boron-phosphorus alloy cast iron. The boron-phosphorus alloy cast iron is mainly composed of Fe, C, Si, Mn, P, S and B and comprises, by weight percent, 94% of Fe, 3%-4% of C, 2%-3% of Si, 0.5%-1.0% of Mn, 0.1%-0.5% of P, 0.05%-0.1% of S and 0.03%-0.05% of B. The manufacturing method comprises the steps of raw and auxiliary material selecting, pig iron and steel scrap selecting, electric furnace smelting, tapping inoculation and following inoculation, filtration pouring and finished air cylinder body obtaining. The casting method is suitable for manufacturing an air cylinder body of an air compressor.

Description

technical field [0001] The invention relates to a boron-phosphorus alloy cast iron, in particular to a casting method of the boron-phosphorus alloy cast iron used for a cylinder block. Background technique [0002] Existing cylinder blocks of air compressors are made of alloy cast iron. The main disadvantages are poor wear resistance and tensile resistance. Frost cracks will occur under severe cold conditions, which will cause trouble for maintenance and reduce the service life. . Contents of the invention [0003] The object of the present invention is to provide a method for casting boron-phosphorus alloy cast iron used in cylinder blocks of air compressors, aiming at the shortcomings of the alloy cast iron mentioned above. [0004] In order to achieve the above object, the present invention is implemented mainly by adopting the following technical solutions. The composition of boron-phosphorus alloy cast iron of the present invention is mainly made up of Fe, C, Si, Mn...

Claims

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Application Information

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IPC IPC(8): C22C37/10
Inventor 李幼月
Owner 李幼月
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