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Nodular cast iron used for air conditioner compressor cylinder and preparing method of nodular cast iron

A technology of air-conditioning compressors and ductile iron, which is applied in mechanical equipment, machines/engines, liquid variable capacity machinery, etc., and can solve the problems of short life of air-conditioning compressor cylinders, large engine power consumption, and compressor no-load torque Large and other problems, to achieve the effect of light weight, high plasticity and prolong service life

Active Publication Date: 2016-10-26
江苏昊科汽车空调有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cylinder block is an important part of the air-conditioning compressor. The existing air-conditioning compressor cylinder has many defects: first, it is usually an iron core cylinder, which has a large dead weight and is inconvenient to use; Iron piston rings are required, so the coefficient of friction is large; third, the no-load torque of the compressor is large due to the high friction coefficient between the piston and the cylinder hole; Very big
[0003] The existing air conditioner compressor cylinder is generally made of ordinary iron material, which has poor wear resistance. Due to the high-speed rotation of the beveled wheel inside the air conditioner compressor, the conventional iron cylinder works in harsh environments, resulting in the life of the cast iron air conditioner compressor cylinder. not long

Method used

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  • Nodular cast iron used for air conditioner compressor cylinder and preparing method of nodular cast iron
  • Nodular cast iron used for air conditioner compressor cylinder and preparing method of nodular cast iron
  • Nodular cast iron used for air conditioner compressor cylinder and preparing method of nodular cast iron

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Comparison scheme
Effect test

Embodiment 1

[0027] Ductile iron for air conditioner compressor cylinder, including the following components in weight percentage: C 2.3%, Si 3.6%, Mn 0.46%, P 0.09%, S 0.01%, Cu 0.26%, Mg 0.88%, Ti 0.23 %, Sr 0.78%, Zr 0.68%, Cr 0.27%, B 0.46%, V 0.42%, Zn 0.76%, Re 0.18%, Sn 0.27%, Pb 0.68%, Be 0.12%, Sc 0.18%, Li 0.43 %, Ni.58%, La 0.03%, the rest is iron, and the sum of the mass percentages of each component is 100%.

[0028] The present invention also provides a method for preparing the above-mentioned nodular cast iron used for the cylinder body of an air-conditioning compressor, comprising the following steps:

[0029] (1) material selection: select materials according to the parts by weight of each element of nodular cast iron to be prepared;

[0030] (2) Smelting in a vacuum induction melting furnace and casting to obtain consumable electrode rods;

[0031] (3) Use a vacuum consumable remelting furnace to remelt the consumable electrode rod to obtain a remelted ingot of ductile ...

Embodiment 2

[0034]Ductile iron for air conditioner compressor cylinder, including the following components in weight percentage: C 2.8%, Si 4.6%, Mn 0.48%, P 0.11%, S 0.03%, Cu 0.28%, Mg 0.86%, Ti 0.21 %, Sr 0.76%, Zr0.66%, Cr 0.29%, B 0.50%, V 0.44%, Zn 0.78%, Re 0.16%, Sn 0.25%, Pb 0.66%, Be0.10%, Sc 0.20%, Li 0.45% %, Ni 0.56%, La 0.01%, the rest is iron, and the sum of the mass percentages of each component is 100%.

[0035] The present invention also provides a method for preparing the above-mentioned nodular cast iron used for the cylinder body of an air-conditioning compressor, comprising the following steps:

[0036] (1) material selection: select materials according to the parts by weight of each element of nodular cast iron to be prepared;

[0037] (2) Smelting in a vacuum induction melting furnace and casting to obtain consumable electrode rods;

[0038] (3) Use a vacuum consumable remelting furnace to remelt the consumable electrode rod to obtain a remelted ingot of ductile ...

Embodiment 3

[0041] Ductile iron for air conditioner compressor cylinder, including the following components in weight percentage: C 2.4%, Si 3.8%, Mn 0.46%, P 0.09%, S 0.01%, Cu 0.26%, Mg 0.88%, Ti 0.23 %, Sr 0.78%, Zr0.68%, Cr 0.27%, B 0.47%, V 0.42%, Zn 0.76%, Re 0.18%, Sn 0.27%, Pb 0.68%, Be0.12%, Sc 0.18%, Li 0.43 %, Ni.58%, La 0.03%, the rest is iron, and the sum of the mass percentages of each component is 100%.

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Abstract

The invention provides a nodular cast iron used for an air conditioner compressor cylinder. The nodular cast iron comprises, by weight percent, C, Si, Mn, P, S, Cu, Mg, Ti, Sr, Zr, Cr, B, V, Zn, Re, Sn, Pb, Be, Sc, Li, Ni, La and the balance iron, wherein the sum of the weight percent of all components is 100%; and the nodular cast iron comprises multiple nonmetal elements, metal elements and transition metal elements, the elements are added and matched, oxidization resistance, corrosion resistance, abrasion resistance and compressing and vibration resistance of the air conditioner compressor cylinder are improved, and accordingly, the service life of the air conditioner compressor cylinder under the poor working condition is prolonged.

Description

technical field [0001] The invention belongs to the field of metal materials, and in particular relates to a ductile cast iron used for a cylinder body of an air conditioner compressor, and also relates to a preparation method of the ductile iron. Background technique [0002] With the development of the automobile manufacturing industry, the research on automobile air conditioning technology is getting faster and faster. The car air-conditioning compressor is the core component. The car air-conditioning compressor usually uses a swash plate to rotate the piston for compression. The swash plate rotates at a high speed up to 3000 rpm. Good venting and sealing of the valve plate assembly is required. The cylinder block is an important part of the air-conditioning compressor. The existing air-conditioning compressor cylinder has many defects: first, it is usually an iron core cylinder, which has a large dead weight and is inconvenient to use; Iron piston rings are required, s...

Claims

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Application Information

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IPC IPC(8): C22C37/10C22C37/04F04B39/12
CPCC22C37/04C22C37/06C22C37/10F04B39/122
Inventor 曹靖
Owner 江苏昊科汽车空调有限公司
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