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High-compression-resistance spheroidal graphite casting for compressor oil separation barrel

A technology of ductile graphite casting and compressor oil, which is applied in the field of cast iron, can solve the problems of high cost and complicated process, and achieve the effect of high elongation and excellent mechanical properties

Inactive Publication Date: 2022-03-25
宁国东方碾磨材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is not only complicated process, but also high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A high-pressure ductile graphite casting for compressor oil separator, its chemical composition includes: C: 3.62%, Si: 2.74%, Mn: 0.43%, Cu: 0.23%, Mg: 0.039%, Re: 0.024 %, S: 0.012%, P: 0.026%, and the rest are Fe and other unavoidable impurities; among them, [Si] / [Mn]+[Cu]=4.2, and [Cu] / [Mn]=0.53;

[0042] The manufacturing process of the high-pressure ductile graphite casting for the oil separator of the compressor is as follows: 52% of the total mass of the raw materials is pig iron, 20% of low-manganese scrap steel, 25% of the furnace charge and 3% of the artificial graphite recarburizer. Smelting in an electric furnace, specifically smelting scrap steel, artificial graphite recarburizer and returned materials in an intermediate frequency induction furnace, adding pig iron after melting, heating up to 1520°C, melting until melting, and standing for 10 minutes;

[0043] Cool the obtained molten iron to 1440°C and pour it into the ladle. During the pouring process, ...

Embodiment 2

[0048] A high-pressure ductile graphite casting for compressor oil separator, its chemical composition includes: C: 3.67%, Si: 2.68%, Mn: 0.41%, Cu: 0.23%, Mg: 0.041%, Re: 0.026 %, S: 0.017%, P: 0.029%, and the rest are Fe and other unavoidable impurities; among them, [Si] / [Mn]+[Cu]=4.2, and [Cu] / [Mn]=0.56;

[0049] The manufacturing process of the high-pressure ductile graphite casting for the oil separator of the compressor is as follows: Add 60% of the total mass of raw materials to pig iron, 10% of low-manganese scrap steel, 26% of returned furnace materials and 4% of artificial graphite recarburizer into medium-frequency induction Smelting in an electric furnace, specifically smelting scrap steel, artificial graphite recarburizer and returned materials in an intermediate frequency induction furnace, adding pig iron after melting, heating up to 1540°C, melting until melting, and standing for 8 minutes;

[0050] Cool the obtained molten iron to 1460°C and pour it into a lad...

Embodiment 3

[0055] A high-pressure ductile graphite casting for compressor oil separator, its chemical composition includes: C: 3.74%, Si: 2.73%, Mn: 0.36%, Cu: 0.19%, Mg: 0.039%, Re: 0.027 %, S: 0.015%, P: 0.022%, and the rest are Fe and other unavoidable impurities; among them, [Si] / [Mn]+[Cu]=5.0, and [Cu] / [Mn]=0.53;

[0056] The manufacturing process of the high-pressure ductile graphite casting for the oil separator of the compressor is as follows: 45% of the total mass of raw materials is pig iron, 30% of low-manganese scrap steel, 21% of returned furnace materials and 4% of artificial graphite recarburizer are added to the intermediate frequency induction Smelting in an electric furnace, specifically melting scrap steel, artificial graphite recarburizer and returned materials in an intermediate frequency induction furnace, adding pig iron after melting, heating up to 1500°C, melting until melting, and standing for 10 minutes;

[0057] Cool the obtained molten iron to 1450°C and pour...

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Abstract

The invention provides a high-compression-resistance spheroidal graphite casting for an oil separation barrel of a compressor. The spheroidal graphite casting comprises the following chemical components in percentage by mass: 3.5%-3.8% of C, 2.5%-2.8% of Si, 0.3%-0.5% of Mn, 0.1%-0.3% of Cu, 0.03%-0.05% of Mg, 0.02%-0.03% of Re, less than or equal to 0.035% of S, less than or equal to 0.05% of P and the balance of Fe and other inevitable impurities. The matrix structure of the spheroidal graphite casting is a mixture of pearlite and ferrite, the pearlite content is not lower than 25%, and the spheroidization rate is not lower than 90%. According to the high-compression-resistance spheroidal graphite casting for the compressor oil separation barrel, the formula of the spheroidal graphite casting is optimized on the basis of QT450-10, the tensile strength, the elongation and the hardness of the spheroidal graphite casting are obviously improved, and the high-compression-resistance spheroidal graphite casting is obviously superior to existing products.

Description

technical field [0001] The invention relates to the technical field of cast iron, in particular to a high-pressure-resistant nodular casting for a compressor oil separator barrel. Background technique [0002] Compressor oil barrels need multiple pressure tests and inspections, so castings are required to have high strength and good extensibility at the same time. At present, the national standard GB / T1348-2009 specifies 15 grades for the material of ductile iron, among which the commonly used ones are QT450-10, QT500-7, QT550-5, QT600-3, QT700-2, etc., but the strength of these cast iron materials When it is high, the plasticity is poor, and when the plasticity is high, the strength is low. With the increasing requirement of compressor oil separator barrel castings, the currently used nodular cast iron can no longer meet the requirements. It is hoped to have a nodular cast iron with high strength and certain plasticity. [0003] At present, the mechanical properties of so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10C22C37/04C22C33/10
CPCC22C37/10C22C37/04C22C33/10
Inventor 赵东凯明章林汪海宁刘伟杨霄
Owner 宁国东方碾磨材料股份有限公司