Alloy material for valve casting and processing process thereof

A technology of alloy material and processing technology, which is applied in the field of valve casting alloy material and its processing technology, can solve the problems of poor high temperature resistance, low wear resistance, short service life, etc., to improve comprehensive performance and wear resistance Ability, the effect of improving the service life

Active Publication Date: 2015-02-18
YANCHENG OAK VALVE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the application of valves plays a key role in many fields, because the use environment of the valve is affected by its material, and the valve also has defects, such as: low abrasion resistance, poor high temperature resistance, low strength, short service life, etc. , in view of these defects, the present invention proposes an alloy material for valve casting and its treatment process, which improves the friction resistance and high temperature resistance of the valve, increases its strength and service life, and reduces the cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment provides an alloy material for valve casting, the mass percentage of the chemical composition of the alloy material is: C: 0.2%, Si: 0.1%, Mn: 0.5%, P: 0.015%, S: 0.010%, Cr: 0.20%, Ni: 0.12%, Mo: 0.1%, Cu: 0.05%, V: 0.02%, rare earth: 0.12%, the rest is Fe and trace impurities;

[0029] Among the rare earths, the following components are included by weight percentage: Eu: 5.3%, Pr: 12.4%, Dy: 3.6%, Ac: 7.6%, Nd: 5.8%, Sm: 11.5%, Ce: 15.3%, Lu: 13% , and the balance is La; the present embodiment also provides the processing technology for the alloy material used for valve casting:

[0030] Step (1): During the smelting process of the electric arc furnace, first raise the furnace temperature to 350°C and then add the alloy material, then heat to 1200°C and keep it for 1 hour;

[0031] Step (2): After refining in LF furnace, the refining temperature is 1680°C, the composition is fine-tuned, and the time is 2 hours, blowing nitrogen gas and stirring throug...

Embodiment 2

[0036] This embodiment provides an alloy material for valve casting, the mass percentage of the chemical composition of the alloy material is: C: 0.25%, Si: 0.2%, Mn: 0.6%, P: 0.02%, S: 0.02%, Cr: 0.30%, Ni: 0.25%, Mo: 0.15%, Cu: 0.15%, V: 0.025%, rare earth: 0.13%, the rest is Fe and trace impurities;

[0037] Among rare earths, the following components are included by weight percentage: Eu: 5.4%, Pr: 12.5%, Dy: 3.7%, Ac: 7.7%, Nd: 5.9%, Sm: 11.6%, Ce: 15.4%, Lu: 14% , and the balance is La; the present embodiment also provides the processing technology for the alloy material used for valve casting:

[0038] Step (1): During the smelting process of the electric arc furnace, first raise the furnace temperature to 450°C and then add the alloy material, then heat to 1500°C and keep the temperature for 2 hours;

[0039] Step (2): After refining in LF furnace, the refining temperature is 1720 ° C, the composition is fine-tuned, the time is 3 hours, the whole process is blown with...

Embodiment 3

[0044] This embodiment provides an alloy material for valve casting, the mass percentage of the chemical composition of the alloy material is: C: 0.3%, Si: 0.3%, Mn: 0.8%, P: 0.030%, S: 0.025%, Cr: 0.50%, Ni: 0.35%, Mo: 0.2%, Cu: 0.25%, V: 0.03%, rare earth: 0.15%, the rest is Fe and trace impurities;

[0045] Among the rare earths, the following components are included by weight percentage: Eu: 5.5%, Pr: 12.6%, Dy: 3.9%, Ac: 7.8%, Nd: 6.0%, Sm: 11.8%, Ce: 15.5%, Lu: 15% , and the balance is La; the present embodiment also provides the processing technology for the alloy material used for valve casting:

[0046] Step (1): During the smelting process of the electric arc furnace, first raise the furnace temperature to 400°C, then add the alloy material, then heat to 1300°C, and keep the temperature for 1.5h;

[0047] Step (2): After refining in LF furnace, the refining temperature is 1690°C, the composition is fine-tuned, and the time is 2.5 hours. Nitrogen is blown and stirred...

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Abstract

The invention discloses an alloy material for valve casting. The alloy material comprises the following chemical components in percentage by mass: 0.2-0.3% of C, 0.1-0.3% of Si, 0.5-0.8% of Mn, 0.015-0.030% of P, 0.010-0.025% of S, 0.20-0.50% of Cr, 0.12-0.35% of Ni, 0.1-0.2% of Mo, 0.05-0.25% of Cu, 0.02-0.03% of V, 0.12-0.15% of rear earth and the balance of Fe and trace impurities. The invention further discloses a processing process of the alloy material for valve casting. The alloy material improves the corrosion resistance, the wear resistance and the oxidation resistance of a valve, so that the valve can be adapted to various harsh working environments and has high strength; the alloy material is long in service life, the cost is reduced, and the heat temperature resistance is improved.

Description

technical field [0001] The invention relates to an alloy material used for valve casting, in particular to an alloy material used for valve casting and its treatment process. Background technique [0002] At present, the application of valves plays a key role in many fields, because the use environment of the valve is affected by its material, and the valve also has defects, such as: low abrasion resistance, poor high temperature resistance, low strength, short service life, etc. In response to these defects, the present invention proposes an alloy material for valve casting and its treatment process, which improves the friction resistance and high temperature resistance of the valve, increases its strength and service life, and reduces costs. Contents of the invention [0003] The technical problem to be solved by the present invention is to propose an alloy material for valve casting and its treatment process, which not only improves the corrosion resistance, wear resist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/46C21D6/00
CPCC21D6/004C22C33/04C22C38/005C22C38/02C22C38/04C22C38/18C22C38/40C22C38/42C22C38/44C22C38/46
Inventor 张斌
Owner YANCHENG OAK VALVE CO LTD
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