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Processing technology for copper alloy valve

A processing technology and copper alloy technology, which is applied in the processing technology field of copper alloy valves to achieve the effects of low raw material cost, small wall thickness error and smooth surface

Inactive Publication Date: 2019-01-11
SUZHOU SUTENG ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Anti-corrosion and anti-scaling alloy materials have the advantages of no magnetism, no electricity, no energy consumption, etc., but the existing anti-corrosion and anti-scaling alloy materials still need to be improved in terms of anti-corrosion and anti-scaling performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A processing technology for a copper alloy valve, comprising the following steps:

[0029] (1) Mold making: Make a mold according to the shape of the valve, and the mold is equipped with a riser and a gate;

[0030] (2) Molding sand molding: heat-resistant molding sand is used to make sand molds around the mold, and the mold is taken out to obtain sand molds; the sand molds are heated to 200-250°C for standby;

[0031] (3) Smelting: Put the raw materials in a three-phase electric arc furnace, raise the temperature to 1200-1350°C, transfer to a decarburization furnace, feed oxygen, and at the same time, add an inoculant to obtain an alloy melt; the raw materials are: copper 30 -35%, zinc 2-5%, nickel 3-4%, tin 2-3%, neodymium 1-2%, lanthanum 1-2%, aluminum 0.2-0.5%, silicon 0.2-0.4%, carbon 0.1-0.2 %, the rest are unavoidable impurities and iron; the addition of inoculant is 0.02%;

[0032] (4) Pouring: Pouring the alloy melt into the sand mold, the pouring temperature...

Embodiment 2

[0041] A processing technology for a copper alloy valve, comprising the following steps:

[0042] (1) Mold making: Make a mold according to the shape of the valve, and the mold is equipped with a riser and a gate;

[0043] (2) Molding sand molding: heat-resistant molding sand is used to make sand molds around the mold, and the mold is taken out to obtain sand molds; the sand molds are heated to 200-250°C for standby;

[0044] (3) Smelting: Put the raw materials in a three-phase electric arc furnace, raise the temperature to 1200-1350°C, transfer to a decarburization furnace, feed oxygen, and at the same time, add an inoculant to obtain an alloy melt; the raw materials are: copper 30 -35%, zinc 2-5%, nickel 3-4%, tin 2-3%, neodymium 1-2%, lanthanum 1-2%, aluminum 0.2-0.5%, silicon 0.2-0.4%, carbon 0.1-0.2 %, the rest are unavoidable impurities and iron;

[0045] (4) Pouring: Pouring the alloy melt into the sand mold, the pouring temperature is 1300-1400℃;

[0046] (5) Coolin...

Embodiment 3

[0054] A processing technology for a copper alloy valve, comprising the following steps:

[0055] (1) Mold making: Make a mold according to the shape of the valve, and the mold is equipped with a riser and a gate;

[0056] (2) Molding sand molding: heat-resistant molding sand is used to make sand molds around the mold, and the mold is taken out to obtain sand molds; the sand molds are heated to 200-250°C for standby;

[0057] (3) Smelting: Put the raw materials in a three-phase electric arc furnace, raise the temperature to 1200-1350°C, transfer to a decarburization furnace, feed oxygen, and at the same time, add an inoculant to obtain an alloy melt; the raw materials are: copper 30 -35%, zinc 2-5%, nickel 3-4%, tin 2-3%, neodymium 1-2%, lanthanum 1-2%, aluminum 0.2-0.5%, silicon 0.2-0.4%, carbon 0.1-0.2 %, the rest are unavoidable impurities and iron;

[0058] (4) Pouring: Pouring the alloy melt into the sand mold, the pouring temperature is 1300-1400℃;

[0059] (5) Coolin...

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Abstract

The invention discloses a processing technology for a copper alloy valve. The processing technology comprises several steps as follows: (1) mold production; (2) molding sand molding; (3) smelting; (4)pouring; (5) cooling; and (6) surface treatment: clearing the surface of the valve, cutting off projections such as a sprue, a riser, relief-grinding burrs and fins, clearing residual sand again, andspraying a protective agent on the surface of the valve to obtain the copper alloy valve. Heat-resistant molding sand is adopted in the processing technology disclosed by the invention, so that the produced valve is small in wall thickness errors, small in surface sand holes, few in internal porosity and shrinkage cavities and high in yield; sectional cooling is adopted, which is beneficial to improving the ductility of the alloy and the strength of the alloy; and the protective agent is sprayed on the surface of the valve after casting is completed, so that corrosion to the valve is reduced,and the service life of the valve is prolonged.

Description

technical field [0001] The invention relates to a processing technique for a copper alloy valve, belonging to the technical field of valve processing. Background technique [0002] The valve is a control component in the fluid delivery system, which has functions such as cut-off, adjustment, flow diversion, reverse flow prevention, pressure stabilization, flow diversion or overflow pressure relief. Valves are divided into cast iron valves, cast steel valves, stainless steel valves, chrome molybdenum steel valves, chrome molybdenum vanadium steel valves, duplex steel valves, plastic valves, non-standard custom valves and other valve materials according to the material. At present, in the steel casting industry, steel castings usually need to make molds, pour them, and then carry out post-processing of valves. Improper processing will easily produce cracks, sand holes, pores and other defects in the cast steel, which will affect the quality of the product. Therefore, , a reas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/06C22C38/08C22C38/16C22C33/04B22C1/00C21C7/04
CPCC22C38/16B22C1/00C21C7/04C22C33/04C22C38/002C22C38/005C22C38/008C22C38/02C22C38/06C22C38/08
Inventor 周天毫
Owner SUZHOU SUTENG ELECTRONICS TECH
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