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Copper alloy bar material for high-strength corrosion-resistant and wear-resistant valve parts and preparation method thereof

A copper alloy and corrosion-resistant technology, which is applied in the field of copper alloy bars for high-strength, corrosion-resistant and wear-resistant valve parts and their preparation, can solve the problems of unsatisfactory corrosion-resistant and wear-resistant properties, and achieve scientific and reasonable composition ratio and enhanced strength. and hardness, the effect of improving corrosion resistance

Active Publication Date: 2020-03-27
JINTIAN COPPER GROUP CORP NINGBO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The content of Ni and Al in this copper alloy is relatively high. Although the addition of rare earth elements has improved the strength and corrosion resistance, the corrosion resistance and wear resistance are not ideal enough to meet the requirements of valves in marine engineering. need

Method used

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  • Copper alloy bar material for high-strength corrosion-resistant and wear-resistant valve parts and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for preparing copper alloy rods for high-strength corrosion-resistant and wear-resistant valve parts. The steps are: adding raw materials to a smelting furnace to heat up and melt them. After all the melts are melted, the temperature of the melt is controlled at 1170° C. to remove impurities and gas by blowing and stirring. Add the slag-removing refining agent through the refining degasser, the blowing pressure of the degasser is controlled at 0.25MPa, the graphite rotor speed is controlled at 350r / min, the flow rate is 10L / min, the blowing gas is nitrogen, and the slag-removing refining agent is blown into 0.25% of the weight of molten copper. After standing still for 7 minutes, remove the slag.

[0028] Add 0.05% of melt weight lanthanum and strontium rare earth for refining treatment, the ratio of lanthanum and strontium is 5:3, the temperature of the melt is controlled at 1170°C, and it is transferred to the holding furnace after standing still for 5 minute...

Embodiment 2

[0035] A method for preparing copper alloy rods for high-strength corrosion-resistant and wear-resistant valve parts. The steps are: adding raw materials to a melting furnace to heat up and melt them. Add the slag-removing refining agent through the refining degasser, the blowing pressure of the degasser is controlled at 0.25MPa, the graphite rotor speed is controlled at 320r / min, the flow rate is 10L / min, the blowing gas is nitrogen, and the slag-removing refining agent is blown into The amount is 0.25% of the weight of the copper liquid. After standing still for 8 minutes, remove the slag.

[0036] Add 0.06% of melt weight lanthanum and strontium rare earth for refining treatment, the ratio of lanthanum and strontium is 5:3, control the temperature at 1180°C, and start to transfer to the holding furnace after standing still for 5 minutes.

[0037] When the temperature of the holding furnace reaches the casting temperature of 1195°C, horizontal continuous casting is used to ...

Embodiment 3

[0042] A method for preparing copper alloy rods for high-strength corrosion-resistant and wear-resistant valve parts. The steps are: adding raw materials to the melting furnace to heat up and melt, and after all the melts are melted, the temperature of the melt is controlled at about 1165°C to carry out blowing and stirring to remove impurities and degassing . Add the slag-removing refining agent through the refining degasser, the blowing pressure of the refining degasser is controlled at 0.25MPa, the graphite rotor speed is controlled at 350r / min, the flow rate is 10L / min, the blowing gas is nitrogen, and blown into the slag-removing refining agent The amount is 0.25% of the weight of the copper liquid. After standing still for 8 minutes, remove the slag.

[0043]Add 0.07% of melt weight lanthanum and strontium rare earth for refining treatment, the ratio of lanthanum and strontium is 5:3, control the temperature at 1175°C, and start to transfer to the holding furnace after ...

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Abstract

The invention provides a copper alloy bar for a high-strength corrosion-resistant wear-resistant valve element. The cooper alloy bar is characterized in that the copper alloy bar comprises, by weight,0.04-0.2% of Si, 0.25-0.6% of Mn, 0.1-0.4% of Sn, 0.06-0.2% of Ni, 0.7-1.3% of A1, 0.1-0.25% of Fe, 83-87% of Cu, 0.01-0.1% of lanthanum and strontium rare earth, and the balance Zn and inevitable trace impurities. The preparation method comprises the following steps of burdening and smelting; refining and removing impurities; degassing; adding lanthanum and strontium rare earth; carrying out horizontal continuous casting; drawing and extending a casting blank; peeling twice; and carrying out light pressing and straightening to obtain a finished product. The copper alloy component is scientific and reasonable in component ratio, and the prepared copper alloy has good machining performance and casting performance; and meanwhile, the alloy is high in strength and good in corrosion resistance and wear resistance, and can be applied to the manufacturing of the valve element of ocean engineering; the preparation process is simple and easy to operate; and the horizontal continuous casting is adopted, so that cracks caused by thermal stress are avoided, and the hot extrusion cracking problem of the casting blank is solved.

Description

technical field [0001] The invention belongs to the technical field of copper alloy materials and processes, and in particular relates to a copper alloy rod for high-strength corrosion-resistant and wear-resistant valve parts and a preparation method thereof. Background technique [0002] Valve parts refer to valves used for direction, pressure and control in hydraulic and pneumatic circuits. Commonly used valve materials are cast iron, stainless steel, carbon steel, copper alloy, ceramics, plastics, etc. With the development of marine engineering, the material selection requirements for marine valves, underwater valves and other devices are relatively high. Copper alloys are widely used in the field of valve body manufacturing due to their good mechanical properties, wear resistance, and corrosion resistance. However, in view of the poor thermal processing performance of copper alloys, the forming method of copper alloy bars is mainly casting. However, cast copper alloys ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/04C22C1/02C22C1/06B22D11/16
CPCB22D11/004B22D11/16C22C1/02C22C1/06C22C9/04
Inventor 曾力维巢国辉裘桂群胡明彬
Owner JINTIAN COPPER GROUP CORP NINGBO
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