Investment casting technology for copper alloy casting

A technology of investment casting and copper alloy, which is applied in the field of investment casting technology of copper alloy castings, can solve problems such as complex process, and achieve the effects of good toughness, good thermal shock resistance and good thermal conductivity

Active Publication Date: 2015-11-18
NINGBO TIANYE PRECISION CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the complexity of the investment casting process, there are many factors that affect the dimensional accuracy of the casting, such as the shrinkage of the mold material, the deformation of the investment mold, the change of the wire

Method used

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  • Investment casting technology for copper alloy casting
  • Investment casting technology for copper alloy casting
  • Investment casting technology for copper alloy casting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Step 1, mold development, the present invention adopts VMCL600 vertical machining center bed type CNC milling machine to set molds, such as some precision parts of auto parts castings.

[0058] Step 2, mold making, using the mold to inject wax to prepare a wax model of the product, which is the investment molding process. First configure the mold material, the weight of the mold material is as follows:

[0059]

[0060] When configuring the above substances, an electric hot water bath melting device is used, and the specific operation steps are as follows:

[0061] S1: Weigh the above-mentioned substances in proportion, put the above-mentioned substances into a clean water-bath stainless steel or aluminum crucible, and melt with electricity;

[0062] S2: After the mold material is melted, stir evenly, and the maximum temperature of the mold material should be controlled at 95°C;

[0063] S3: filter the molten molding material with a 120-mesh sieve to remove impurit...

Embodiment 2

[0086] Step 1, mold development, the present invention adopts VMCL600 vertical machining center bed type CNC milling machine to set molds, such as some precision parts of auto parts castings.

[0087] Step 2, mold making, using the mold to inject wax to prepare a wax model of the product, which is the investment molding process. First configure the mold material, the weight of the mold material is as follows:

[0088]

[0089] When configuring the above substances, an electric hot water bath melting device is used, and the specific operation steps are as follows:

[0090] S1: Weigh the above-mentioned substances in proportion, put the above-mentioned substances into a clean water-bath stainless steel or aluminum crucible, and melt with electricity;

[0091] S2: After the mold material is melted, stir evenly, and the maximum temperature of the mold material should be controlled at 95°C;

[0092] S3: filter the molten molding material with a 120-mesh sieve to remove impurit...

Embodiment 3

[0115] Step 1, mold development, the present invention adopts VMCL600 vertical machining center bed type CNC milling machine to set molds, such as some precision parts of auto parts castings.

[0116] Step 2, mold making, using the mold to inject wax to prepare a wax model of the product, which is the investment molding process. First configure the mold material, the weight of the mold material is as follows:

[0117]

[0118] When configuring the above substances, an electric hot water bath melting device is used, and the specific operation steps are as follows:

[0119] S1: Weigh the above-mentioned substances in proportion, put the above-mentioned substances into a clean water-bath stainless steel or aluminum crucible, and melt with electricity;

[0120] S2: After the mold material is melted, stir evenly, and the maximum temperature of the mold material should be controlled at 100°C;

[0121] S3: filter the molten mold material with a 100-mesh sieve to remove impuritie...

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PUM

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Abstract

The invention provides an investment casting technology for a copper alloy casting. Chlorcosane, Fischer-tropsch wax, stearic acid, glycerol ester of rosin, microcrystalline wax, polypropylene wax, polyisobutene, polyurethane elastomers and aldehyde resin serve as mold materials; and the polyisobutene, the polyurethane elastomers and the aldehyde resin are inserted into the chlorcosane, the Fischer-tropsch wax, the microcrystalline wax, the polypropylene wax and the stearic acid in a penetrating manner, and a formed structure has the good strength and the good heat stability. As for coatings adopted in the investment casting technology, cristobalite has the complete chemical inertness, and splitting decomposition can not occur at a quite high temperature; fused alumina has the beneficial effects of being high in melting point, compact in structure, good in heat conductivity and the like, the thermal expansion coefficient is small, and thermal expansion is even; and boron nitride is quiet low in friction coefficient, quite good in high-temperature stability and heat shock resistance, quite high in strength and heat conduction coefficient and lower in expansion coefficient. In this way, the copper alloy casting obtained with the investment casting technology for the copper alloy casting is high in strength and good in tenacity, no crack is generated on the surface, and the product quality is reliable.

Description

technical field [0001] The invention relates to the field of casting technology, in particular to an investment casting process for copper alloy castings. Background technique [0002] Investment casting, also known as "lost wax casting", is an ancient casting method. The earliest investment casting found in my country was in the early Warring States period more than 2,400 years ago. Since the 1950s, investment casting has been gradually used in industrial production. After decades of development, investment casting has become a basic process in my country's machinery manufacturing industry and has formed a unique industry. Investment casting is widely used in manufacturing industries such as aviation, automobiles, machine tools, ships, internal combustion engines, gas turbines, telecommunication instruments, weapons, medical equipment and knives, and is also used in the manufacture of arts and crafts. [0003] The so-called investment casting process, simply put, is to use...

Claims

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Application Information

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IPC IPC(8): B22C9/04B22C3/00
Inventor 崔建业
Owner NINGBO TIANYE PRECISION CASTING
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