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Copper-steel bimetal casting improved technology

A bimetallic and copper-steel technology, applied in the field of metal casting, can solve problems such as the inability to realize copper-steel bimetallic metallurgical bonding, component specific gravity segregation, etc., achieve the goal of reducing diffusion energy barrier, reducing alloy composition segregation, and improving casting quality Effect

Inactive Publication Date: 2015-01-07
GUIZHOU ANJI AVIATION PRECISION CASTING
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Problems solved by technology

The centrifugal casting copper-steel bimetal process has the following disadvantages: 1) It is only suitable for rotating bodies, and has limitations in the production of special-shaped castings; 2) It is easy to cause component specific gravity segregation when casting copper alloys; 3) Ordinary centrifugal casting The process cannot realize the metallurgical combination of copper-steel bimetal

Method used

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  • Copper-steel bimetal casting improved technology

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Embodiment Construction

[0026] Taking Q255 carbon steel and ZCuSn3Zn11Pb4 tin bronze as examples below, the technical solution of the present invention will be described in detail.

[0027] Q255 carbon steel is often used in the manufacture of parts that do not require high strength, such as bolts, keys, rockers, shafts, tie rods and various steel structures, steel plates, etc., and its solid-liquid phase transition temperature is around 1450 °C. ZCuSn3Zn11Pb4 tin bronze is a commonly used cast copper alloy with excellent mechanical properties, good wear reduction and corrosion resistance, easy to cut, good welding performance, and small casting shrinkage coefficient. It is often used to make elastic elements and wear-resistant Components.

[0028] First, the Q255 carbon steel bar of the corresponding size is processed into a shaft sleeve with a height of 50mm, an outer diameter of 50mm and a wall thickness of 4mm by machining. Design and make the corresponding mold for use and then refer to the att...

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Abstract

The invention provides a copper-steel bimetal casting improved technology. Copper or copper alloy in a certain thickness is directly cast on a steel base body through a static cast type casting method, and the main technical process comprises the steps of: cleaning a steel billet, heating the steel billet and spraying a borax solution on the heated steel billet, combining the cast, heating and keeping the heat, melting and pouring the copper or copper alloy, performing ultrasonic vibration on the steel billet, and keeping the high temperature of the cast. Through the copper-steel bimetal casting improved technology provided by the invention, the ultrasonic vibration and stirring step is added on the basis of the static embedding process technology, a copper or copper alloy layer in a certain thickness and without segregation can be obtained by casting on steel billets in various types and various sizes, and good metallurgical bonding can be realized between the copper or copper alloy layer of the obtained cast and the steel billet.

Description

technical field [0001] The invention relates to the application technology of metal casting, in particular to the improvement technology of copper-steel bimetallic casting. Background technique [0002] Bimetallic casting techniques are generally used for two metallic materials with similar compositions. For example, after melting steels of two different materials, they are respectively injected into the cavity in a liquid state to obtain a casting with a dense joint surface; or low carbon steel is cast on the surface of a high chromium steel casting. Two metal materials with similar components are easy to fuse with each other, and a metallurgical bond with excellent performance can be obtained in casting. [0003] The cost of steel is low, the processing technology is mature, the mechanical strength is high, and the copper alloy has good wear resistance. The bearings, bushings and other components made of copper alloy and steel have been widely used in some special working...

Claims

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Application Information

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IPC IPC(8): B22D19/16B22D27/08B22D27/04
CPCB22D19/16B22D27/04B22D27/08
Inventor 勾忠毅张艳波陈永发
Owner GUIZHOU ANJI AVIATION PRECISION CASTING
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