Technological process for treating casting surface

A process method and casting technology, applied in the field of casting production and manufacturing, can solve the problems of molten iron scouring and falling, efficiency decline, failure, etc., and achieve the effects of stable coating performance, reduced leakage rate, and grain refinement.

Inactive Publication Date: 2013-09-11
WUHU YONGDA TECH
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Problems solved by technology

However, there are still some problems in the process of use, such as: 1. The cost of tellurium powder is high, and the production cost of castings in large quantities will increase and the benefit will decrease; 2. It is easy to be washed away by molten iron during

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  • Technological process for treating casting surface

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Embodiment Construction

[0014] In the following, referring to the drawings, through the description of the embodiments, the specific embodiments of the present invention such as the shape and structure of the various components involved, the mutual position and connection relationship between the various parts, the function and working principle of each part, etc. Detailed description:

[0015] As attached figure 1 As shown, the present invention is a process method for treating the surface of a casting. The casting is formed by a sand mold and a sand core fixed in the sand mold. The process method includes applying alcohol to the surface of the sand core. The process steps of tellurium-based powder coating, before the alcohol-based tellurium powder coating is applied on the surface of the sand core, industrial alcohol is added to the alcohol-based tellurium powder coating, and the alcohol-based tellurium powder coating and industrial alcohol are configured to a Baume degree of 29-31 The smear liquid, ...

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Abstract

The invention provides a technological process for treating a casing surface and belongs to the technical field of production and manufacture of casting parts. According to the technological process, industrial alcohol is added to an alcohol-based tellurium powder coating before painting the alcohol-based tellurium powder coating on a sand core surface; the alcohol-based tellurium powder coating and the industrial alcohol are prepared into a painting liquid with a baume degree of 29 to 31; the tellurium in the painting liquid accounts for 4 to 8% of the total weight of the painting liquid; while being painted on the sand core surface, the painting liquid is stirred at every 2 to 5 minutes. The technological process is improved in concentration ratio of the painting liquid, design of a casting sand mould, usage of an adhering preventing sand coating, casting temperature and setting of temperature holding time, so that a coating formed by painting the painting liquid is stable in performance and free of failure and falling off, a phenomenon that the adhering sand is sintered in an inner cavity of a casting water jacket is avoided, and the leakage rate is greatly decreased.

Description

Technical field [0001] The invention belongs to the technical field of casting production and manufacturing, and more specifically, relates to a process method for treating the surface of a casting. Background technique [0002] Tellurium is a rare material. It is a by-product obtained in the process of refining copper. It is a transition element between metal and non-metal. It has a slight metallic luster, does not have ductility, and is easily crushed. Adding it to the molten gray iron liquid can promote the cooling of the metal in a short time and accelerate the solidification rate, thereby hindering the graphitization and refining the grains to obtain dense castings. For a long time, casters have used tellurium to treat gray iron. Organization and performance are improved. Tellurium powder coating uses the metallurgical effect of tellurium and the principle of surface alloying to alloy the surface of the casting to form a white layer on the surface of the required casting to...

Claims

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Application Information

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IPC IPC(8): B22C3/00B22D27/18
Inventor 戈德存张伟光黄发榜白素云惠彦芳
Owner WUHU YONGDA TECH
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