Precise CRDM part casting forming method

A technology of precision casting and molding method, applied in casting molding equipment, molds, mold components, etc., can solve problems such as restricting the development of nuclear power industry, large consumption, threatening national defense security, etc., and achieve considerable economic and social benefits, parts The effect of high yield and meeting technical requirements
CN104874739AActive Publication Date: 2015-09-02DONGFANG TURBINE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DONGFANG TURBINE CO LTD
Publication Date
2015-09-02

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Abstract

The invention discloses a precise CRDM part casting forming method. The precise CRDM part casting forming method comprises the steps that 1, a ceramic mold shell matched with design shape is manufactured in an investment mode according to the design shape of a CRDM claw and / or a connecting rod; 2, the ceramic mold shell is preheated under the condition of the temperature ranging from 850 DEG C to 1100 DEG C, the temperature is kept for 1-5 hours, and temperature uniformity of all positions of the ceramic mold shell is ensured; a stellite ingot is molten under the condition of the temperature ranging from 1400 DEG C to 1500 DEG C and is cast into the well-preheated ceramic mold shell, and a casting is formed after solidification; 3, mold shell is cleaned, and the casting is subjected to heat preservation under the condition of the temperature ranging from 850 DEG C to 950 DEG C and then is subjected to air cooling for 610 hours. The forming of the connecting rod and / or the claw part for a CRDM is reliably achieved by means of an investment casting technology, forming operation is easy, finished product rate is high, and a formed connecting rod and / or the claw part has even texture, is long-acting and abrasion-resistant, is reliable and stable in use and can effectively meet the technological requirements.
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Description

Technical field

[0001] The invention involves precision casting technology, which is specifically a method of precision casting of CRDM parts. Background technique

[0002] CRDM is the abbreviation of the nuclear control rod driver. It is a servo institution of the nuclear power plant reactor control system and the security protection system. It has the effect of completing the reactor startup, regulating reactor power, stopping reactor and accidental stopping.Key equipment for the safe and reliable operation of nuclear reactors.

[0003] For a long time, the molding technology of the nuclear control stick drive mechanism has been monopolized by the world's strong powers and strong enterprises, which includes the connecting rod and claw molding technology in the coil group of the nuclear control stick drive mechanism.This technical monopoly forces my country to import a high price (the current price is about 20,000 yuan / set) import. The connecting rods and claws of the nuclear co...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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