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Vermicular graphite cast iron glass mold material and mold preparation method

A technology of vermicular graphite cast iron and glass molds, which is applied in the field of vermicular graphite cast iron glass mold materials and mold preparation, can solve the problems of casting stress of large materials, white holes, shrinkage cavities of rough castings, etc., to reduce the amount of matrix, reduce casting stress, The effect of increasing the degree of graphitization

Active Publication Date: 2020-06-02
SUZHOU DONGHAI GLASS MOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Second, due to the special requirements for the use of the glass mold itself, the contact surface between the inner cavity and the molten glass must be dense. Therefore, it is necessary to use a forming cold iron to chill the inner cavity of the mold, and cooperate with the aforementioned large amount of alloying elements. Therefore, a huge Material internal casting stress and white mouth
At the same time, due to the pasty solidification method of vermicular graphite cast iron, sometimes the ingate may even solidify before the casting, resulting in an isolated liquid phase area and shrinkage cavities inside the rough casting

Method used

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  • Vermicular graphite cast iron glass mold material and mold preparation method

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Effect test

Embodiment 1

[0037] The material of the vermicular graphite cast iron glass mold is composed of the following chemical elements: carbon 3.9%, silicon 1.5%, manganese 0.15%, phosphorus<0.1%, sulfur<0.03%, magnesium<0.05%, the rest is iron, and other unavoidable The impurity element; The preparation method of described vermicular graphite cast iron glass mold comprises the following steps:

[0038] A. Melting: According to the above chemical composition, add steel scrap and Q10 pig iron to the smelting furnace quantitatively, add the returned material after the scrap steel and pig iron are melted, and control the weight percentage of the returned material in the added pig iron to 30%, and the temperature of the molten iron When it reaches 1450°C, use a silicon carbon meter for process control, mainly to control the silicon content. If the silicon content is within the range, there is no need to adjust it. If it is higher than the upper limit, then add steel scrap for adjustment. Adjustment, ...

Embodiment 2

[0042] The material of the vermicular graphite cast iron glass mold is composed of the following chemical elements: carbon 4.0%, silicon 1.6%, manganese 0.2%, phosphorus<0.1%, sulfur<0.03%, magnesium<0.05%, the rest is iron, and other unavoidable The impurity element; The preparation method of described vermicular graphite cast iron glass mold comprises the following steps:

[0043] A. Melting: According to the above chemical composition, add steel scrap and Q10 pig iron to the smelting furnace quantitatively, add the returned material after the scrap steel and pig iron are melted, and control the weight percentage of the returned material in the added pig iron to 30%, and the temperature of the molten iron When it reaches 1500°C, use a silicon carbon meter for process control, mainly to control the silicon content. If the silicon content is within the range, there is no need to adjust it. If it is higher than the upper limit, add steel scrap for adjustment. If it is lower than...

Embodiment 3

[0047] The material of the vermicular graphite cast iron glass mold is composed of the following chemical elements: carbon 3.8%, silicon 1.4%, manganese 0.1%, phosphorus<0.1%, sulfur<0.03%, magnesium<0.05%, the rest is iron, and other unavoidable The impurity element; The preparation method of described vermicular graphite cast iron glass mold comprises the following steps:

[0048] A. Melting: According to the above chemical composition, add steel scrap and Q10 pig iron to the smelting furnace quantitatively, add the returned material after the scrap steel and pig iron are melted, and control the weight percentage of the returned material in the added pig iron to 30%, and the temperature of the molten iron When it reaches 1450°C, use a silicon carbon meter for process control, mainly to control the silicon content. If the silicon content is within the range, there is no need to adjust it. If it is higher than the upper limit, then add steel scrap for adjustment. Adjustment, a...

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Abstract

The invention discloses a vermicular graphite cast iron glass mold material and a mold preparation method. The vermicular graphite cast iron glass mold material is prepared from the following chemicalelements including3.8%-4.0% of carbon, 1.2%-1.8 % of silicon, 0.1%-0.2% of manganese, less than 0.1% of phosphorus, less than 0.03% of sulfur, less than 0.05% of magnesium, and the balance iron and other unavoidable impurity elements. According to the vermicular graphite cast iron glass mold material and the mold preparation method, the formula of vermicular graphite cast iron is optimized, the degree of graphitization of a vermicular graphite cast iron glass mold blank in the as-cast state is increased, the amount of a pearlite matrix is reduced, and the casting stress is reduced. Besides conventional alloys like ferrosilicon, there is no other alloying element added. The manganese element is self-contained in Q10 pig iron instead of being artificially added, so that the cost of the casting material is greatly reduced. More importantly, due to the small quantity of alloying elements, unpacking is carried out after the casting is naturally cooled to 250 DEG C in a casting system, theamount of pearlite in the as-cast state does not exceed 15%, and it is not necessary to perform high-temperature graphitization annealing at 930 DEG C or above.

Description

technical field [0001] The invention relates to the field of glass molds, in particular to a material for vermicular graphite cast iron glass molds and a mold preparation method. Background technique [0002] The glass mold is the main equipment for the production of glass products. It is frequently in contact with molten glass liquid at a temperature of about 1100°C. The medium plays a vital role. The surface of the inner cavity of the glass mold is required to have good high temperature resistance, wear resistance, oxidation resistance and corrosion resistance to prolong the service life. At present, the materials of glass molds mainly include cast iron, copper alloy, stainless steel, nickel-based alloy and other materials. Among them, cast iron will still occupy an absolute dominant position in the glass mold industry in the foreseeable future because of its low price, good casting and machining performance. [0003] Cast iron glass mold materials can be divided into t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C37/10C22C33/08
CPCC22C33/08C22C37/10
Inventor 唐剑锋
Owner SUZHOU DONGHAI GLASS MOLD
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