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Inoculant for as-cast production of pearlite ductile iron and preparation process thereof

A pearlite sphere and a preparation process technology, applied in the field of casting, can solve the problems of wasting antimony metal and polluting the environment, and achieve the effects of environmental protection, simple method and strong inoculation effect

Inactive Publication Date: 2018-04-20
南京浦江合金材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Not only wasting the precious and scarce metal antimony, but also polluting the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This example provides an inoculant for producing pearlite ductile iron in the as-cast state, wherein the mass percentage ratio of various components is: Sb: 0.1%, Si: 65%, Al: 0.1%, Ca: 0.1% , the balance being Fe, the preparation process of the inoculant comprises the following steps;

[0032] Step 1. Ingredients:

[0033] ① The amount of charge loaded into the medium frequency induction melting electric furnace is 500kg;

[0034] ② Calibrate and calibrate with standard weights before batching, and then weigh;

[0035] ③ According to the content ratio of various elements in the inoculant to be prepared, calculate the corresponding amount of raw materials used, make a list of ingredients, and then accurately weigh various raw materials according to the list of ingredients and wait for use;

[0036] ④ Roll the metal antimony plate into a metal antimony square with a rolling mill and wait for use;

[0037] Step 2. Adding ingredients:

[0038] First add 60 kg of low-al...

Embodiment 2

[0049] This example provides an inoculant for the production of pearlite ductile iron in the as-cast state. The mass percentage ratio of the various components of the silicon-antimony inoculant is: Sb: 15%, Si: 75%, Al: 0.3%, Ca : 0.2%, the balance is Fe, and the preparation technology of this inoculant comprises the following steps;

[0050] Step 1. Ingredients:

[0051] ① The amount of charge loaded into the medium frequency induction melting electric furnace is 600kg;

[0052] ② Calibrate and calibrate with standard weights before batching, and then weigh;

[0053] ③ According to the content ratio of various elements in the inoculant to be prepared, calculate the corresponding amount of raw materials used, make a list of ingredients, and then accurately weigh various raw materials according to the list of ingredients and wait for use;

[0054] ④ Roll the metal antimony plate into a metal antimony square with a rolling mill and wait for use;

[0055] Step 2. Adding ingred...

Embodiment 3

[0067] This example provides an inoculant for producing pearlite ductile iron in the as-cast state, wherein the mass percentage ratio of various components is: Sb: 7.5%, Si: 70%, Al: 0.5%, Ca: 0.3% , the balance being Fe, the preparation process of the inoculant comprises the following steps;

[0068] Step 1. Ingredients:

[0069] ① The amount of charge loaded into the medium frequency induction melting electric furnace is 550kg;

[0070] ② Calibrate and calibrate with standard weights before batching, and then weigh;

[0071] ③ According to the content ratio of various elements in the inoculant to be prepared, calculate the corresponding amount of raw materials used, make a list of ingredients, and then accurately weigh various raw materials according to the list of ingredients and wait for use;

[0072] ④ Roll the metal antimony plate into a metal antimony square with a rolling mill and wait for use;

[0073] Step 2. Adding ingredients:

[0074] First add 68 kg of low-al...

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Abstract

The invention discloses an inoculant for as-cast production of pearlite ductile iron and a preparation process thereof. According to the preparation process, a medium-frequency electric induction furnace is used, an outside-furnace mix-melting method is adopted, and by controlling the adding time, adding mode and melting temperature of metal antimony, the silicon-antimony inoculant with the antimony content range being 0.1%-15% can be prepared. The method is simple, operation is convenient and rapid, the cost is low, the antimony metal yield can be increased by a large margin, energy consumption is reduced, protection of the environment is achieved, the working efficiency is improved, and the benefits are increased.

Description

technical field [0001] The invention belongs to the field of casting, and relates to a preparation process of an inoculant, in particular to a silicon antimony inoculant for producing pearlite ductile iron in an as-cast state and a preparation process thereof. Background technique [0002] Pearlitic ductile iron refers to ductile iron in which pearlite accounts for more than 80% of the matrix structure. Commonly referred to as high-grade ductile iron such as QT600-2, QT700-2, and QT800-2 belong to this type. It is mainly used to manufacture parts that require high strength, certain fatigue strength and wear resistance, such as diesel engine crankshafts, connecting rods, etc. Cast pearlitic ductile iron has the advantages of high strength, high hardness, high wear resistance, low production cost and long service life, etc., and has been widely used to replace molybdenum-chromium alloy cast iron and steel castings in recent years. Automobile panel mold blank. Pearlitic duct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C1/10
CPCC21C1/10
Inventor 任启才田毅菲段清忠沈乐刘英陈刘剑赵战
Owner 南京浦江合金材料股份有限公司
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