Unlock instant, AI-driven research and patent intelligence for your innovation.

Refining and purifying agent for spheroidal graphite cast iron and preparation method thereof

A technology of ductile iron and purifying agent, applied in the field of casting, can solve the problems of pitting corrosion, white spot, fly feet, etc., and achieve the effects of reducing slag inclusions, improving fluidity, and good thermodynamic conditions

Inactive Publication Date: 2018-12-21
ANHUI POLYTECHNIC UNIV MECHANICAL & ELECTRICAL COLLEGE
View PDF1 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current production process will lead to casting defects such as slag inclusions, pores, and micro-cracks. Therefore, we have developed a new type of refining nodulizer, which avoids the above defects and also solves pitting corrosion, which often occurs in the processing of ductile iron. Vitiligo, fly feet and other problems

Method used

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
View more

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0019] The present invention also provides a preparation method of the aforementioned refining and purifying agent, the preparation method comprising: (1) taking corresponding raw materials according to the chemical composition and proportion of the aforementioned refining and purifying agent for deployment; (2) According to the proportion of the refining agent, after weighing the required raw materials of each component, put them into an oven for drying respectively, control the temperature at 120-140°C, and bake for 60-90 minutes; (3) bake the above raw materials After the roasting is completed, put it in a dry space to cool to room temperature, mix the raw materials, and stir them with a pulverizer to make the ingredients evenly mixed; (4) Sampling the mixed refining agent for uniformity, packaging it after passing the test, and storing it in a dry place for later use .

[0020] In order to improve the purification effect, reduce the occurrence of slag inclusions, pores, an...

preparation example 1

[0032] The preparation method of refining purifying agent, described preparation method comprises:

[0033] (1) According to the chemical composition and proportion of the refining purifying agent, the corresponding raw materials are used for deployment;

[0034] Wherein, the ratio is: in parts by mass, the refining purifier includes: 55 parts of CaO, 20 parts of Al 2 o 3 , 4 parts MgO, 4 parts CaF, 6 parts SiO 2 , 3 copies of RE;

[0035] (2) According to the proportion of the refining agent, after weighing the required raw materials of each component, put them into an oven for drying respectively, the temperature is controlled at 120°C, and the baking time is 60 minutes;

[0036] (3) After the above-mentioned raw materials are baked, put them in a dry space to cool to room temperature, mix the raw materials, and stir them with a pulverizer to make the ingredients evenly mixed;

[0037] (4) Sampling and testing the homogeneity of the mixed refining agent, packing it after...

preparation example 2

[0039] The preparation method of refining purifying agent, described preparation method comprises:

[0040] (1) According to the chemical composition and proportion of the refining purifying agent, the corresponding raw materials are used for deployment;

[0041] Wherein, the proportion is: in parts by mass, the refining purifying agent includes: 35 parts of CaO, 30 parts of Al 2 o 3 , 6 parts MgO, 6 parts CaF, 10 parts SiO 2 , 5 REs;

[0042] (2) According to the proportion of the refining agent, after weighing the required raw materials of each component, put them into an oven for drying respectively, the temperature is controlled at 140°C, and the baking time is 90 minutes;

[0043] (3) After the above-mentioned raw materials are baked, put them in a dry space to cool to room temperature, mix the raw materials, and stir them with a pulverizer to make the ingredients evenly mixed;

[0044] (4) Sampling and testing the homogeneity of the mixed refining agent, packing it a...

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
Login to View More

PUM

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Tensile strengthaaaaaaaaaa
Tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a refining and purifying agent for spheroidal graphite cast iron and a preparation method thereof. The refining and purifying agent comprises, by mass, 35-55% of CaO and 4-6% of MgO. By using the refining and purifying agent, the phenomena of slag inclusion, gas holes and micro-crack defects of the spheroidal graphite cast iron are reduced, moreover, the problems of pitting, white spots, porosity and the like frequently occurring in the machining of the spheroidal graphite cast iron in the prior art are solved, and in addition, the obtained spheroidal graphite cast ironhas the characteristics of high strength, high pearlite content and high hardness.

Description

technical field [0001] The invention relates to the field of casting, in particular to a refining purifying agent for ductile iron and a preparation method thereof. Background technique [0002] Ductile iron is widely used, and its output is second only to gray cast iron. At present, the production process of ductile iron is to add a certain amount of nodularizer and inoculant to molten iron with a certain composition, and make the graphite become spherical. The matrix structure of ductile iron is related to many factors, in addition to the influence of chemical composition, it is also related to the treatment of molten iron, the solidification conditions of molten iron and heat treatment. However, the current production process will lead to casting defects such as slag inclusions, pores, and micro-cracks. Therefore, we have developed a new type of refining nodulizer, which avoids the above defects and also solves pitting corrosion, which often occurs in the processing of d...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C21C1/10C21C7/04
Inventor 柴知章王雯雯贾瑞方健张孝宇
Owner ANHUI POLYTECHNIC UNIV MECHANICAL & ELECTRICAL COLLEGE