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

Coating and method for improving flake graphite layer in flow channel of austenitic ductile iron casting

A technology of flake graphite and iron castings, which is applied in the direction of coating, casting mold, casting mold composition, etc., can solve the problems of insufficient suspension stability and adhesion of coatings, high probability of defective products, etc., and achieve excellent thixotropy and Fluidity, prevention of casting surface defects, and quality improvement effects

Active Publication Date: 2018-03-20
西峡飞龙特种铸造有限公司
View PDF9 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention can adapt to the complex structure of castings to eliminate flake graphite, but the suspension stability and cohesiveness of the coating are slightly insufficient, and the probability of defective products is slightly higher in the actual production process

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

Embodiment 1

[0025] This embodiment provides a coating for improving the flaky graphite layer of the inner flow channel of austenitic ductile iron castings. The components and weight percentages of each component are as follows: zircon powder: 51%; sodium bentonite 3.5%; preservative 2 %; defoamer 1%; sodium alginate 0.5%; α-starch 1%; water glass binder 1%; the rest is water.

[0026] Described preservative adopts Nordes C15 bactericidal preservative.

[0027] The defoamer is a water-based adhesive defoamer.

[0028] The particle size of the sodium bentonite is 350 mesh.

[0029] The method for improving the flaky graphite layer of the inner runner of the austenitic ductile iron casting comprises the following steps:

[0030] 1) Configure the paint according to the paint composition and the weight percentage of each composition, and stir evenly;

[0031] 2) Slowly dip the prepared resin sand core into the prepared coating solution, take it out after completely dipping, and shake it gen...

Embodiment 2

[0039] This embodiment provides a coating for improving the flaky graphite layer of the inner flow channel of austenitic ductile iron castings. Its components and weight percentages of each component are as follows: zircon powder: 52%; sodium bentonite 3.8%; preservative 2.3% %; defoamer 1.2%; sodium alginate 0.8%; α-starch 1.2%; water glass binder 1.2%; the rest is water.

[0040] Described preservative adopts Nordes C15 bactericidal preservative.

[0041] The defoamer is a water-based adhesive defoamer.

[0042] The particle size of the sodium bentonite is 350 mesh.

[0043] The method for improving the flaky graphite layer of the inner runner of the austenitic ductile iron casting comprises the following steps:

[0044] 1) Configure the paint according to the paint composition and the weight percentage of each composition, and stir evenly;

[0045] 2) Slowly dip the prepared resin sand core into the prepared coating solution, take it out after completely dipping, and sha...

Embodiment 3

[0053] This embodiment provides a coating for improving the flaky graphite layer of the inner flow channel of austenitic ductile iron castings. Its components and weight percentages of each component are as follows: zircon powder: 53%; sodium bentonite 3.8%; preservative 2.5% %; defoamer 1.2%; sodium alginate 0.8%; α-starch 1.2%; water glass binder 1.2%; the rest is water.

[0054] Described preservative adopts Nordes C15 bactericidal preservative.

[0055] The defoamer is a water-based adhesive defoamer.

[0056] The particle size of the sodium bentonite is 350 mesh.

[0057] The method for improving the flaky graphite layer of the inner runner of the austenitic ductile iron casting comprises the following steps:

[0058] 1) Configure the paint according to the paint composition and the weight percentage of each composition, and stir evenly;

[0059] 2) Slowly dip the prepared resin sand core into the prepared coating solution, take it out after completely dipping, and sha...

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
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a coating for improving the flaky graphite layer of the inner flow channel of an austenitic ductile iron casting. The components and weight percentages of the components are as follows: zircon powder: 50-60%; sodium bentonite 3-5%; Preservative 2‑3%; defoamer 1‑2%; sodium alginate 0.5‑2%; α‑starch 1‑2%; water glass binder 1‑2%; water 30‑40%. Also provided is a method for improving the flaky graphite layer of the inner flow channel of the austenitic ductile iron casting. The sand core is soaked in the paint, taken out, dried and then poured. The invention can prevent the reducing gas in the volatilization part of the resin from oxidizing the spheroidizing elements in the iron water, ensure the effective spheroidization of the molten iron, have shielding, absorption or replacement effects on sulfur, prevent sulfur from diffusing into the molten iron, and prevent flakes on the surface of castings Graphite, greatly improves the surface quality of austenitic ductile iron castings.

Description

technical field [0001] The invention relates to the technical field of casting auxiliary materials, in particular to a coating and a method for improving the flaky graphite layer of an inner flow channel of an austenitic ductile iron casting. Background technique [0002] In the production process of austenitic ductile iron, the spheroidization level of the inner cavity surface and the middle section area of ​​the casting is relatively large, the middle section is 2-3, and the inner cavity surface is 5-6, which makes the product scrapped and brings great harm to the enterprise. cause greater losses. Through the metallographic analysis of castings, it is found that flake graphite generally appears on the upper and lower surfaces of castings. Not only flake graphite appears in the surface layer, but also there is a very thin transition zone between flake graphite and spherical graphite. It is worm-like graphite, and the depth of the sheet is generally 1-2mm. This kind of fla...

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
Patent Type & Authority Patents(China)
IPC IPC(8): B22C3/00
Inventor 刘松奇闫国福孙稳定齐小军
Owner 西峡飞龙特种铸造有限公司