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Casting technology of wear-resistant and low-porosity steel casting

A casting process and technology of steel castings, applied in the direction of manufacturing tools, casting molding equipment, casting molds, etc., can solve the problems of steel castings that are prone to cracks, increase production costs, and cannot adapt to enterprises, so as to achieve easy sand falling and reduce The effect of low cost and strong sand inclusion resistance

Inactive Publication Date: 2015-02-04
DAFENG HONGLIAN CAST STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional casting design and production methods can no longer meet the requirements of the market for enterprises. Foundry enterprises must change the traditional production methods and introduce new technologies and methods
At present, in the steel casting industry, when casting steel castings, it is usually necessary to manufacture molds, cast and then carry out post-processing of castings. The process is relatively cumbersome. Product quality has caused great difficulties for subsequent processing and increased production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment provides a casting process for wear-resistant and low-porosity steel castings, which specifically includes the following steps:

[0029] (1) Silica sand, bentonite, additives and water are used as molding materials to make molds;

[0030] When mixing, the molding material is selected according to the mass percentage of silica sand: 89%, bentonite: 7.5%, additive: 0.5 and water: 3.0%. The silica sand is mixed with 50 / 100-70 / 140 mesh silica sand, and the particle size of the silica sand is 3 sieves, and the silica content in the silica sand is ≥94%, the mud content is less than 1%, and the water content is less than 1%.

[0031] Bentonite is a mixture of sodium-based bentonite and calcium-based bentonite, sodium-based bentonite: calcium-based bentonite = 1:1.5, and the additive is α-starch and dextrin mixed in a weight ratio of 4:1;

[0032] (2) Dry the mold made in step (1) with hot air at 130°C for 0.8 hours;

[0033] (3) Add barium-based and lanthanum...

Embodiment 2

[0040] This embodiment provides a casting process for wear-resistant and low-porosity steel castings, which specifically includes the following steps:

[0041] (1) Silica sand, bentonite, additives and water are used as molding materials to make molds;

[0042] When mixing, the molding material is selected according to the mass percentage of silica sand: 89%, bentonite: 7.5%, additive: 0.5 and water: 3.0%. The silica sand is mixed with 50 / 100-70 / 140 mesh silica sand, and the particle size of the silica sand is 4 sieves, and the silica content in the silica sand is ≥94%, the mud content is less than 1%, and the moisture content is less than 1%.

[0043] Bentonite is a mixture of sodium-based bentonite and calcium-based bentonite, sodium-based bentonite: calcium-based bentonite = 1:1.5, and the additive is α-starch and dextrin mixed in a weight ratio of 4:1;

[0044] (2) Dry the mold made in step (1) with hot air at 140°C for 1 hour;

[0045](3) Add barium-based and lanthanum-...

Embodiment 3

[0052] This embodiment provides a casting process for wear-resistant and low-porosity steel castings, which specifically includes the following steps:

[0053] (1) Silica sand, bentonite, additives and water are used as molding materials to make molds;

[0054] When mixing, the molding material is selected according to the mass percentage of silica sand: 89%, bentonite: 7.5%, additive: 0.5 and water: 3.0%. The silica sand is mixed with 50 / 100-70 / 140 mesh silica sand, and the particle size of the silica sand is 3 sieves, and the silica content in the silica sand is ≥94%, the mud content is less than 1%, and the water content is less than 1%.

[0055] Bentonite is a mixture of sodium-based bentonite and calcium-based bentonite, sodium-based bentonite: calcium-based bentonite = 1:1.5, and the additive is α-starch and dextrin mixed in a weight ratio of 4:1;

[0056] (2) Dry the mold made in step (1) with hot air at 135°C for 0.5h;

[0057] (3) Add barium-based and lanthanum-assi...

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Abstract

The invention discloses a casting technology of a wear-resistant and low-porosity steel casting. The casting technology takes silica sand, bentonite, an additive and water as molding materials, and comprises the steps of preparing a casting mould by mixing the molding materials; drying the prepared casting mould with hot air at the temperature of 130-140 DEG C; injecting the dissolved metallic solution into the casting mould, and pouring a semi-finished product; carrying out heat treatment on the semi-finished product, polishing and machining to obtain the finished product; checking and putting into a storage. After the casting technology is adopted, the wear resistance and the toughness of the casting are greatly improved, the pores in the casting are reduced, and the service life of the casting is prolonged; furthermore, the casting technology is simple in operation and low in cost.

Description

technical field [0001] The invention relates to a casting process for steel castings, in particular to a casting process for wear-resistant and low-porosity steel castings, and belongs to the field of casting processes. Background technique [0002] Casting is an important production method of mechanical product blanks and occupies an important position in the national economy. With the formation of a unified world market and the development of market economy, foundry enterprises are facing increasingly fierce competition and severe challenges. The traditional casting design and production methods can no longer meet the requirements of the market for enterprises. Foundry enterprises must change the traditional production methods and introduce new technologies and methods. At present, in the steel casting industry, when casting steel castings, it is usually necessary to manufacture molds, cast and then carry out post-processing of castings. The process is relatively cumberso...

Claims

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Application Information

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IPC IPC(8): B22C9/02B22C1/00C21D1/26C21D1/18
CPCB22C9/02B22C1/02C21D1/18C21D1/26
Inventor 吴卫明吴正平
Owner DAFENG HONGLIAN CAST STEEL
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