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Shaping method of fine diameter cast iron profile material

A technology of small diameter and forming method, applied in welding/cutting medium/material, welding medium, manufacturing tool, etc., can solve the problem of not being able to meet the production needs of small diameter cast iron welding core, and achieve low production cost and strong filling ability. , the effect of eliminating pores

Inactive Publication Date: 2006-01-11
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem that the existing casting technology cannot meet the production needs of thin-diameter cast iron welding cores (wires), the purpose of the present invention is to provide a forming method for thin-diameter cast iron profiles, which can obtain cast iron profiles with a diameter of Φ3mm to Φ10mm

Method used

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  • Shaping method of fine diameter cast iron profile material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Oil sand is used to make a mold in which the sprue 2 and the cavity 10 are integrated. After the oil sand mold is dried and hardened, the mold is placed in the vacuum box 1, the sealing cover is sealed, and the sprue basin 5 and the upper cover are tightly sealed, and the top of the sprue 2 is sealed with the sealing mud strip 8 and the plug with the sealing plug 7, and the vacuum pump is turned on through the pumping hole 9, and when the vacuum in the vacuum box 1 reaches 60kPa, the ball The molten iron 6 is poured into the sprue basin 5, and the molten iron 6 of ductile iron enters the cavity 10 through the sprue 2, and is filled, cooled and solidified under the action of vacuum negative pressure to form a ductile iron profile of Φ3mm.

Embodiment 2

[0021] Adopt self-hardening sand to make the casting mold in which the sprue 2 and the cavity 10 are integrated, and the others are the same as in the embodiment 1. When the vacuum in the vacuum box 1 reaches 55kPa, the gray iron molten iron 6 is poured into the sprue basin In step 5, the mold is filled, cooled and solidified under the action of vacuum negative pressure to form a Φ4mm gray cast iron profile.

Embodiment 3

[0023] Adopt self-hardening sand to make the casting mold in which the sprue 2 and the cavity 10 are integrated, and the others are the same as in embodiment 1. When the vacuum in the vacuum box 1 reaches 50kPa, pour the alloy cast iron molten iron 6 into the sprue basin In step 5, the mold is filled, cooled and solidified under the action of vacuum negative pressure to form a Φ10mm alloy cast iron profile.

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Abstract

A method for preparing fine-diameter cast iron section includes such steps as putting a casting mould in a vacuum system, vacuumizing, filling molten iron in the cavity of mould via sprue cup under the action of vacuum, and solidifying in vacuum state. Its advantages are high rate of finished products and precision, and high quality.

Description

technical field [0001] The invention belongs to the technical field of casting, and relates to a forming method of a cast iron profile, in particular to a forming method of a thin-diameter cast iron profile. Background technique [0002] As special welding materials, cast iron electrodes and wires are indispensable in engineering fields such as welding of cast iron materials and defect repair of cast iron parts. Since cast iron is a brittle material, the welding core (wire) cannot be produced by drawing, rolling or extrusion like steel and non-ferrous metals, but can only be produced by liquid forming, that is, casting. In the prior art, methods for cast iron core (wire) casting include precision casting, common sand casting and metal mold casting. Precision casting is easy to ensure the forming quality of the welding core (wire), but its cost is too high, and it is rarely used as a welding core (wire) forming method; although the casting cost of sand casting is low, the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D18/06B22D25/02B23K35/40
Inventor 徐锦锋翟秋亚
Owner XIAN UNIV OF TECH
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