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Sand-lined metal mold casting technology for high-manganese steel liner plate

A metal mold sand-coated, high-manganese steel lining technology, applied in metal processing equipment, manufacturing tools, casting molding equipment, etc., can solve the problems of high-manganese steel lining shrinkage, low density, coarse grains, etc. , to achieve the effect of grain refinement, shrinkage cavity defect reduction and service life improvement

Active Publication Date: 2013-06-19
NINGGUO DONGDU CASTING
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Problems solved by technology

[0003] The purpose of the present invention is to provide a metal mold sand-covered casting process for high manganese steel lining boards, using a new process to solve the internal shrinkage porosity and shrinkage cavities of the high manganese steel lining boards produced in the prior art, with coarse grains and low density the puzzle

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  • Sand-lined metal mold casting technology for high-manganese steel liner plate

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Embodiment Construction

[0025] A metal mold sand-covered casting process for a high manganese steel liner, comprising the following steps:

[0026] (1) Design and processing of metal molds

[0027] According to the shape of the casting, the shape of the inner and outer metal molds is designed, gray cast iron or nodular cast iron is used for molding, and the metal mold wall thickness is controlled at 15mm; the whole mold is composed of the upper box of the water glass sand mold and the lower box of the metal mold; the upper box There is a pouring riser, and there are ventilation holes on the sodium silicate sand mold. The spacing of the ventilation holes is 80mm, some of which lead to the cavity, and some of which do not lead to the cavity; the lower box is equipped with a riser area, and a riser seat is installed in the riser area , the riser seat is surrounded by water glass sand mold, the riser seat corresponds to the riser, and the riser seat is connected with the cavity of the linin...

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Abstract

The invention discloses a sand-lined metal mold casting technology for a high-manganese steel liner plate. The sand-lined metal mold casting technology comprises design and processing of a metal mold, coating of sand on the metal mold, metal mold pre-heating, smelting casting, cooling and aftertreatment. The sand-lined metal mold casting technology realizes effective combination of a gating system and a feeding system, and effectively improves a feeding capacity of a feed head. Through utilization of a fast cooling capacity of a metal mold, fast molten steel solidification is realized so that high-manganese steel liner plate grains are refined; a good internal shrinkage degree is obtained; shrinkage cavity defects are reduced; surface smoothness and a dimensional precision are greatly improved; product quality is effectively improved; a production cost is reduced; and a service life of the high-manganese steel liner plate is improved. The sand-lined metal mold casting technology effectively solves the problem that the existing metal mold casting technology has a short mold service life and produces liner plate appearance casting defects and problems in production.

Description

technical field [0001] The invention relates to the field of metal mold sand-coated casting, in particular to a metal mold sand-coated casting process for high manganese steel liners commonly used in mine beneficiation. Background technique [0002] At present, high-manganese steel is generally used in mine beneficiation, crusher hammer or blow bar at home and abroad. Because this material has very high toughness and work hardening ability, it is widely used. Most of the workpieces have relatively large thickness. 60-150mm, most of them are produced by water glass sand and clay sand in our country, and some enterprises are produced by lost foam technology, but none of them can solve the internal shrinkage porosity and shrinkage defects of thick and large parts, let alone the roughness of high manganese steel. The problem of coarse grains of grain steel, based on this starting point, the present invention develops a high-manganese steel metal mold sand-coating process, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/08B22C9/06B22C9/02
Inventor 钟敏
Owner NINGGUO DONGDU CASTING
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