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Cast production method of heavy truck front axle

A casting production, heavy-duty vehicle technology, applied in the direction of casting molding equipment, casting molds, cores, etc., can solve the problems of low success rate of casting products, many casting processes, high scrap rate, etc., achieve stable spheroidization treatment, and improve service life , the effect of improving toughness

Inactive Publication Date: 2015-05-20
QINGDAO XUSHENG HEAD
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

In the current casting process of the front axle of heavy-duty vehicles, the success rate of the finished castings is low, not only the casting process is more, which affects the production capacity, but also the workmanship is poor, and the scrap rate is high

Method used

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Embodiment

[0017] The casting production method of the heavy-duty vehicle front axle of the present embodiment comprises the following steps:

[0018] (1) The ductile iron front axle blank is produced by alloying copper and nickel. Both copper and nickel alloying elements have the advantages of strengthening the metal matrix, improving the hardenability of the material, and improving the machinability of the material after austempering. This material The choice of Cu0.8%, Ni1.5%;

[0019] (2) The spheroidization adopts the cover bag flushing method, that is, the spheroidization treatment in the spheroidization bag with a cover forms a volume extinguishing device, so that the magnesium vapor cannot escape freely and the spheroidization process is more stable;

[0020] (3) The molding method adopts the iron mold sand covering method, that is, the casting process method of covering a layer of resin sand on the iron mold mold, which improves the cooling speed of the ductile iron...

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Abstract

The invention provides a cast production method of a heavy truck front axle, and belongs to machinery. Copper-nickel alloying isothermal quenching ductile iron is adopted in the method, has higher strength and toughness when compared with conventional copper-molybdenum alloying isothermal quenching ductile iron, and can prolong the service life of the front axle. The blank of the front axle is cast through an iron-mould coated sand technology method; and a tundish pouring method is employed during spheroidizing and enables the spheroidising more stable. Machining is employed before isothermal quenching in the method, and the front axle is prevented from deformation. The isothermal quenching treatment is carried out on a salt furnace production line containing a protective atmosphere, and a matrix structure of austenite+acicular ferrite is generated, so that the toughness of the front axle is greatly improved. The cast production method is advantaged in that material revolution of replacing forging with casting and replacing steel with iron is realized; heavy forging equipment and die investment are saved; a production cycle is shortened; and the cast production method has obvious economic benefits and social benefits.

Description

[0001] technical field [0002] The invention belongs to the technical field of casting, and in particular relates to a casting production method of a front axle of a heavy-duty vehicle. [0003] Background technique [0004] A diesel engine is composed of many parts, such as the body, cylinder head, crankshaft, piston, oil pump, supercharger, etc., with different casting and processing methods. In the current casting process of the front axle of heavy-duty vehicles, the success rate of the finished castings is low, not only the casting process is more, which affects the production capacity, but also the manufacturability is poor, and the scrap rate is high. [0005] Contents of the invention [0006] In order to overcome the above-mentioned technical problems existing in the prior art field, the purpose of the present invention is to provide a casting production method for the front axle of a heavy-duty vehicle, which can directly cast diesel engine cylinder heads and b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/04C22C33/08B22C9/06C21D1/20
Inventor 杜学梅
Owner QINGDAO XUSHENG HEAD
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