Thermal mold casting method

A technology of warm mold and mold casting, applied in the field of warm mold casting, which can solve the problems of poor surface finish, quality and performance of billet, inability to use pure metal and eutectic alloy, low production efficiency of directional solidification method, etc., and achieve compact structure , high production efficiency and wide application range

Active Publication Date: 2013-06-26
UNIV OF SCI & TECH BEIJING
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the temperature of the low-heat mold of warm mold casting is lower than the temperature of the heated mold and the two-phase zone mold, but higher than the temperature of the cooled mold, it can solve the problems produced by traditional continuous casting, semi-continuous casting and semi-solid casting methods. The surface finish, quality and performance of the slab are poor, the hot continuous casting method has low production efficiency and high energy consumption, it is difficult to produce a large cross-section slab, and it is easy to leak. The directional solidification method has low production efficiency and high energy consumption. The length is limited, the output is low, the energy consumption of the two-phase zone casting method is high, the casting speed cannot be too fast, and the semi-solid casting and two-phase zone casting methods cannot be used for the preparation of pure metals and eutectic alloys, etc.

Method used

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Effect test

Embodiment 1

[0030] A pure aluminum rod with a diameter of 20mm is formed by warm continuous casting. The pure aluminum melt 1 flows into the low-heat mold 3 from the crucible 2 filled with argon protection; the power of the induction heater 4 is adjusted to control the temperature of the low-heat mold 3 to 550°C; the temperature of the cooler 6 is 15°C, and the flow rate is 1000L / h of cooling water is used to forcibly cool the pure aluminum; the traction mechanism 8 performs continuous drawing at a casting speed of 50mm / min to obtain the pure aluminum rod 5 . The prepared pure aluminum rod has a good surface finish, dense internal structure, and the microstructure mainly consists of columnar crystals inside the pure aluminum rod parallel or approximately parallel to the casting direction and equiaxed crystals on the surface of the pure aluminum rod. Composition, and excellent quality and performance.

Embodiment 2

[0032] The outer square side length is 20mm, and the inner circular hole diameter is 10mm. The pure copper profile is formed by warm casting. The pure copper melt 1 flows into the low-heat mold 3 from the crucible 2 filled with argon protection; the power of the induction heater 4 is adjusted to control the temperature of the low-heat mold 3 to 900°C; the temperature of the cooler 6 is 18°C, and the flow rate is The pure copper is forcibly cooled by 600L / h of cooling water; the drawing mechanism 8 is continuously drawn at a casting speed of 100mm / min to obtain the pure copper profile 5 . The prepared pure copper outer square inner circle profile has good inner and outer surface smoothness, dense internal structure, and the microscopic morphology mainly consists of columnar crystals inside the pure copper profile that are parallel or approximately parallel to the drawing direction and equiaxed crystals on the surface of the pure copper profile. Microstructural composition, and ...

Embodiment 3

[0034] Cu-12wt%Al aluminum-bronze alloy sheet with a width of 25mm and a thickness of 5mm was formed by warm-molding continuous casting. The Cu-12wt%Al aluminum bronze alloy melt 1 flows into the low-heat mold 3 from the crucible 2; the power of the induction heater 4 is adjusted to control the temperature of the low-heat mold 3 to be 850°C; the temperature of the cooler 6 is 20°C, and the flow rate is The Cu-12wt%Al aluminum bronze alloy was forcibly cooled by 800L / h cooling water; the traction mechanism 8 was continuously drawn at a drawing speed of 80mm / min to obtain the Cu-12wt%Al aluminum bronze alloy sheet 5. The prepared Cu-12wt%Al aluminum bronze alloy sheet has good surface finish, relatively uniform chemical composition distribution, dense internal structure, and microscopic morphology mainly composed of columnar crystals and aluminum bronze alloy sheets parallel or approximately parallel to the drawing direction inside the aluminum bronze alloy sheet. The surface la...

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Abstract

The invention provides a thermal mold casting method. The thermal mold casting method is characterized by comprising the following steps of: heating a casting mold by a heater, or heating the casting mold by utilizing heat conducted by a metal melt before entering the casting mold so as to maintain the temperature of the casting mold to be in the range lower than the temperature of a solid phase line of metal and higher than the cooling temperature of the casting mold; carrying out forced cooling on the metal by a cooler arranged near an outlet of the casting mold; and drawing a metal casting blank by using a traction mechanism. The thermal mold casting method provided by the invention has the advantages that the application range is wide, the promotion value is very large, high-quality metal casting blanks with excellent performance, good surface smoothness, high size accuracy, high compactness, more uniform components, columnar crystal parallel or approximately parallel to the jiggering direction in the metal and isometric crystal concurrent microstructures on the surface layer of the metal can be produced with low energy consumption and high efficiency, and the subsequent plastic processing with a large screw-down rate can be carried out according to the need.

Description

technical field [0001] The invention belongs to the technical field of metal casting, and in particular provides a warm mold casting method. Background technique [0002] Casting plays a pivotal role in the production of metals. With the continuous increase of metal materials and product varieties, the rapid expansion of application fields, the rapid development of high-tech and the improvement of people's living standards, the world is facing the current situation of environmental degradation, resource and energy shortages, and the energy saving of metal casting process The requirements for consumption reduction, short process, high efficiency, low cost and slab quality are getting higher and higher. [0003] The casting mold is a container for turning liquid metal into solid metal in casting and obtaining the required shape of the slab. It is the key component and "heart" in casting and plays an important role in the quality and output of the slab. At present, the molds...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/055B22D27/04
Inventor 刘雪峰章鸣罗继辉伍伟玉谢建新
Owner UNIV OF SCI & TECH BEIJING
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