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Casting equipment and method using solid-liquid two-phase region temperature as casting mold temperature

A technology of mold temperature and casting equipment, which is applied in the field of casting equipment at the temperature of the solid-liquid two-phase region, can solve the problems of difficulty in casting metals with a wide solid-liquid two-phase region, low production efficiency, and problems with the smoothness and quality of the surface of the billet. Poor performance and other problems, to achieve the effect of compact structure, improved product quality, and excellent plastic processing performance

Active Publication Date: 2010-09-01
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The object of the present invention is to provide a kind of mold temperature that is the temperature of the solid-liquid two-phase region of the metal being cast (that is, the mold temperature is kept between the solidus temperature and the liquidus temperature of the metal to be cast, hereinafter referred to as this casting The casting equipment and method (hereinafter referred to as "two-phase zone casting") can solve the problem of poor surface finish, quality and performance of slabs produced by traditional continuous casting and semi-continuous casting methods. , hot-type continuous casting and directional solidification methods are difficult to apply to the casting of metals with a wide solid-liquid two-phase region and low production efficiency

Method used

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  • Casting equipment and method using solid-liquid two-phase region temperature as casting mold temperature
  • Casting equipment and method using solid-liquid two-phase region temperature as casting mold temperature
  • Casting equipment and method using solid-liquid two-phase region temperature as casting mold temperature

Examples

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Effect test

Embodiment 1

[0022] QSn6.5-0.1 tin-bronze wire with a diameter of 10mm was formed by continuous casting in two-phase zone. QSn6.5-0.1 tin bronze melt (1) flows into the mold (4) in the two-phase region from the crucible (2); adjust the power of the induction heater (5), and control the temperature of the mold to 940 ° C. Obtain QSn6.5-0.1 tin bronze solid-liquid mixture (3); cooler (7) adopts the cooling water that temperature is 25 ℃, flow rate is 1700L / h to carry out forced cooling to QSn6.5-0.1 tin bronze; traction mechanism ( 8) Continuous drawing at a drawing speed of 90 mm / min to obtain a QSn6.5-0.1 tin bronze wire (6). The prepared QSn6.5-0.1 tin bronze wire has good surface finish, relatively uniform distribution of chemical components, and dense internal structure. There are fine grains in some columnar grain boundaries, a large number of columnar grains contain one or several other grains, and some grain boundaries are obviously zigzag.

Embodiment 2

[0024] The QSn6.5-0.1 tin bronze pipe with an outer diameter of 12mm and a wall thickness of 2mm is cast in the two-phase zone. QSn6.5-0.1 tin bronze melt (1) flows into the two-phase region mold (4) from the crucible (2); adjust the power of the induction heater (5) to control the mold temperature to 1020°C, Obtain QSn6.5-0.1 tin bronze solid-liquid mixture (3); Cooler (7) adopts the cooling water that temperature is 15 ℃, flow rate is 900L / h to carry out forced cooling to QSn6.5-0.1 tin bronze; Traction mechanism ( 8) Continuous drawing at a drawing speed of 200 mm / min to obtain a QSn6.5-0.1 tin bronze pipe (6). The prepared QSn6.5-0.1 tin bronze pipe has good internal and external surface smoothness, relatively uniform distribution of chemical components, and dense internal structure. Composed of columnar grains, and some columnar grain boundaries have fine grains, a large number of columnar grains contain one or several other grains, and some grain boundaries are obviousl...

Embodiment 3

[0026]A QSn6.5-0.1 tin bronze plate with a width of 25mm and a thickness of 5mm was formed by semi-continuous casting in the two-phase region. QSn6.5-0.1 tin bronze melt (1) flows into the two-phase zone mold (4) from the crucible (2); adjust the power of the induction heater (5) to control the mold temperature to 980°C, Obtain QSn6.5-0.1 tin bronze solid-liquid mixture (3); cooler (7) adopts the cooling water that temperature is 20 ℃, flow rate is 1300L / h to carry out forced cooling to QSn6.5-0.1 tin bronze; traction mechanism ( 8) Continuous drawing at a drawing speed of 150 mm / min to obtain a QSn6.5-0.1 tin bronze sheet (6). The prepared QSn6.5-0.1 tin bronze plate has good surface finish, relatively uniform distribution of chemical components, and dense internal structure. There are fine grains in some columnar grain boundaries, a large number of columnar grains contain one or several other grains, and some grain boundaries are obviously zigzag.

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Abstract

The invention discloses casting equipment and a casting method using solid-liquid two-phase region temperature as casting mold temperature, and belongs to the technical field of metal casting. The casting equipment is characterized by consisting of a crucible, two-phase region casting molds, a heater, a cooler and a traction mechanism, wherein one or more two phase region casting molds are arranged below, above or beside the crucible; the casting mold is insulated and heated through the heater or heated by using the heat which is conducted by the cast metal melt before entering the casting mold so as to keep the casting mold temperature between the solidus temperature and the liquidus temperature of the cast metal; the cast metal is forcibly cooled through the cooler which is arranged close to the outlet of the casting mold or a cooling device which is arranged at the outlet of the casting mold and can move along the casting direction; and the traction mechanism is used for drawing a metal casting blank. The equipment of the invention has the advantages of simple structure, convenient operation and repair, high production efficiency and wide application range and can industrially produce the high-quality metal casting blank with high strength, high plasticity, high surface finish, high dimensional accuracy, high compactness and low or no segregation in batches.

Description

technical field [0001] The invention belongs to the technical field of metal casting, and in particular provides a casting equipment and method in which the mold temperature is the temperature of the solid-liquid two-phase region of the metal to be cast. Background technique [0002] With the continuous development of metallurgical technology and material science and engineering technology, casting technology has been more and more widely used in metal production. The quality of the slab affects the metal forming process, product quality and production cost to a large extent. Improving the surface finish and plastic processing performance of the slab can effectively improve the quality of the formed product and the utilization rate of the material. The surface is smooth and the structure is dense. The slab with uniform composition can be directly applied or plastically processed into products. With the development of metal materials and processing technology, the requiremen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D27/04
CPCB22D11/10B22D11/08B22D27/04
Inventor 刘雪峰
Owner UNIV OF SCI & TECH BEIJING
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