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Metal semi-solid double controlled shaping method

A semi-solid and semi-solid slurry technology, which is applied in the field of semi-solid dual-control forming technology of metals, can solve the problems of poor mechanical properties of devices and difficulty in processing complex parts, etc.

Inactive Publication Date: 2006-09-27
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The die-casting method is easy to form complex thin-walled shell parts, but the mechanical properties of the device are not good; the die forging method is easy to guarantee the quality, but it is difficult to process complex parts; the injection casting method is suitable for magnesium alloys, but it still belongs to the category of rheological die-casting. The mechanical properties of the device are also not good

Method used

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  • Metal semi-solid double controlled shaping method
  • Metal semi-solid double controlled shaping method
  • Metal semi-solid double controlled shaping method

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Experimental program
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specific Embodiment approach 1

[0005] Specific embodiment one: below in conjunction with Fig. 1, figure 2 and image 3 This embodiment will be specifically described. The metal semi-solid slurry or metal semi-solid blank made in the sealed injection chamber 3 is filled from bottom to top at a low speed of less than 1m / s by the filling device 6 at the bottom of the injection chamber 3 less than 200mm long. In the workpiece cavity 10 formed by the template 4, the mold cover 2 and the filling device 6, the metal semi-solid slurry or metal semi-solid blank in the workpiece cavity 10 is then forged by the die forging device 1 from top to bottom to form. The metal semi-solid slurry used is made by the following steps and sent into the injection chamber 3: 1. The metal melt is injected into the slurry chamber 8 by a quantitative device; 2. The slurry chamber 8 is closed; 3. Start The electromagnetic stirrer 11-2 carries out electromagnetic stirring to the metal melt; 4. While stirring, adjust the temperature of...

specific Embodiment approach 2

[0006] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the raw material used is a metal semi-solid blank. It is made through the following steps and sent into the injection chamber 3: 1. The metal blank heated to a temperature 5°C lower than the solidus temperature is placed in the slurry chamber 8 by a dosing device; 2. The slurry chamber 8 is closed; 3. Heating the metal blank to a semi-solid state to spheroidize the crystal grains in the metal blank; 4. Stir the semi-solid metal blank; 5. While stirring, adjust the temperature of the semi-solid metal blank in the slurry chamber 8 Carry out regulation and control to keep the semi-solid metal billet in semi-solid state until the metal semi-solid billet is formed; 6. Send the prepared metal semi-solid slurry into the injection chamber 3 through the one-way valve 7 through the delivery device 9; 7. The injection chamber 3 is closed.

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Abstract

A semi-solid metal shaping method able to precisely control shape and properties of workpiece features the combination of injection casting with die forging. It includes such steps as preparing the semi-solid slurry of metal in the injection chamber, filling it from injection chamber into moulding cavity consisting of formworks, mould sleeve and filler at low speed, and die forging. Its advantages are precise shape and high mechanical performance.

Description

Technical field: [0001] The invention relates to a metal semi-solid dual-control forming technology. Background technique: [0002] At present, semi-solid metal processing consists of three parts: pulping (blank), heating and remelting (limited to thixotropic deformation) and forming. The overall forming can be divided into three types: semi-solid rheological (or thixotropic) die-casting, semi-solid rheological (or thixotropic) die forging and semi-solid injection casting. The die-casting method is easy to form complex thin-walled shell parts, but the mechanical properties of the device are not good; the die forging method is easy to guarantee the quality, but it is difficult to process complex parts; the injection casting method is suitable for magnesium alloys, but it still belongs to the category of rheological die-casting. The mechanical properties of the device are also not good. Invention content: [0003] The invention provides a semi-solid dual-control forming me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D17/00
Inventor 罗守靖姜巨福杜之明
Owner HARBIN INST OF TECH