Method for preparing semisolid blank

A semi-solid and blank technology, applied in the field of semi-solid blank preparation, can solve the problems of small sample size, uneven structure and performance, etc., and achieve the effect of high deformation efficiency, uniform performance and refined structure
CN103233190AInactive Publication Date: 2013-08-07KUNMING UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
KUNMING UNIV OF SCI & TECH
Publication Date
2013-08-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for preparing a semisolid blank, utilizes an improved SIMA (strain induced melt activation) method to prepare the semisolid blank, and belongs to the technical field of metal semisolid blank. The method comprises the following steps of: firstly, measuring a liquid solid phase line point of the semisolid alloy to be prepared, then, heating an alloy blank so as to carry out asynchronization multitrack rolling or pillar squeezing transformation, finally, remelting, and carrying out heat preservation for a long time so as to obtain the required semisolid blank. The asynchronization rolling or pillar squeezing transformation is capable of generating large deformation amount, group bough crystal formed in the blank is destroyed, the asynchronization rolling is utilized to replace pre-deformation processes such as the existing upset, compression, equal diameter angle compression, and the semisolid blank is prepared and has the advantages of uniform formation, high nodularity, and accurate control solid phase rate.
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Description

technical field

[0001] The invention relates to a method for preparing semi-solid blanks, belonging to the technical field of metal semi-solid blanks. Background technique

[0002] In the 1970s, Professor Flemings of the Massachusetts Institute of Technology and others developed a brand-new metal forming method called semi-solid processing technology. It is a method of forming metals according to their characteristics during the transition from liquid to solid or from solid to liquid (that is, the coexistence of liquid and solid). This new forming method combines the advantages of solidification processing and plastic processing, that is, the processing temperature is lower than that of the liquid state, and the deformation resistance is smaller than that of the solid state. It can form parts with complex shapes and high precision and performance quality requirements with a large amount of deformation at one time. Therefore, Semi-solid processing technology is known as the ...

Claims

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