Equal channel deformation mould for preparing block body ultrafine grain metal
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- 溧阳常大技术转移中心有限公司
- Publication Date
- 2009-04-29
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Abstract
Description
technical field
[0001] The invention relates to a mold for metal plastic processing, in particular to an equal-channel deformation mold for preparing bulk ultrafine-grained metal. Background technique
[0002] The bulk ultrafine-grained metals of 0.1-1 μm have a series of excellent physical and mechanical properties due to the small grain size and unique defect structure such as high-angle grain boundaries. The preparation of bulk ultrafine-grained materials by strong plastic deformation has attracted great attention. Traditional pressure processing techniques such as rolling, extrusion, drawing, etc. can refine grains, but the shape and size of the workpiece after processing often limit its application; grain refinement to ultra-fine grain usually requires a true strain greater than 4, Therefore, traditional plastic processing technology is difficult to meet these requirements. More than 20 years ago, when the former Soviet scholar Segal was studying the deformation textu...