Position:China Rare Earth Network>International developments>Produce put together to grind to develop the magnesium alloy that can undertake
Produce put together to grind to develop the magnesium alloy that can undertake
From;  Author:Stand originally
Japanese industry technology is integrated institute (produce put together to grind) with Kyoto university associated development went to have with aluminium (Al) the new-style magnesium of the sex of normal temperature figuration with identical alloy (Mg) alloy pressing delays material. This is to produce put together to grind science of the sources of energy of graduate student of college of wild Jing Zheng and 1000 Kyoto studies researcher of group of research of control of organization of stuff of metal of department of sustainable data research the joint research achievement that major of technology of family energy resources teachs equestrian 渕 to defend. The magnesium alloy that employs new development is pressed delay material, can use general punch to undertake punch is machined, can reduce cost than before and improve manufacturing efficiency.

The magnesium alloy of new development is minim rare-earth element is added in magnesian zinc alloy (cerium) , through hot-rolling (Hot Rolling) make. New-style magnesium alloy forms a kind with general magnesium alloy (AZ31 alloy) disparate gather organization, erichsen cupping value is 9, have the sex of normal temperature figuration that comparatives with aluminium alloy (graph 1) . Accordingly, use do not contain the punch that adds shrinkage fitting buy to also can be machined. Generally speaking, magnesium alloy presses the sex of normal temperature figuration that delays material to be mixed under aluminium iron, because this punch is machined,need will press the epigenesis form that extends material and mould to heat to 250 ℃ above.

The research previously has confirmed as a result, if cerium is added in magnesium, below normal temperature press ductility to be able to rise, but be out of shape the principle still has a lot of places ambiguous. And produce put together to grind to make clear as a result with the research of Kyoto university: Add cerium, can make magnesian cylinder easily slippage. Designed magnesium alloy according to this result, discovery is magnesian to be in as a result - the alloy that has the element such as minim cerium is added to undertake hot-rolling in zincic alloy, can show the sex of normal temperature figuration that comparatives with aluminium alloy, produce put together to grind to organizing the relation with figuration sex to have detailed research with Kyoto university.

The crystallization structure of common magnesium has anisotropy, press ductility to be mixed under aluminium iron (graph 2) . Magnesian slippage department is mixed at underside, cylinder by parallel the 3 slippage department of cone is formed. The CRSS of cone slippage is bigger than the CRSS of underside slippage and cylinder slippage much, below normal temperature basic not slippage. Because this cannot count on C axis direction below normal temperature (graph 2 for fluctuation direction) slippage.

Generally speaking, in delaying the magnesium alloy that makes through pressing, formed underside and the gather that press the parallel that extend a range to arrange to organize 〕 of 〔 graph 3(a) . After forming this kind of gather to organize, underside slippage and cylinder slippage can be in pressure delay direction and board act well on broad direction, and be in board thick way is not effective 〕 of 〔 graph 3(b) . Accordingly, cannot decrease thin magnesium alloy to press delay material, and can rupture in punch treatment initial stage. That is to say, press the sex of normal temperature figuration that delays material to raise magnesium alloy, had better make magnesian gather is organized not with press the parallel that extend a range to arrange. Need delays the formation of medium gather organization through control pressing, make its form underside slippage and cylinder slippage to be in easily board the gather organization with thick effective way.
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