The breed of die-casting aluminium alloy

The breed of die-casting aluminium alloy

Al-Mg alloy
The functional characteristic of Al-Mg aluminium alloy is: Room temperature is mechanical the function is good; Corrosion resistance is strong; Forging the function is poorer, of mechanical function shake and mural profound effect is bigger; When be being used for a long time, have make the plasticity of alloy is reduced because of effect of effectiveness for a given period of time, and even the idea that suppresses cast to present craze; The liability that controls cast to produce stress to corrode crackle is bigger also wait. The blemish part of Al-Mg alloy offsetted its good qualities, make its suffer sure tie in use respect.
Al-Zn alloy
Al-Zn aluminium alloy presses cast classics after seasoning, can obtain taller mechanical function, be more than when quality mark of zinc 10% when, intensity progresses apparently. The blemish of this alloy is to be able to bear or endure corrode sex is poor, have the tendency that stress corrodes, when die-casting easy hot tearing. Commonly used Y401 alloy fluidity is good, easy circumfuse antrum, blemish is to form stomatic tendentiousness big, when content of silicon, iron is little, easy hot tearing.
Al-Si alloy
Because Al-Si aluminium alloy has crystallization temperature interval,photograph of the silicon in small, alloy has very big coagulation coefficient of systole of latent heat and larger specific heat capacity, line is smaller also wait for a characteristic, consequently its forging the function should compare other aluminium alloy normally had better, its are filled model gift is nicer also, hot tearing, shrink loose inclination is less also. The brittleness photograph that Al-Si contains in crystal in all (silicon photograph) quantitative at least, quality mark is only 10% order about, consequently its plasticity compares other aluminium alloy in all crystal is good, the brittleness appearance that puts only still can pass metamorphism to handle further progress plasticity. The experiment still makes clear: Al-Si in all crystal condenses in its bit of plasticity that adjacent temperature still maintains crackajack, what other aluminium alloy does not have this. Forging alloy arrangement middling wants to have proper amount in all crystal, forging crackajackly in order to assure its function; The accretion of crystal amount can make alloy becomes fragile again and reduce mechanical function in all, both between existence opposes surely. But because of Al-Si in all crystal has crackajack plasticity, can better as a whole mechanical function and forging function the demand of two respects, so Al-Si alloy is to use most extensive die-casting aluminium alloy currently.
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