CN101624669A - ZL101A aluminum-silicon alloy - Google Patents

Abstract

The invention provides a ZL101A aluminum-silicon alloy, which comprises the following elements in percentage by weight: 6.5 to 6.95 percent of Si, 0.25 to 0.39 percent of Mg, 0.2 percent of Sb, less than 0.2 percent of Fe, less than 0.2 percent of Cu, less than 0.3 percent of Zn, and the balance of Al and other trace impurities. The alloy also comprises 0.02 to 0.05 percent of Sr. The alloy has the advantages that: by adjusting the contents of the elements in the alloy and adding proper amount of additive of the rare metal Sr for modification, the forms of an alpha solid solution dendritic crystal net and an eutectic crystal Si can be effectively improved(the mass points of the alpha dendritic crystal and the eutectic crystal Si become smaller); the alloy has higher mechanical property, the tensile strength is more than or equal to 295MPa, and the extensibility delta is more than or equal to 7 percent; and the alloy is suitably used for forging parts with higher requirements on mechanical property, such as thin wall castings and the like.

Description

A kind of ZL101A aluminum silicon alloy

Technical field

The present invention relates to the aluminum silicon alloy field.Relate in particular to a kind of ZL101A aluminum silicon alloy.

Background technology

In recent years, because development of science and technology such as modern Aeronautics and Astronautics, communication, electronics, automobile are more and more obvious to the demand of thin-wall aluminum alloy foundry goods, the demand of the waveguide of advanced operational aircraft uptake, guided missile, torpedo shell, instrument department body, radar system and automobile component etc. is more outstanding.The foundry engieering of thin-section casting becomes one of gordian technique of China's aviation aerospace and automobile component manufacturing, and this class thin-section casting has characteristics such as thin-walled, dimensional precision height, internal soundness requirement height.At present, China adopts traditional ZL101A aluminum silicon alloy, the most mechanical property of the thin-section casting of being produced can not be up to standard, the thin-section casting that has can't be shaped at all, though the foundry goods that has is shaped, quality less than assurance, have certain distortion, or have a large amount of subsurface defects, thereby make cast properties not reach requirement.

Summary of the invention

Purpose of the present invention is exactly at present traditional traditional above-mentioned deficiency of ZL101A aluminum silicon alloy, and a kind of high mechanical ZL101A aluminum silicon alloy is provided.

The elementary composition of alloy of the present invention is (weight part per-cent): Si 6.5-6.95%, Mg 0.25-0.39%, Sb 0.2%, Fe＜0.2%, Cu＜0.2%, Zn＜0.3%, surplus heavy Al and few other heavy impurity.It also has Sr 0.02-0.05%.

Advantage of the present invention is: by regulating the constituent content in the alloy and add an amount of additive rare metal Sr processing of going bad in alloy, can effectively improve the form (making α dendrite and eutectic Si particle become littler) of αGu Rongti dendrite net and eutectic Si.Make this alloy have higher mechanical properties, tensile strength 〉=295MPa, unit elongation 6 〉=7%.Applicable to as parts with higher requirements on mechanical property such as casting thin-section casting etc.

Embodiment

Working method of the present invention is with the working method of existing aluminum silicon alloy, the low raw material of selected impure amount, and when melting, adjust the content of each element, what make it to reach alloy elementary compositionly is (weight part per-cent): Si 6.5-6.95%, Mg 0.25-0.39%, Sb 0.2%, Fe＜0.2%, Cu＜0.2%, Zn＜0.3%, Sr 0.02-0.05%, surplus heavy be other impurity of Al and few weight.

Claims (2)

1, a kind of ZL101A aluminum silicon alloy is characterized in that the elementary composition of alloy is (weight part per-cent): Si 6.5-6.95%, Mg 0.25-0.39%, Sb 0.2%, Fe＜0.2%, Cu＜0.2%, Zn＜0.3%, surplus heavy Al and few other heavy impurity.

2. ZL101A aluminum silicon alloy according to claim 1 is characterized in that it also has Sr 0.02-0.05%.