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Application of cast Al Si (Al-Si) alloy

2015年10月18日 字體:
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Application of cast Al Si (Al-Si) alloy

Al Si (Al-Si) alloy, the general Si mass fraction for 4%~22%. Al-Si alloy has excellent casting properties, such as good fluidity, good air tightness, low shrinkage and high thermal tendency. It has good mechanical properties, physical properties, corrosion resistance and medium machining performance. The characteristics and applications of common cast Al-Si alloys are as follows:

(1) ZL101 (A) alloy ZL101 alloy has good air tightness, fluidity and thermal cracking resistance. It has good mechanical properties, welding performance and corrosion resistance. The composition is simple and easy to be cast. It is suitable for all kinds of casting method. At present, ZL101 alloy has been used in the complex parts, such as aircraft parts, instruments, instrument case, engine parts, automobile and ship parts, cylinder block, pump body, brake drum and electrical parts. In addition to the ZL101 alloy as the basis for strict control of impurities, and by improving the casting technology to get the ZL101A alloy with higher mechanical properties, has been used to cast a variety of shell parts, aircraft pump, car gearbox, fuel tank, aircraft parts and other parts of the load.

(2) ZL102 alloy ZL102 alloy has the best heat resistance, good air tightness, good air tightness, good fluidity, no heat treatment, low tensile strength, suitable for pouring large thin wall complex parts, mainly suitable for die casting. At present, this kind of alloy is mainly used for the thin wall castings with low load and complex shape, such as a variety of instrument case, automobile casing, dental equipment, piston, etc..

(3) ZL104 alloy ZL104 alloy with good air tightness, fluidity and thermal cracking resistance, high strength, corrosion resistance, welding performance and cutting performance is good, but the low heat resistance, easy to produce small pores, casting process is more complex. Therefore its current is mainly used for manufacturing under high load of the large size of sand mold casting, such as the motivation in the box, cylinder block, cylinder valve cover, belt wheel, a cover plate toolbox etc. aircraft, ship and automobile parts.

(4) the mechanical properties of ZL105 alloy ZL105 alloy are high, the casting performance and welding performance are satisfactory. The machining performance and heat resistance of the alloy are better than those of the ZL104 alloy, but the plastic is low, the corrosion stability is not high, and it is suitable for all kinds of casting method. At present, the alloy is mainly used in the production of bearing load of aircraft, engine of sand mold and metal mold casting parts, such as the motivation in the box, a cylinder body, a hydraulic pump casing, and instrument parts, but also to do bearing and other machine parts. In addition, on the basis of ZL105 alloy lower Fe content of impurities in the development of zl105a alloy, due to its higher strength and elongation, at present also has be made to bear the load of high quality castings, such as aircraft of the crankcase, a valve casing, impeller, cooling water jacket, hood, bearing and engine and machine of other parts.

(5) ZL106 alloy ZL106 alloy with moderate mechanical properties and good flow properties, satisfactory thermal cracking resistance, and is suitable for sand mold and metal mold casting. At present, this kind of alloy is mainly used in the form of complex and static load of parts, which require high gas tightness and parts, such as the pump body and the water cooled cylinder head, which work at higher temperatures.

(6) of ZL107 alloy ZL107 alloy for cast in the sand mold and metal mold, with good air tightness, fluidity and thermal cracking performance, and good mechanical properties and machinability. It was mainly used for diesel engine crankcase, piano with the production of plate and frame, oil cover and the handle of the valve, the cylinder head and the typewriter framework parts.

(7) ZL108 alloy ZL108 alloy has good casting properties, high strength, small thermal expansion coefficient and good wear resistance. In addition, its high temperature performance is satisfactory, generally used for metal mold casting. At present, this kind of alloy is mainly used in the internal combustion engine piston and the hoisting pulley and other parts.

(8) ZL109 alloy ZL109 alloy is suitable for metal type casting, has excellent fluidity, good air tightness and thermal cracking resistance, good high temperature strength and low temperature expansion coefficient. It is typically used as belt wheel, shaft sleeve and piston and piston of diesel engine, can also start lifting pulley etc..

(9) ZL110 alloy ZL110 alloy with moderate mechanical properties and good heat resistance, applicable to sand mold and metal mold casting process, alloy density, linear expansion coefficient for internal combustion engine piston, oil nozzle and pump manufacturing and other parts. But need to pay attention to is that due to the alloy thermal expansion coefficient, when used in the manufacture of the piston may will produce "cold knock the Jura" phenomenon.

(10) ZL111 alloy ZL111 alloy has good air tightness and thermal cracking and excellent fluidity, high strength, good fatigue performance and affordability, easy welding and good corrosion resistance, suitable for sand, metallic pressure casting. At present, this kind of alloy is mainly used in the manufacture of complex and high load parts, such as the casting of aircraft and missile.

(11) YL112 alloy YL112 is die casting alloy, with good casting properties and mechanical properties, good liquidity, the tightness of the thermal crack, commonly used for gear box, air cooling cylinder head, radio transmitters machine, mower hood and gas dynamic brake casting.

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