What are the characteristics of aluminum alloy forgings?
b. High strength, high specific stiffness, high specific modulus of elasticity, high fatigue strength, suitable for lightweight requirements of the key stress components, and its comprehensive performance is much higher than other materials. c. Fine internal organization, uniformity, no defects.
c. The internal organization is fine, uniform, no defects, its reliability is much higher than aluminum alloy casting and die casting, also higher than other materials casting. d. The plasticity of aluminum alloy is very high.
d. Aluminum alloy plasticity is good
And can be processed into a variety of complex shapes of high-precision forgings, The machining allowance is small, only about 20% of the machining allowance for aluminum alloy tensile thick plate, greatly saving time and cost. I
e.Aluminum forgings have good corrosion resistance, thermal conductivity and non-magnetism; the surface is smooth and beautiful, the surface treatment performance is good, beautiful and durable.
Analysis of deformed aluminum alloy malleability
Malleability definition and measurement index:
(1) Definition of Aluminum Alloy Malleability. Aluminum alloy malleability (fluidity) refers to the ability of aluminum alloy to fill the mold groove under the action of external force. High malleability means that the billet has a high capacity to fill the mold grooves.
(2) Malleability Measurement Indicators. Malleability is often measured by the plasticity and deformation resistance of the metal, the higher the plasticity and the smaller the deformation resistance, the better the malleability. Malleability depends on the nature of the aluminum alloy (plasticity and strength limit) and processing conditions. Malleability is a measure of the ease of obtaining good parts through plastic processing of metal process performance indicators.
Aluminum Alloy Malleability Characteristics: Aluminum alloy malleability characteristics refer to the comparison of malleability with carbon steel and low alloy structural steel.
Characteristics of high-temperature deformation resistance of aluminum alloy:
(1) The difference in high-temperature deformation resistance of various aluminum alloys is large. Aluminum alloy deformation resistance (also called flow stress) with the composition of different and obvious changes, In some low-strength aluminum alloys and medium-strength aluminum alloys, such as 6000 series aluminum alloy high-temperature deformation resistance is low, and high-strength aluminum alloy, especially Al-Zn-Mg-Cu aluminum alloy, such as 7000 series aluminum alloy high-temperature deformation resistance. Such as forging aluminum 2A50 aluminum alloy with a 500 ℃ strength limit of 20 MPa, and due to aluminum 2A12 aluminum alloy 500 ℃ strength limit of 40 MPa, the difference between the two is two times, that is, the required forging deformation load difference of about 2 times.
② Most commonly used deformation of aluminum alloy room temperature deformation resistance is lower than carbon steel, but its high-temperature deformation resistance has three kinds: lower than carbon steel, carbon steel and equivalent, and higher than carbon steel.
③ Aluminum alloy deformation resistance is very sensitive to temperature (with the temperature increase or decrease in rapid change): with the temperature drop, its high-temperature deformation resistance grows rapidly, faster than carbon steel. A comparison of Table 1 and Table 2 shows that the high-temperature strength limit grows faster than that of carbon steel and low-alloy structural steel. The temperature of carbon steel and low-alloy structural steel decreases by 100℃, and the strength limit increases by about 50%, while the temperature of the aluminum alloy decreases by 50℃, and the strength limit increases by about 50% to 300%. Therefore, aluminum alloy, especially the high degree of alloying aluminum alloy can not be in the temperature of low working conditions under the final forging, so the aluminum alloy forging temperature range is narrow, and the operation should be rapid. Aluminum alloy dies forging production of deformation resistance to determine the material itself strength limit, processing conditions, and the complexity of the forgings.
