In Magnesium Alloy Die Casting what is the effect of temperatur

• Posted by Ruby Mike March 14, 2022 - Filed in Technology - #alloy die casting company  - 660 views

  Here, we will discuss the characteristics of zinc alloy die casting supplier and the impact that temperature has on zinc alloy die casting supplier.
  
  Die Casting of Magnesium-Alloy Components
  
  Magnesium alloy is the lightest metal structural material available, weighing between 1.75 and 1.90 grams per cubic centimeter. Because of this, it has higher specific strength than aluminum alloys and steels, but alloy die casting company is only slightly weaker than the fiber-reinforced plastics with the highest specific strength. In addition to having excellent machining performance, it is also simple to process and has a low processing cost, and it requires only 70% of the processing energy of aluminum alloy. Because of this, it outperforms low carbon steel in terms of corrosion resistance, and alloy die casting company outperforms die-casting aluminum alloy A380 in terms of corrosion resistance. Its vibration damping and electromagnetic shielding properties are significantly superior to those of aluminum alloy. In addition, because of its low density, low melting point, low dynamic viscosity, low specific heat capacity, low phase transformation latent heat, and low affinity with iron, magnesium alloy has the advantages of low melting energy consumption, fast mold filling speed, fast solidification speed, short actual die-casting cycle, and long die service life, among other characteristics. When used in conjunction with modern die-casting technology, it is particularly well suited for forming thin-walled and complex parts on the spot.
  
  Aside from that, the performance of magnesium alloy die castings is excellent, and the effect of replacing steel and aluminum alloy parts with plastic and other parts under standard operating conditions is very good. While achieving the product's light weight, Zinc alloy die casting factory also allows the product to perform exceptionally well in terms of special functions. As soon as the magnesium alloy die castings are scrapped, they can be recycled and repurposed, which satisfies the requirements for environmental protection.
  
  Changing Temperature Has an Effect on Magnesium Alloy die cast with good plastic toughness, certain strength, and excellent corrosion resistance at room temperature, Die Casting AZ91D is a good choice for die casting applications.
  
  When the pouring temperature is between 660 and 685 degrees Celsius, the tensile strength and elongation of the AZ91D alloy increase as the pouring temperature is raised. However, it is clear that the temperature at which the liquid is poured has a significant impact on the elongation. When the pouring temperature is greater than 685 °C, the tensile strength and elongation of the material decrease as the pouring temperature is raised higher. Exceptionally long elongation values are observed when the pouring temperature exceeds 700 degrees Celsius, but the overall trend of elongation decreases. It has been found that when the pouring temperature is 660 to 680 °C, the impact toughness and hardness of die-casting magnesium alloy AZ91D increases slightly with the increase in pouring temperature; however, when the pouring temperature is 700 °C or higher, these properties do not increase. When the pouring temperature is between 680 and 700 degrees Celsius, the impact toughness and hardness increase significantly as the temperature rises. It is important to note that when the pouring temperature is higher than 700 °C, the hardness of the poured material decreases dramatically with the increase in temperature. The impact toughness reaches its maximum temperature between 700 and 710 degrees Celsius, and the impact toughness is expected to decrease as the temperature is raised indefinitely.
  
  The effect of pouring temperature on the mechanical properties of AZ91D alloy is investigated when the injection specific pressure is 70MPa, the injection speed is 3.0m/s, and the mold temperature is 200 °C. This is done while taking into consideration the influence of various factors. In this study, it was discovered that the best mechanical properties of the die-casting sample can be obtained when the pouring temperature is 685 °C; the tensile strength can reach 263 MPa and the elongation can reach 225% at this temperature. Insufficient mold filling can occur as a result of pouring temperatures that are too low, and defects such as cold shut and insufficient mold filling are common as a result. If the pouring temperature is too high, zinc alloy die casting supplier is easy to produce splash, burr, and serious shrinkage cavity and porosity defects in magnesium alloy die castings, which reduces the mechanical properties of magnesium alloy die castings and aggravates the thermal impact on the die castings. If the pouring temperature is too low, it is easy to produce splash, burr, and serious shrinkage cavity and porosity defects in magnesium alloy die castings. As a result, the pouring temperature is 685 degrees Celsius.
  
  It was determined that the effect of mold temperature on the mechanical properties of die-casting magnesium alloy AZ91D was significant when the other process parameters were held constant. Die-casting magnesium alloy AZ91D has a high tensile strength and a high hardness, which first increase with an increase in molding temperature. When the mold temperature exceeds 200 °C, the tensile strength curve changes more violently than the hardness curve, but zinc alloy die casting is clear that the tensile strength curve changes more violently than the hardness curve when the mold temperature exceeds 200 °C. When the tensile strength and hardness of the material reach their maximum values, the mold temperature is 200 degrees Celsius and 197 degrees Celsius, respectively. The elongation of magnesium alloy decreases with increasing mold temperature, but it can be seen that the elongation value changes little in the range of 180 to 210 degrees Celsius, which demonstrates that the mold temperature has little effect on the elongation of the alloy in this range. Initially, the impact toughness of the alloy is relatively stable in the temperature range of 180–190 °C, then it increases with an increase in temperature, and finally its value is relatively stable in the temperature range of 200–210 °C and higher.
  
  To summarize, the effect of die casting mold temperature on the mechanical properties of AZ91D alloy is essentially the same as the effect of pouring temperature on mechanical properties. Mold temperature is important because it affects cooling speed, which can result in the rapid formation of hard shell on the surface of magnesium alloy die castings. This is not conducive to mold filling and solidification feeding, and it is easy to form cold barrier. If the mold temperature is too high, it can result in adhesive strain on the surface of magnesium alloy die castings. The results of the tests and analyses show that the pouring temperature and mold temperature have the greatest influence on the mechanical properties of the AZ91D alloy, with the least influence being pouring temperature and mold temperature. It is possible to achieve stably the mechanical properties of die-casting AZ91D alloy when the die-casting process parameters (injection specific pressure 70MPa, injection speed 3.0m/s, mold temperature 200 °C, pouring temperature 685 °C) are optimized. The mechanical properties of die-casting AZ91D alloy are b=263MPa and 5=225%.
  
  In die-casting AZ91D alloy, the pouring temperature is the most significant factor, followed by the mold temperature; the mechanical properties of die-casting AZ91D alloy can be consistently achieved under appropriate die-casting process parameters (injection specific pressure 70MPa, mold temperature 200 °C, pouring temperature 685 °C) b=263MPa, 5=225%.
  
  

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