Influence of Stoma on Properties of Aluminum Alloy Castings
ã€China Aluminum Network】Air holes are also called air eyes. They are one of the more common defects in foundry production. They are mainly produced in the interior and surface of castings. In the scrap of castings, the porosity accounts for a large proportion. Let's learn about the air holes below. Impact on the performance of aluminum alloy castings.
The effect of pores on the properties of aluminum alloys is mainly manifested in the reduction of the density of the castings and the decrease of the mechanical properties. Therefore, in the production practice of aluminum alloy castings, it is important to strengthen the research on the effect of the stomatal grade on the mechanical properties, and to ensure the quality of aluminum alloy castings by controlling the pinhole grade.
Pinhole rating, low magnification test according to GB10851-89, when in dispute, according to the provisions of Table 2; X-ray photography according to GB11346-89 aluminum alloy casting pinhole grading standards, the standard selection of two commonly used in industrial production The alloy ZL101 (Al-Si-Mg) and ZL201 (Al-Cu-Mn) alloys and the determination of бb and σ5 in the T4 state show that (ZL101T4, ​​ZL201ST4 mechanical properties of various pinhole samples are shown in the table 3, Table 4): The mechanical properties of the casting and the pinhole grade are linearly related. As the pinhole grade level increases, the mechanical properties gradually decrease; every increase in the pinhole grade, the mechanical бb drops about 3%, σ5 About 5% drop. For performance test requirements for aluminum alloy castings, see page 9
It should be pointed out here that, due to the wall thickness effect of the casting, even if the severity of the pinhole is the same, the mechanical properties of the wall thickness are reduced, and the wall thickness is small. Because the mechanical properties of castings depend on a variety of factors, not only related to the pinhole grade, but also related to the fluctuation of the chemical composition of the alloy, the solidification rate of the casting, the effect of heat treatment, and the existence of other defects, so the same level of pinhole samples Mechanical properties will fluctuate within a fairly large range.
bbq grill, bbq grill mesh, Grill Grate, stainless wire bbq grill,Bbq Grill Metal Mesh,etc. It is suitable for indoor and outdoor barbecue.
Barbecue wire grill grate is made of high quality 304 stainless steel, never rusting and durable. BBQ Wire mesh does not have any coating or chemical ingredients, making food safer.
Barbecue wire grill grate is made of high quality 304 stainless steel, never rusting and durable. BBQ Wire mesh does not have any coating or chemical ingredients, making food safer.
bbq grill mesh,stainless wire bbq grill,Bbq Grill Metal Mesh,cooking grate,bbq grill grates stainless steel
Shenzhen Lanejoy Technology Co.,LTD , https://www.szlanejoy.com