欧美午夜精品久久久久免费视_中国性孕妇孕交tv_日韩人妻无码精品久久免费一_欧美深夜福利_伊人网五月天_办公室挺进少妇双腿间小说

Centrifugal casting is a technology and method that liquid metal is injected into the high-speed rotating mold to make the liquid metal fill the mold and form the casting. Because of the centrifugal movement, the liquid metal can fill the mold well in radial direction and form the free surface of the casting; the cylindrical inner hole can be obtained without using the core; the gas and inclusion in the liquid metal can be eliminated; the crystallization process of the metal is affected, so as to improve the mechanical and physical properties of the casting.

Suitable for the following casting fields
① Bimetallic cast iron roll
② Heat resistant steel roller table at furnace bottom
③ Special steel seamless steel pipe
④ Brake drum, piston ring blank, copper alloy worm gear;
⑤ Special shaped castings such as impellers, metal dentures, gold and silver mesons, small valves and cast aluminum motor rotors.

Centrifugal casting was initially used to produce cast pipes, and then the process developed rapidly. Centrifugal casting process is used in metallurgy, mining, transportation, drainage and irrigation machinery, aviation, national defense, automobile and other industries at home and abroad to produce steel, iron and non-ferrous carbon alloy castings. Among them, centrifugal cast iron pipe, cylinder liner and shaft sleeve of internal combustion engine are widely produced. For some forming tools and gear castings, centrifugal force casting can also be used for mold shell, which can not only improve the precision of castings, but also improve the mechanical properties of castings.

Advantages:
① There is almost no metal consumption in gating system and riser system, which can improve the process yield
② Therefore, the metal filling capacity can be greatly improved, the ratio of casting wall thickness to length or diameter can be reduced, and the production process of sleeve and pipe castings can be simplified.
the production process of long tubular castings can be simplified
③ The casting has high density, less porosity and slag inclusion, and high mechanical properties
④ It is easy to manufacture composite metal castings such as steel backed copper sleeve and bimetallic roll, etc. when forming the castings, the filling capacity of metal can be improved by centrifugal movement, so thin-walled castings can be produced.