Titanium and titanium alloy castings in the form of pouring system
Straight Bypass: The sprue is the passage of liquid titanium from the large beaker or center runner into the titanium casting cavity, usually round. This is because this shape is easy to manufacture and reduces the heat loss of the injected titanium liquid. The diameter of the sprue used for titanium and titanium alloy castings should be larger than that used for steel and aluminum castings so that the titanium alloy fluid quickly reaches the casting cavity in a short period of time. The diameter shall be determined according to the weight of the titanium casting and the amount of metal to be poured once; the length of the sprue is determined by the height of the casting or module.
Rivers and gates: The runner and gates are the access to the drill stream flowing from the sprue and quickly enter the titanium casting cavity. The runners are usually rectangular and their dimensions are determined by the wall thickness of the cast. The shape of the gate is usually trapezoidal elliptical cylinder structure, the slope around the same with the riser, the cross-sectional size according to the size of the cast to determine.
Riser: Titanium and titanium alloy liquid due to low heat, but also in the vacuum pouring, cooling, and thus the ability to fill as steel, fill short distance. Therefore, the riser of titanium and titanium alloy castings is usually larger than the steel castings, the number of steel castings and more. The shape and size of the riser and the size of the titanium and titanium alloy castings have a significant effect on the shrinkage. As early as the 20th century, 60 years, the Soviet Union was on the titanium and titanium alloy casting filling the installation of the test. The best inclination is 7 ° -9 °. Due to the different shape of the casting, the shape of the riser can be conical, trapezoidal, elliptical, elliptical. (Including machined graphite type) The size or diameter of the casting riser shall be 2.5 times the thickness of the shrinkage hot junction; the investment casting shall be not less than 3 times the thickness of the hot fill junction, The height of the riser usually takes 1.5-2 times its thickness or diameter. When the riser is placed, the arc at the bottom of the riser and the casting must be smooth and smooth, so as to avoid inclusions or local reactions. Due to the short distance of the titanium alloy casting riser, it is also effective to obtain a dense casting, often with a tapered riser (also called a subsidy) in a place where it needs to be replenished. For titanium and titanium alloy castings, aluminum alloy castings commonly used cold iron is ineffective.
Straight Bypass: The sprue is the passage of liquid titanium from the large beaker or center runner into the titanium casting cavity, usually round. This is because this shape is easy to manufacture and reduces the heat loss of the injected titanium liquid. The diameter of the sprue used for titanium and titanium alloy castings should be larger than that used for steel and aluminum castings so that the titanium alloy fluid quickly reaches the casting cavity in a short period of time. The diameter shall be determined according to the weight of the titanium casting and the amount of metal to be poured once; the length of the sprue is determined by the height of the casting or module.
Rivers and gates: The runner and gates are the access to the drill stream flowing from the sprue and quickly enter the titanium casting cavity. The runners are usually rectangular and their dimensions are determined by the wall thickness of the cast. The shape of the gate is usually trapezoidal elliptical cylinder structure, the slope around the same with the riser, the cross-sectional size according to the size of the cast to determine.
Riser: Titanium and titanium alloy liquid due to low heat, but also in the vacuum pouring, cooling, and thus the ability to fill as steel, fill short distance. Therefore, the riser of titanium and titanium alloy castings is usually larger than the steel castings, the number of steel castings and more. The shape and size of the riser and the size of the titanium and titanium alloy castings have a significant effect on the shrinkage. As early as the 20th century, 60 years, the Soviet Union was on the titanium and titanium alloy casting filling the installation of the test. The best inclination is 7 ° -9 °. Due to the different shape of the casting, the shape of the riser can be conical, trapezoidal, elliptical, elliptical. (Including machined graphite type) The size or diameter of the casting riser shall be 2.5 times the thickness of the shrinkage hot junction; the investment casting shall be not less than 3 times the thickness of the hot fill junction, The height of the riser usually takes 1.5-2 times its thickness or diameter. When the riser is placed, the arc at the bottom of the riser and the casting must be smooth and smooth, so as to avoid inclusions or local reactions. Due to the short distance of the titanium alloy casting riser, it is also effective to obtain a dense casting, often with a tapered riser (also called a subsidy) in a place where it needs to be replenished. For titanium and titanium alloy castings, aluminum alloy castings commonly used cold iron is ineffective.
