"IF YOU CAN DRAW IT, WE CAN MAKE IT!"TECHNOLOGY FOR THE 21ST CENTURY
Four Precautions for Stainless Steel Casting Parts
In order to prevent the white cast when Stainless Steel Casting Parts, in addition to take measures from the process, the wall thickness must not be too thin (some data indicate that the wall thickness of 15mm or more, the corners of the metal casting castings must be rounded , For aluminum alloy, magnesium alloy casting casting casting round should not be less than 3-4m.
Due to the non-conformance of the metal type and the core, the casting slope of the stainless steel casting parts should be appropriately larger than the sand castings, generally 30% -50%, for easy removal of the castings and draw-out forms. It should be noted that the casting pitch In addition to the type of alloy, the height of the wall, but also with the location of the casting surface, where the casting cooling contraction with the metal surface tends to deviate from the casting surface can be designed to a smaller slope, and tend to shrink the casting Casting on the metal surface should be given a larger slope, a variety of alloy cast stainless steel casting slope.
As metal-type heat dissipation, so the minimum wall thickness of stainless steel casting parts should be larger than the sand castings to be larger, a variety of casting alloys, casting the smallest wall thickness of different sizes.
The thickness of the inner wall and the inner rib of the stainless steel castings shall generally be 0.6-0.7 of the thickness of the connected outer wall. Otherwise, the inner wall (rib) will be cooled slowly, and cracks easily occur at the junction of the inner and outer walls when the castings shrink.
The thickness of die-castings has a great influence on the quality of castings. Taking aluminum alloy as an example, a thin wall has a higher strength and a better compactness than a thick wall. Therefore, to ensure that castings have sufficient strength and rigidity conditions, should be as much as possible to reduce its wall thickness, and to maintain uniform wall thickness. Casting the wall is too thin, the metal welding is not good, affecting the strength of castings, while creating difficulties to shape; wall thickness is too large or serious uneven shrinkage and cracks are easy to produce. With the increase of wall thickness, the internal porosity, shrinkage and other defects also increase, also reduce the strength of castings.