How to improve the quality of precision casting

H2. 1.Process planning: Strictly control the process, before the tanks, to ensure that the appearance and the sand core is with temperature condition, to ensure when pouring molten steel liquid, on appearance coarse broken place choose luck gentleman family ISOMOL300 alcohol-based zircon powder coating to brush after ignition baking, make mould appearance lubrication

H3. 2.Mould plan: Stainless steel castings appearance with the top from the mold, the mold of the handle clean appearance, namely appearance using sandpaper nitro paint after rub-up, choose metal or plastic mould for high precision castings, progressive die appearance of finish

H4. 3.The rounded planning: To avoid occur when stainless steel forging white, in addition to the adopted measures from the technology, it is necessary to make its wall thickness too thin, when more than 15 mm wall thickness, type with metal forging casting choose the rounded corner is necessary

H5. 4.Wall thickness planning: Because of the rapid heat dissipation of the metal, the minimum wall thickness of the stainless steel forging should be larger than that of the sand type forging

H6. 5.Grind the planning: The grinding process removes the burr of the flying edge, which is not smooth to the surface, and is polished and lubricated. As for the finished casting, the grit size of the steel shot is 0. 85-1. 4mm, hardness hrc40-50, maximum hardness error plus or minus HRC3. 0.

H7. 6.The material planning: The raw materials, the outer type and the core use zirconium sand resin sand, the number 75-150, the choice of hot solid resin, mixed with the sand, the high refractoriness, the appearance lubrication, the break good, the sand is simple.

the quality of precision casting, iron casting products china