2results about How to "Avoid air holes" patented technology

This invention discloses a composite strengthening process for the surface of a hot-dip galvanized molten zinc transfer pump impeller, comprising the following steps: ① impeller surface pretreatment; ② supersonic spraying of a WC+15%Co coating; ③ laser remelting: laser remelting the WC+15%Co coating; ④ precision polishing of the remelted layer: polishing the WC+15%Co coating to achieve a surface roughness <Ra0.4μm; ⑤ PVD TiCN functional coating deposition: preparing a TiCN functional coating on the WC+15%Co coating surface using physical vapor deposition, achieving a TiCN coating surface roughness <Ra0.2μm. This composite strengthening process, through the synergistic treatment of supersonic spraying, laser remelting, and PVD coating, effectively seals surface pores in cast steel and cast iron impellers while simultaneously providing excellent corrosion resistance and zinc adhesion resistance. This completely solves the technical problem of cast steel and cast iron impellers being prone to zinc adhesion and corrosion in molten zinc, significantly extending impeller service life and improving hot-dip galvanizing production efficiency.

The utility model relates to a kind of for casting battery box assembly bearing bracket's casting structure, including horizontal die head, horizontal die head below is equipped with casting runner, the lower side of casting runner is equipped with several groups of tree support cavity, each group of tree support cavity is connected with casting runner by ingate;Group tree support cavity is formed by 3-9 bearing bracket cavities in turn, and split gap is equipped between adjacent bearing bracket cavities. When using, several groups of tree support cavities are arranged in parallel, and multiple bearing bracket cavities of each group of tree support cavities share an ingate, after mold group casting forming, utilize cutting machine to split the multiple parts of combination, improve production efficiency. At the same time, the use amount of medium temperature wax and metal raw material is reduced, the cracking risk when shell dewaxing is reduced, easy to operate, improve the yield of casting, save cost.