When CAD and CAE technology are used to assist the design of gating and riser system of sand casting coupling parts, the design steps are different from the previous design ideas; The previous design steps are usually to formulate multiple sets of pouring and riser system tooling of sand...
In sand casting, the gating system is a reserved channel in the sand mold, which is used to guide the high-temperature metal melt into the casting cavity and continuously complete the filling of the cavity. The main requirements for the gating system are: (1) Rapid pouring: reduce the temperature...
The sand casting structure of coupling parts is often simpler than that of finished parts, because many structures of finished sand casting coupling parts can not be obtained directly by casting. The actual finished parts often obtain the approximate structure of parts through casting, and finally obtain the structure...
The investment casting method is adopted for precision casting parts. The process is as follows: select appropriate paraffin material to manufacture the investment mold → repeatedly dip refractory sand on the investment mold → harden and dry the shell → melt the internal investment mold to obtain the mold...
The main causes of poor plasma nitriding of precision casting parts are heat treatment temperature, heat treatment time, nitrogen concentration, ammonia concentration, vacuum degree in heat treatment furnace, surface roughness of casting parts, oxidation before quenching and quenching, oxidation before quenching and tempering, oxidation in casting parts and oxidation...
Metallographic structure and scanning electron microscope observation of the alloy select the parts with serious corrosion and take samples along the direction perpendicular to the axis of the test bar. The results of metallographic analysis, scanning electron microscope analysis and micro zone composition energy spectrum analysis of the structure...
1. Chemical composition of corrosion products on the surface of cast parts In order to prevent other foreign impurities from mixing in the test process, avoid collecting surface corrosion products with iron tools during sampling, directly use conductive adhesive to take the corrosion products on the surface of cast...
The solid models of sand mold casting, sand core, sprue and riser are made in the form of part modeling. These solid models of sand mold casting parts are of regular structure, the specific drawing process is relatively simple, and the detailed process will not be described one by...
Riser refers to the structure artificially set in the pouring and riser system to store metal liquid. In the pouring process of sand castings, the riser mainly plays a role in compensating the shrinkage cavity and porosity that may occur in the liquid shrinkage and solidification shrinkage stages in...
1. Structure description of sand casting coupling parts Based on the above reasons, this topic adds the working condition mechanical property analysis of parts to the sand casting process design, and puts this part before the specific sand casting process design, hoping to analyze the weak areas of parts,...