The core pulling molding sand casting technology commonly used in the production of cast impeller and the assembly and welding technology commonly used in the preparation of complex investment mold divide the large and complex cast impeller into two parts: complex blade and simple hub and spoke. For the...
In order to improve the mechanical properties of zg1cr18ni9ti stainless steel impeller investment casting sand casting, reduce segregation and improve corrosion resistance. Solid solution treatment (as cast) → stabilization heat treatment process was selected in the experimental process. 75kW air electric furnace is selected for heating. 1. Solution treatment...
a. Gas cutting process parameters The gas cutting equipment of impeller investment casting sand casting pouring and riser adopts g01-300 cutting torch gas cutting (No. 4 annular cutting nozzle), oxygen cylinder and acetylene cylinder. See table for process parameters. Amplitude H / mm Swing frequency / (times / min)...
Due to the low plasticity and work hardening of investment casting sand casting stainless steel impeller, it is difficult to cut stainless steel by common cutting technology. At present, the common cutting methods of stainless steel include plasma arc cutting and oxyacetylene flame vibration gas cutting. Although plasma arc...
When the mold shell of impeller investment casting sand casting part and the sand mold of wheel hub and spoke part are prepared, the last process of molding – mold closing can be entered. Through this process, the impeller investment casting sand casting composite mold is obtained. a. Prepare...
a. Formulation of molding materials Impeller investment casting sand casting molding material is the most important factor in casting production. It is related to the form of thermal action and chemical reaction when molten steel contacts it, so as to determine the surface quality of blank. In the casting...
a. Sand consumption The distance between the impeller investment casting sand casting pattern and the inner wall and top of the sand box is called the sand consumption. In order to prevent fire escape and mold leakage during the impeller investment casting sand casting pouring, the appropriate sand consumption...
(1) Impeller investment casting – sand casting weight The weight of each impeller by investment casting sand casting is about 1.5kg, and the total weight of 54 impellers by investment casting sand casting is 1.5 kg × 54=81kg Impeller investment casting – sand casting wheel hub, spoke and rim...
(1) Comparison of riser number of wheel hub in investment casting sand casting Check whether an impeller investment casting sand casting riser is sufficient: the effective distance of an impeller investment casting sand casting riser is L = 4.5t (t casting wall thickness is approximately 50mm), then l =...
(1) Impeller investment casting – Determination of specific shape and size of riser of wheel flange in sand casting According to the specific shape of impeller investment casting sand casting rim, the standard waist round open riser is also selected. M flange = 2.27 according to the data: A...