For cast iron, you will only be able to file small chips of metal off.Ĥ.Perform a melting test if you have extra metal to work with.
If it is cast steel, you should be able to file a continuous chip. If the metal generates red sparks, it is cast iron and if it generates white sparks, it is cast steel.ģ.File a piece of metal off your sample using a metal file or a chisel. The surface of cast steel is dark gray, sometimes referred to as 'steely.' In contrast, both white and gray cast iron have a duller and less shiny gray appearance.Ģ.Perform a spark test by holding the edge of your metal sample against the cutting edge of a grinding wheel. If you do not want to tarnish any of your material, you may be able to tell the difference through simply looking at the metals.ġ.Identify the metallic material by looking at its raw surface color. You can perform ests to identify between the two metals, some which are slightly destructive. Cast steel is more reliable for more complicated castings because it is more flexible and has a higher resistance to tension than cast iron. Cast iron is cheaper, requires less energy for casting and has a lower melting point than cast steel. Although the chemical compound of the two metals is very similar, the slightest variation can change the properties widely, meaning that they are used in very different situations.įor welding, pipe fitting, plumbing or other work with metal, you need to be able to tell the difference between cast iron and cast steel.
Impeller casting: [ Because of advances in metallurgy numerous metals can be used in a wide range of applications. Due to the heat resistant alloy material, hard machining parts, that cannot be complex shape or difficult to use other methods, therefore, need for manufacturing a new precision molding process, so the handed down from ancient times and the lost wax casting process improvement, materials and modern investment casting method in ancient process on the basis of the development of important gain. When air jet engine development, manufacture, impeller blades as complex shape and nozzle, etc, and the surface is bright and clean the size precise meritett papir parts. Modern investment casting method in practical application in industrial production in the 1930’s. Zenghou yi tomb honour for multiple disk base of each coil dragon, end to end, fluctuation, forming hollow tubular multi-layer moire among these patterns using common patterns, casting, and to make with lost wax casting method, can use without strength, easy to carving wax, use common tools can be carved by the zenghou yi tomb of paraffin wax statue plate material handicraft, then add gating system, coating, dewaxing, pouring, can get fine zenghou yi tomb honour. As the ancient civilizations, China is using this technique, one of the early centuries BC, in ancient China’s labor created the lost wax casting technique, with various fine decorative pattern and casting of the text ZhongDing and vessels products, such as spring when zenghou yi tomb honour plate etc. Revestment precision casting is in ancient wax casting developed on the basis of. It not only applicable to all types, various alloy casting, and produce the precision and surface quality of castings than other casting method to high, even other casting method to cast the complex, high temperature resistant, not easy machining castings, all can use revestment precision casting casting. Lost wax casting method is called revestment precision casting, is a little or no cutting cutting of casting process, is one of the foundry industry outstanding technology, its application is very extensive. Required blank In the molten iron casting, curing cavity after shelling shell, can obtain precise manufacturing finished. To obtain enough thickness after dry, warm, make interior wax pattern, and melting consistent die-cavity.
In the wax models layers of liquid brush high-temperature sand. The method with casting, the original casting wax wax models. It can get relatively accurate shape and high precision casting.Ī common approach is needed to make the blank: firstly, and then using electrodes electrode, corrosion mode formed cavity. Precision casting method is the use of non-metallic mold,and the size of its product is more accuracy than ordinary sand mold casting method.The precision casting includes investment casting,ceramic mold casting,metal casting, pressure casting,and lost foam casting.The precision casting is compared with the traditional casting a foundry method.