Bronze Casting

1.Material:Ductile iron,Iron,stainless Steel,Carbon Steel, Alloy Steel, Aluminum, brass, or on request of customer2.Process:Silicasol casting process and machining.3.Weight range:0.01-150KG4.Size:As per the customer's drawings and requirements5.SurfaceTreatment:painting,polishing, galvanization etc and as per customers" requirement6.Heat Treatment:Annealing, normalizing ,quenching+tempering,solution treatment and as per customer's requirement.7.Inspection:Factory in-house self check or Third Party inspection8.Certificate:ISO9001-20089.Delivery:By sea, air or express according to customers' requirementFAQ:1. How to get a quotation?Please send us drawings in igs, dwg, step etc. together with detailed PDF.If you have any requirements, please note, and we could provide professional advice for your reference.2. What if we do not have drawing?Samples would be available, and we would send you drawing to confirm.Of course, we would ensure the safety of the drawing.3. How to pay?For small quantity, we could provide Paypal, Paypal commission will be added to the order.For the big one, T/T is preferred.4. How to ship?For small quantity, we have cooperation with TNT, FEDEX, UPS etc.For big quantity, air or sea would be available for you to choose.5. What about the packing details?We attached our normal packing details.If you have any special requirements, we would be willing to help.6. What about the delivery time?It would be 20-30 days normally for the parts to be ready and we had a system to ensure the time.When you made your order, you would know.Copper and Copper Alloys Casting ProblemsPure copper is extremely difficult to cast as well as being prone to surface cracking, porosity problems, and to the formation of internal cavities. The casting characteristics of copper can be improved by the addition of small amounts of elements including beryllium, silicon, nickel, tin, zinc, chromium and silver.Copper alloys in cast form (designated in UNS numbering system as C80000 to C99999) are specified when factors such as tensile and compressive strength, wear qualities when subjected to metal-to-metal contact, machinability, thermal and electrical conductivity, appearance, and corrosion resistance are considerations for maximizing product performance. Cast copper alloys are used for applications such as bearings, bushings, gears, fittings, valve bodies, and miscellaneous components for the chemical processing industry. These alloys are poured into many types of castings such as sand, shell, investment, permanent mold, chemical sand, centrifugal, and die casting.The copper-base casting alloy family can be subdivided into three groups according to solidification (freezing range). Unlike pure metals, alloys solidify over a range of temperatures. Solidification begins when the temperature drops below the liquidus; it is completed when the temperature reaches the solidus. The liquidus is the temperature at which the metal begins to freeze, and the solidus is the temperature at which the metal is completely frozen.Group I alloys……Group II alloysGroup II alloys are those that have an intermediate freezing range, that is, a freezing range of 50 to 110oC between the liquidus and the solidus. Group II alloys are: beryllium copper (C81400, C82000, C82200, C82400, C82500, C82600, C82800), silicon brass (C87500), silicon bronze (C87300, C87600, C87610, C87800), copper-nickel (C96200, C96400).Beryllium Coppers. These alloys are very toxic and dangerous if beryllium fumes are not captured and exhausted by proper ventilating equipment. They should be melted quickly under a slightly oxidizing atmosphere to minimize beryllium losses. They can be melted and poured successfully at relatively low temperatures. They are very fluid and pour well.Silicon Bronzes and Brasses. The alloys known as silicon bronzes, UNS alloys C87300, C87600, and 87610, are relatively easy to melt and should be poured at the proper pouring temperatures. If overheated, they can pick up hydrogen. While degassing is seldom required, if necessary, one of the proprietary degasifiers used with aluminum bronze can be successfully used. Normally no cover fluxes are used here. The silicon brasses (UNS alloys C87500 and C87800) have excellent fluidity and can be poured slightly above their freezing range. Nothing is gained by excessive heating, and in some cases, heats can be gassed if this occurs. Here again, no cover fluxes are required.Copper-Nickel Alloys. These alloys (90Cu-10Ni, UNS C96200 and 70Cu-30Ni, UNS C96400) must be melted carefully because the presence of nickel in high percentages raises not only the melting point but also the susceptibility to hydrogen pickup. In virtually all foundries, these alloys are melted in coreless electric induction furnaces, because the melting rate is much faster than it is with a fuel-fired furnace. When ingot is melted in this manner, the metal should be quickly heated to a temperature slightly above the pouring temperature and deoxidized either by the use of one of the proprietary degasifiers used with nickel bronzes or, better yet, by plunging 0.1% Mg stick to the bottom of the ladle. The purpose of this is to remove all the oxygen to prevent any possibility of steam-reaction porosity from occurring. Normally there is little need to use cover fluxes if the gates and risers are cleaned by shot blasting prior to melting.