Steel Sand Casting

MaterialSteel, Stainless Steel, Ductile Iron, Grey Iron, Aluminum, Bronze, Copper, Brass, and customized material from clients.Material GradeASTM, DIN, GB, BS, JIS, AISI, NF, etcProcessSand Casting,Weight1kg- 500kgToleranceCT 6-9 grade, and based on the custom drawingsDrawing (files) formatIgs, Stp, X-T PDF, Jepg, JpgCapabilities of ProductionAluminum: More than 80 Mt per month.Stainless Steel: More than 200 Mt per month.Surface TreatmentAnodize/Zinc Plating/ Nickel Plating, Tinting/ Polishing/Blacking, etcMOQDepends on the items, please contact us for freeHeat TreatmentQuenching, Normalizing, Annealing, Plating,CarburizingApplicationsAutomotive, Agricultural Machines, vessels, Tooling, Mining, Oil & gas industry, Locomotive industry, Aerospace, Hardware, Construction, Engineering Machine, Electrical Equipment, etcMachining EquipmentThreading, Turning, Milling, Grinding, CNC/NC, Boring, Test facilitiesMeasuring ToolsGauge, Thread gauge, Height Gauge, Vernier caliper, Depth caliper, Micrometer, CMM, etcQC SystemFully inspection before DeliveryAvailable ServiceOEM & ISOPayment TermsL/C, D/A, D/A,T/T, PayPalShipment TermsFOB, CIFSamplesFew Samples are acceptableCertificationIS9001:2008.Tooling leadtime10-15 working daysProduction leadtime15 working days, based on the quantity of demandFAQ:Q 1.Why should we send inquiry to you? We are professional one-stop customized mechnical parts and service provider.We have the word-class foundry equipment and technology processing.We had 5 years of castings experience in exporting.We can bespoke manufacture of drawing,samples mapping,raw material processing and design manufacture according to your originality. Q 2.How long can we get the price list?We are factory direct best price.So our price list will be quoted within 24 hours after we get your inquiry with detailed informations (such as drawings, material,technology specification,surface treatment,quantity, special requirements and etc) Q 3.How about quality of your castings parts? After you confirmed the quotation for pattern cost,raw casting cost,machining cost and coating cost.We will send to you the sample for you inspection approval. Q 4.How about your after market service We could confidential of the quality of delivered parts and compensate 100% on defective parts. Q 5.What`s your Minimun Order Quantity(MOQ)According to your requirement that only one piece can customized for you.Investment casting processStep 1: Mould engineering & productionWith precision investment castings, the first step involves the engineering and production of a mould also known as a wax tool. Moulds are made from aluminum or steel. This mould is developed in-house by hoohi engineers and serves as a negative of the final casting. It is important that the mould is made accurately, so that the required tolerances and surface roughness can be achieved. Depending on the size of the series, the mould is installed either onto a manual or automated press.Step 2: Wax model spraying & Tree buildingThe mould is filled with liquid wax. After the wax has been cooled down, ejectors in the mould push the wax model out. A wax model has now been sprayed which is identical to the final casting. These wax models are glued onto a so-called wax tree with a casting funnel on top, into which steel is poured in a later stage of the processStep 3: Rinsing the wax treesAfter the wax models have been glued onto a wax tree, they are rinsed. Any possible contaminations on the surface are removed to ensure a successful attachment of the ceramic onto the wax tree.Step 4: Building ceramic layersAfter rinsing the wax tree, the tree is given a fireproof ceramic shell. This shell is constructed after repeatedly submerging the tree (up to 7 or 9 times) in a slurry and sprinkling it with ceramic sand. The ceramic layers are then hardened in a drying chamber where they are exposed to air.Step 5: AutoclaveAfter the layers have been formed and dried, the wax is melted out of the ceramic tree by using steam (120°C) in an autoclave. This is why it is called “lost wax casting”. The majority of the molten wax can be regenerated and is reusable.Step 6: SinteringThe ceramic tree is then baked (stoked) at temperatures of around 1100°C and reaches its final strength through the sintering process. Any wax remains are burned out during this process.Step 7: CastingThe desired steel alloy is melted in a large furnace and brought to cast temperatures. The ceramic tree is, at the same time, heated in an oven to prevent thermal shocks during the pouring process. After the tree has been heated, it is removed from the oven by a robotic arm and filled up with a steel alloy by use of counter gravity. When the trees have been poured, they are placed on a cooling conveyor where they are cooled down. (with nitrogen).Step 8: Ceramic removalThe trees are then removed from their ceramic shell by using a fully-automatic hammer to break the shell. This removes the majority of the ceramic. The next step is to cut the products from the trees by sawing or vibrating. The steel leftovers will be sorted based on alloy and can be melted again during the next casting sessionStep 9: BlastingThe Finishing Department removes the last pieces of ceramic by means of steel, sand and/or water blasting.Step 10: GrindingThe ingate which remained after the sawing process, is grinded from the casting. To grind the product properly, a grinding fixture is often applied.Step 11: Visual inspectionThe Quality Department checks all products visually for possible casting failures. This check takes place according to a quality standard sheet to ensure that all possible surface failures are corrected properly. Thanks to this procedure, you can be assured that hoohi only delivers high quality castings.Step 12: Machininghoohi has the capabilities to machine castings in house, such as drilling holes, tapping threads and turning & milling activities. This enables hoohi to deliver a completely machined component that is ready-to-install.Step 13: Heat and- or surface treatmentSome alloys require heat treatment to achieve a certain hardness, tensile strength or elongation according to 2D drawing specifications. The standard heat treatments are performed in-house, the complex treatments are outsourced. hoohi also has the know-how to perform a surface treatment for a casting. Surface treatments involve the coating process of a steel surface, to enhance the looks of the surface or protect it against external influences such as corrosion (rust) and natural wear (damage).Step 14: Final inspectionThe final step in this process is another visual check and when necessary composing a measurement report and material analysis. After the final inspection, the products are ready for shipment to another satisfied Hoohi customer.The Elements Used in SteelCarbon (C): Carbon, a nonmetallic element, forms a number of organic and inorganic compounds and can be found in coal, petroleum and limestone. It is the principle strengthening element in carbon steels and low-alloy steels. Atomic number 6, atomic weight 12.01115.Manganese (Mn): Manganese is a brittle, metallic element that exists in the ore of pyrolusite. When making steel, it reacts with sulfur and helps to increase the metal's resistance to heat. Atomic number 25, atomic weight 54.9380.Phosphorus (P): Phosphorus is a poisonous, nonmetallic element that helps protect metal surfaces from corrosion. Atomic number 15, atomic weight 30.9738.Sulfur (S): Sulfur is a nonmetallic element found mainly in volcanic and sedimentary deposits. Sulfur, in the form of iron sulfide, can cause steel to be too porous and prone to cracking. Atomic number 16, atomic weight 32.064.Silicon (Si): Silicon is the second most abundant element in the earth's crust and can be found in rocks, sand and clay. It acts as a deoxidizer in steel production. Atomic number 14, atomic weight 28.086.Nickel (Ni): Nickel is a hard, metallic element that found in igneous rocks. Without nickel, stainless steel would be less resistant to heat and corrosion. Atomic number 28, atomic weight 58.71.Chromium (Cr): Chromium, a metallic element, is found in the earth's crust. It is used in the production of stainless steel to make the steel resistant to oxidation and corrosion. Atomic number 24, atomic weight 51.996.