Titanium casting

carbon steelironsteel

Lost Wax Investment Casting is centered on using fusible materials such as wax and plastic to create fine and meltable models. On the model, refractory coatings are applied layer by layer, and through drying and hardening, it is integrated into an integral shell. The model is then melted by heating, while the shell is fired at high temperatures to become more fire-resistant. Finally, liquid metal is injected into the mold shell. After cooling, the required casting is formed.Features:Form extremely complex parts: As a metal forming process, lost wax investment casting can form extremely complex parts. Compared with die-casting, sand casting, lost foam casting, and other processes, investment casting allows the highest complexity of parts. It can be used to combine components originally processed by other techniques into a single part.Good appearance quality: Investment casting has good appearance quality and low surface roughness, reaching Ra3.2um. In some cases, it can eliminate secondary machining or surface treatment processes such as painting.High dimensional accuracy: Compared with other casting processes, investment castings have higher dimensional accuracy.Material flexibility: There are no restrictions on the metal materials for investment casting, including carbon steel, alloy steel, heat-resistant alloys, stainless steel, precision alloys, permanent magnetic alloys, bearing alloys, copper alloys, aluminum alloys, titanium alloys, and ductile iron, etc.Dimensional tolerance of investment casting (±mm):The maximum external dimensions of the castingLevel oneLevel twoLevel three1~30.10.120.253~60.10.160.306~100.10.200.3610~180.120.240.4318~300.140.280.5230~500.20.340.6250~800.20.400.7480~1200.30.460.87120~1800.30.531.00180~2600.50.601.15Process:Wax mold forming: Wax material is pressed into the mold cavity, forming a wax mold after cooling and removal.Group Tree: Multiple wax molds are welded to the pouring system.Shell-making: Prepared silica sol coating is dipped on the wax mold surface, then refractory sand is sprinkled. The shell is dried and hardened under specific conditions, forming a dense refractory coating. This is repeated 5-6 times to form a strong shell.Dewaxing and roasting: High-temperature steam melts and removes the wax inside the shell, creating a cavity. The shell is then baked at around 1000°C for 1-2 hours to burn off residual wax and moisture.Smelting and casting: Ingredients are mixed according to product requirements, molten steel is smelted, tested, and poured into the mold shell in the red shell state, forming a blank.Sand removal and cutting: After cooling, the shell is removed manually or by machine, and the casting is cut and separated from the system. Further polishing and machining can be performed as needed.Applications:Aerospace industryAutomobile industryMedical devicesIndustrial machineryFAQ:What are the disadvantages of investment casting?The biggest drawback is its relatively high cost due to the complicated process and long production cycle, as well as the costs of wax molds, coatings, and refractory sand. It is more suitable for medium and large batches. For small batches, 3D printing can be used for wax molds. The maximum casting weight is about 1000Kg. Quality control is challenging due to many influencing factors.Which parts are suitable for investment casting?Parts weighing 200g to 50kg, medium and large-scale production, high dimensional accuracy requirements, need to reduce/eliminate machining, and complex internal structures.What factors affect the delivery time?Complexity of parts, material selection, production scale, and process optimization.Technical Specifications / Characteristics:Process: Lost wax investment castingMaterial compatibility: Carbon steel, alloy steel, heat-resistant alloys, stainless steel, precision alloys, permanent magnetic alloys, bearing alloys, copper alloys, aluminum alloys, titanium alloys, ductile iron, etc.Surface roughness: Ra3.2umDimensional tolerance: See table aboveMaximum casting weight: up to 1000KgApplications: Aerospace, automotive, medical, industrial machinery