Wall Protection

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Stainless Steel CF8 (304) Precision Investment Casting for shaft hood of diving pump.
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Quick Detail:
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1. SS304 hood of a shaft on a diving pump;
2. Manufactured by silica sol lost wax process;
3.?Max size: 500*500*350mm;
4. Max Weight: 80kg;
5. Chemical composition tested by German spectrometer;
6. ISO9001:2008 certificated;
7. PED/ AD2000 certificated;
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Description:


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We cast stainless steel, carbon steel, alloy steel up to size 500*500*350mm; NDT service available;
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The most common materials that Winnington cast:

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Stainless Steel (70%) | Carbon Steel | Alloy Steel |
CF3M (AISI 316L), CF8M (AISI 316), CF8 (AISI 304),CD4MCu, CD4MCuN,ANC20,1.4408,1.4517, 1.4306, 303,? 430, 420, 17-4PH, SCS1 and more | 1020, 1040, SCS16, SCS14, SCS13, 1.0619, WCB, S355JR, 1045 , LCC and more | 4140,?8Q,?ANC2,CLA12C,42CrMo,6150 and more |
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Winnington uses Lost Wax Method for casting:
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1. Mold making. ?A wax mould is made according to the CAD system.? 2. Wax Model-making. Molten wax is poured into the mould and formed a model that exactly same shape as the cast part.? 3. Wax assembly. The wax patterns are connected to the runner system by hot knife according to certain rules. When this finish, a pattern tree is ready.? 4. Slurry. The wax pattern tree is dipped into a slurry of silica, then into a sand-like stucco, or dry crystalline silica of a controlled grain size. The slurry and grit combination is called ceramic shell mould material, although it is not literally made of ceramic. This shell is allowed to dry, and the process is repeated until at least a half-inch coating covers the entire piece. The bigger the piece, the thicker the shell needs to be.? 5. Burnout. The ceramic shell-coated piece is placed cup-down in an autoclave, who hardens the silica coatings into a shell, and the wax melts and runs out. This process makes hollow in the shell where formerly occupied by the wax. 6. Pouring. The shell is preheated in the clave to harden the patches and remove all traces of moisture, then placed cup-upwards onto a sand bed. Metal is melted in a furnace, then poured carefully into the shell. The shell has to be hot because otherwise the temperature difference would shatter it. The filled shells are then allowed to cool. 7. Release. The shell is hammered or sand-blasted away, releasing the rough casting. The gates, which are also created in metal, are cut off. 8. Machining and finishing. The casting is shot blasted and then machined to required tolerance if necessary. Further finish like plating or polishing can also be operated according to customer needs. ? ? ?
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Applications:
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Pumps
Valves
Pipe Fittings
Marine, Gas and Oil
Machinery
Automotive
Power & Energy
Other Mechanical Castings
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Specifications:
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Standards | ASTM,JIS,DIN,BS,MIL |
Maximum Casting Size | 500*500*350mm |
Casting weight | 10g~80kg |
Wall thickness | 1.5-2mm Min |
Casting process type | silica sol lost wax casting |
Machining | CNC machining, CNC lathe |
Surface finish | electro polishing, satin, hand polished, pickled, zinc plating, vibratory polishing; |
Tolerances | According to VDG P690 |
Physical performance | Tensile test, Impact test, Hardness test |
Chemical composition test | Spectrometer |
NDT test | Dye test, X ray test etc |
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Competitive Advantage:

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By injecting wax into a permanent-molding die to form a pattern, investment casting became the solution for many complex parts that are required in large quantities and almost applicable for all alloy.? ?