Additive manufacturing technologies for propeller making

摘要

Mecklenburger Metallguss GmbH (MMG) is a foundry with one of the largest capacities for casting of aluminium and copper alloys. The main product of MMG are propellers with diameter up to 11m for the maritime industry, but the company's manufacturing scope is much wider than that. There are more than 150 different alloys in its portfolio, ranging from aluminium bronze and tin bronze over brass and gunmetal to special aluminium alloys. In MMG's alloy tree (see Figure 1) it can be found ideal material properties for a wide range of products, e.g. bushes, bearings, jackets, spindle-nuts, pumps, valves, gear houses or even sculptures and many more. Customers will find the ideal alloy depending on their needs:1.Resistant against sea water, acid or base corrosion,2.Resistance against erosion, cavitation and abrasion,3.Optimal mechanical properties (strength, elongation, hardness, impact resistance),4.Weldability,5.Anti-friction/lubrication properties,6.Physical characteristics like electrical or thermal conductivity, permeability or absorption properties7.Machining properties