To optimize the welded connection between chain link and flight we use a customized flash-butt welding machine with integrated deburring device according to DIN 44752. Flash-butt welding is a computer-aided welding procedure with parameter-logging. As impairment of the chain links, caused by irregular preheating that could lead to crack formation is precluded this is the technical optimal solution. This procedure creates a uniform material structure of the chain link and the welded flight. That way both parts form a single uniform unit. Additionally all weld seams are normalized after deburring.
Based on the specific requirements we also use autogenous welding or gas-shielded welding (e.g. MIG/MAG welding). As wear protection for operation in very abrasive environments we additionally use deposit welding for our chain links to ensure the longest possible service-life of the chain.