Wear-resistant Heavy Plates In Tough Use

Machines in mining, transport, handling or disposal processes have to withstand the toughest working conditions and extreme loads caused by abrasion, erosion and corrosion. Unplanned downtimes due to wear-related damage have a lasting impact on productivity and efficiency.

In order to increase the performance and service life of highly stressed devices such as dump trucks, excavator buckets, polyp grabs or rock buckets, leading construction machine manufacturers and suppliers worldwide rely on wear-resistant Dillidur brand steel from Dillinger Hüttenwerke. With a consistent surface hardness of up to 550 Brinell hardness HBW, according to Michael Feldhoff, customer consultant at Ancofer Stahlhandel, which belongs to the Dillinger Group, it lasts three times or even longer than normal structural steel, depending on the application and Dillidur grade. Thanks to its exceptional hardness and strength, Dillidur enables lighter constructions with less material and higher payloads.The decisive factor for the efficiency of the heavy plates up to 150 mm thick and 4500 mm wide is the combination of good cutting and welding properties with formability in Dillidur 400. Despite comparatively low preheating temperatures, high crack resistance is guaranteed. The basis of this special performance of Dillidur is the technology of its production from casting to quenching. Rolling forces of 108,000 kN (around 11,000 t) lead to very high reductions in the thickness of the slabs, which are up to 450 mm thick, which are rolled down to sheet metal dimensions. This strong deformation is the reason for the excellent homogeneity in the critical sheet metal core.The basis of this special performance of Dillidur is the technology of its production from casting to quenching. Rolling forces of 108,000 kN (around 11,000 t) lead to very high reductions in the thickness of the slabs, which are up to 450 mm thick, which are rolled down to sheet metal dimensions. This strong deformation is the reason for the excellent homogeneity in the critical sheet metal core.The basis of this special performance of Dillidur is the technology of its production from casting to quenching. Rolling forces of 108,000 kN (around 11,000 t) lead to very high reductions in the thickness of the slabs, which are up to 450 mm thick, which are rolled down to sheet metal dimensions. This strong deformation is the reason for the excellent homogeneity in the critical sheet metal core.

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In addition to sales and rental, Schlüter Baumaschinen also offers the individual production of attachments. For example, for a Komatsu PC800 excavator weighing 80 t, Schlüter is producing a rock buckets weighing 5.2 t. At the front he receives shrouds as impact protection and corner shrouds for armor. Side parts and side cutting edge are made from Dillidur 400 in order to withstand wear from hard stone for longer. The face of the side cutting edge is additionally reinforced with armor plate strips made of a steel composite.

Contrary to common practice, Schlüter does not manufacture the back trough from two 15 mm thick sheets welded together with an additional impact protection strip, but instead directly relies on 30 mm thick Dillidur 400. A special machine can individually bend this 3 t heavy plate over the entire length of 2 m. The shape of the opening and closing angles is designed precisely for ball operation in order to permanently strengthen the rear wall for its enormous stress when the 9 t ball is received. At the customer's request, a particularly stressed area is additionally armored with a 15 mm thick impact protection strip. Schlüter also replaces the standard tooth system supplied with the machine for a system that the customer uses for his entire fleet.Since the machine manufacturer does not offer this system, Schlüter modifies the bucket accordingly. It takes around three weeks from receipt of the order, creation of the parts list and material request to delivery of the required parts. (qui)

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