Steel for heavy loading gear
A heavy-duty and gear technology, applied in the field of alloy steel, can solve the problems of micro-alloyed heavy-duty gear steel that have not been reported, and achieve the effects of easy processing, high impact energy, and reduced difficulty
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[0027] According to the above-designed chemical composition range, 9 furnaces (heat number 1-9) of the invention steel and 2 furnaces of comparative steel (heat number 10-11) were smelted on a 50kg induction furnace, in addition to 2 furnaces (heat number 12). -13) The specific chemical composition of commercial heavy-duty gear steel smelted by EAF+LF+VD is shown in Table 1. The molten steel is poured into ingots and forged into bars. The samples were normalized at 900℃ for 30 minutes before processing, and then processed into standard room temperature tensile samples (L 0 = 5d 0 , D 0 = 5mm, Charpy V-notch impact sample (10mm×10mm×55mm), blank of deformed sample and test sample (φ10mm×25mm). Tensile specimens and impact specimens were processed into final dimensions after heat preservation oil quenching at 860°C and tempering at 170°C for 4 hours, and corresponding tests were performed according to the national standard. The mechanical properties are shown in Tab...
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