Marine Long Shaft

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Manufacture various specifications of large precision forgings We have two thousand and five hundred-tons hydraulic press and fifteen-tons operation machine, moreover, with various kinds of supporting heat-treatment facilities such as heating furrnace, annealing furnace, sawing machine, etc.. We mainly produce all kinds of open forging with weight below ten tons. Our product line adopt standard with ASME, DIN, GB, EN etc.. The material contain various kinds of high quality carbon steel, alloy steel, tool steel, bearing steel, etc.. The open forging mainly contain shaft series, such as the main shaft, transmission shaft, gear shaft, marine shaft, motor shaft, support roll, working roll, transfer roll, various columns of hydraulic press, meanwhile,we produce various kinds of ring, bread and hot forging module. We adopt the advance production process that contains "high-power electric furnace+ladle furnace(LF)+vacuum degassing(VD)+electroslag remelting+fast forging+annealing( normalizing)+heat-treatment+machining". Main specification as follows: Name Size(mm) material remark shaft diameter≤1500 length≤12000 as clients' request various stepped shaft, slender shaft, long metallurgy shaft, screw rod hot forging module 80-1000 as clients' request various module Pipe series diameter≤1500 length≤12000 as clients' request various thick wall hollow pipe, high pressure boiler pipe Performance: Grain Size: ASTM E－112　5－8 rank. Forging ratio (become steel ingot into forging blank): ≥3 Supersonic flaw detecting: SEP1921 the third group C/C Machining technology parameters: Size(OD mm) Surface roughness Precision(mm) Coaxial tolerance(mm) φ100～φ1500 1.6 0.1 0.08

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Zhengzhou Chenghe Machinery Co.Ltd

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