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随着我国工农业生产的发展,普通低合金钢得到了愈来愈广泛的应用。我厂生产的高效率4—73型离心通风机叶轮,就是采用了16锰钢。文化大革命前,一直使用低氢型碱性焊条焊接风机转子。在这次无产阶级文化大革命运动中,工人师傅高举毛泽东思想伟大红旗,自力更生,奋发图强,大搞群众运动,决心用酸性焊条代替碱性焊条并为了检验酸性焊条焊接鼓风机叶轮的可靠性,对其进行了超转试验。焊条为结502,直径为4毫米,电压为32～36伏,电流为180～250安,接头型式为角焊缝,焊角为4毫米。叶轮外径1010毫米,叶片数量12个(见图1、2),工作转速为1460转/分,试验转速为1670转/分(超速15%),园周速度为80米/秒,超速试验时间连续202小时,转行达两
With the development of our country’s industrial and agricultural production, ordinary low-alloy steel has been more and more widely used. I plant the production of high efficiency 4-73 centrifugal fan impeller, is the use of 16 manganese steel. Before the Cultural Revolution, the use of low-hydrogen alkaline welding electrode rotor fan. During this proletarian Cultural Revolution movement, workers’ workers held high the great red banner of Mao Zedong Thought, made every effort to achieve self-reliance, work hard for the masses and vigorously promote the mass movement. They decided to use acidic welding rods instead of alkaline welding rods and tested the reliability of the acidic welding rod blowers impellers Over-rotation test. The electrode is a knot 502, a diameter of 4 mm, a voltage of 32-36 volts, a current of 180-250 amps, a fillet weld joint type, a weld angle of 4 mm. Impeller diameter of 1010 mm, the number of leaves 12 (see Figure 1,2), the working speed of 1460 rev / min, the test speed of 1670 rev / min (speeding 15%), Park circumference of 80 m / Time for 202 hours, switch to two