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为了解决运输与建筑机械中的螺旋伞齿轮生产问题,我站在成都工学院和四川省机械工业局研究设计院的协助下,进行了高强度球铁直接精铸试验。在造型、冶炼、加工等方面,现已掌握一些规律,成品逐步稳定。解放车路试,截至本报告时,38号载重车已行驶27971公里,7号自卸车已行驶16283公里,均无异常现象。所试验的球铁,抗拉强度可稳定在100公斤/毫米~2以上,冲击韧性在4～5公斤·米/厘米~2以上,均接近18铬锰钛钢的指标,只是疲劳强度差些。但据研究,钒系高强度球铁的疲劳强度亦已接近40公斤/毫米~2。作为齿轮材料,高强度球墨铸铁具备钢材所没有的性能,其中较突出的是易磨合性,高的抗压比
In order to solve the problem of spiral bevel gear production in transportation and construction machinery, I conducted the direct casting test of high strength ductile iron with the help of Chengdu Institute of Technology and Sichuan Provincial Bureau of Machinery Industry Research and Design Institute. In the modeling, smelting, processing, etc., now has some rules, the finished product gradually stabilized. Jiefang road test, as of this report, the 38th truck has been driving 27,771 kilometers, 7 Dump Truck has been traveling 16,283 kilometers, no abnormalities. The test ductile iron, the tensile strength can be stabilized at 100 kg / mm ~ 2 above, the impact toughness of 4 ~ 5 kg · m / cm ~ 2, are close to 18 Cr, Mn and Ti indicators, but less fatigue strength . However, according to the study, the fatigue strength of vanadium-based high-strength ductile iron has also been close to 40 kg / mm ~ 2. As a gear material, high-strength ductile iron has the properties of steel, which is more prominent is easy to wear together, high compression ratio