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55DTi钢是低淬透性钢,55表示含碳量为0.55％,D表示低淬透性。这种新钢种完全立足国内资源,它与合金渗碳钢相比,成本低,性能好,不需要渗碳,这种新钢种的研制成功和推广使用,为发展我国农机工业提供了一定的有利条件。55DTi钢化学成分见表1,机械性能见表2。几年来,通过生产试用,初步认为55DTi钢有以下几个特点:1.齐齐哈尔钢厂在100吨碱性平炉共冶炼55DTi钢15炉,成材1050吨。冶炼和轧制工艺定型,生产稳定,冶金质量合格,钢材表面质量良好。钢的
55DTi steel is a low hardenability steel, 55 represents a carbon content of 0.55%, D represents a low hardenability. The new type of steel based on domestic resources completely, it is compared with the alloy carburizing steel, low cost, good performance, do not need carburizing, the successful development and promotion of the use of new steel for the development of China’s agricultural machinery industry has provided a certain Favorable conditions. 55DTi steel chemical composition shown in Table 1, mechanical properties in Table 2. Over the past few years, through the trial production, preliminary 55DTi steel that has the following characteristics: 1. Qiqihar Steel 100 tons of alkaline open hearth furnace smelting 55DTi 15 furnaces, finished 1050 tons. Smelting and rolling process stereotypes, stable production, qualified metallurgical quality, good surface quality of steel. Steel