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钢中加入微量的硼(0.0005—0.005%)能显著增加钢的淬透性.因此,可以认为,硼能够作为贵重合金的代用品,例如:镍、铬和钼,而降低合金钢的生产成本.本题研究的目的是要找出18ХГТ钢的代用品,减少铬合金的消耗。将渗碳后的硼钢及18ХГТ钢作淬透性及心部机械性能的比较,选出一种可以代替18ХГТ钢的渗碳级硼钢,其中合金含量,铬少于0.30%,钢少于0.15%,镍少于0.30%.硼的硬化因子随着碳分的增加而减低。在本题的研究中得出,碳分与硼的硬化因子之间的直线关系为
Addition of a trace amount of boron (0.0005-0.005%) to the steel significantly increases the hardenability of the steel, so boron can be considered as a substitute for noble alloys such as nickel, chromium and molybdenum while reducing the production cost of the alloy steel The purpose of this study is to find substitutes for 18ХГТ steel to reduce the consumption of chromium alloy. The carburized boron steel and 18ХГТ steel for hardenability and mechanical properties of the heart of the comparison, select a can replace 18ХГТ steel carburizing grade boron steel, wherein the alloy content, less than 0.30% chromium, steel less than 0.15% and less than 0.30% nickel. The hardening factor of boron decreases with the increase of carbon content. In this study, it is concluded that there is a linear relationship between the carbon fraction and the hardening factor of boron