应用余氏经验电子理论计算低合金钢C曲线的LPT值

Application of Yu′s Experience Electronic Theory of Solid and Molecule in Calculating LPT Value in C Curves of Low Alloy Steels

对各种合金奥氏体晶胞价电子结构进行比较后,认为影响合金奥氏体稳定性的主要因素是奥氏体晶胞价电子结构的强共价键。通过计算合金奥氏体晶胞强共价键电子能量Ee与45钢奥氏体晶胞强共价键电子能量Ee(45)的差,提出计算低合金钢C曲线的珠光体孕育时间对数值(LPT)公式。用该公式计算设计的中碳低合金耐磨钢,浇注最大壁厚120mm的铸件,空淬时可获得50HRC以上的硬度。

Through comparing the valence electron structure in austenitic crystal cell among all kinds of alloys, the strong covalent bond of austenitic crystal cell valence electron structure is thought as a main factor to influence the stability of austenite. After calculating the electron energy difference of strong covalent bond in austenitic crystal cell between alloy steel and 45 carbon steel, a formula to calculate LPT value in C Curve of low alloy steel was put forward. According to this formula, an anti-abrasive middle carbon low alloy steel was designed, and its quenched hardness of the casting with the maximum thickness of 120 mm cooled by air can be above 50 HRC.