【摘要】 主要从淬透性和力学性能两方面阐述了硼钢热处理的要点。着重指出了本文所提出的晶界硼浓度,点阵硼浓度和晶粒尺寸间的关系式在热处理中的指导作用。阐述了较高含硼量钢因热加工而丧失淬透性,并因析出网状硼相而变脆时,恢复淬透性和韧性的原则和方法。硼淬透效果的恰当判据是淬透系数F_B。本文还讨论了合金元素对硼淬透效果影响的经验关系式。淬火低、中温回火状态硼钢的性能最为优异,这是应当充分利用的。我国硼钢的质量目前有了很大的提高;热处理原理的研究也有长足的进展,这就为硼钢的广泛推广使用提供了条件。更多还原

【Abstract】 The keys of heat treating boron steel have been dealt with mainly basedon the hardenability and mechanical properties. The formula of relationshipconcerning the grain boundary boron concentration, the lattice boronconcentration and grain size established by the author is of guiding significancein heat treatment. The principle and method of restoring the hardenability andtoughness of the boron steel have been pointed out for the steel of higher boroncontent, which loses hardenability due to its hotworking history and becomesbrittle because of the separation of the net--type boron phase. The propercriterion for the effect of boron on hardenability is hardenability factor F_B.The emperic for mula of alloying elements on the influence of boronhardenability has been discussed. The properties of boron steel tempered atlow and medium temperature after hardening are excellant, which should befully utilized. The quality of the boron steel produced in China has so farbeen greatly improved and much progress in the study of its heat treatmentprinciple has been made, thus the good condition has been created for theextensive application of boron steel.更多还原