The effects of sulfur content and calcium addition on smooth axisymmetric tensile fracture ductility of case hardening steel DIN 18CrNiMo7-6 have been investiga
1 Introduction There are numerous salt lakes in western China(Zheng Mianping,et al.,2011).Yiliping playa on the western Qaidam Basin is a magnesium sulfate subtype dry salt lake with high concentratio