Steel plate spring material for automobile and heat treatment technology of steel plate spring material

• Main Authors: JIANG LUJUN, QU HAIJIN, GUO CHAOYANG, ZHANG YU, GAO LIANGQING
• Format: Patent
• Language: Chinese; English
• Published: 15.06.2018
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

A steel plate spring material for an automobile comprises components including, by mass percent, 0.47%-0.57% of C, 0.10%-0.40% of Si, 0.70%-1.20% of Mn, 0.80%-1.20% of Cr, 0.010%-0.030% of Ti, 0.010%-0.035% of Al, 0.005%-0.009% of N, 0.0005%-0.004% of B, smaller than or equal to 0.025% of P, smaller than or equal to 0.025% of S and the balance Fe and inevitable impurities. According to the material heat treatment technology, the material is subjected to quenching treatment at the temperature ranging from 820 DEG C to 920 DEG C, and tempering treatment is conducted at the temperature ranging from 400 DEG C to 510 DEG C. The steel plate spring material has excellent tempering stability and toughness, and the requirement of the material heat treatment technology can be lowered. 种汽车用钢板弹簧材料，其成分及质量百分比含量为C 0.47%～0.57%、Si 0.10%～0.40%、Mn 0.70%～1.20%、Cr 0.80%～1.20%、Ti 0.010%～0.030%、Al 0.010%～0.035%、N 0.005%～0.009%、B 0.0005%～0.004%、P≤0.025%、S≤0.025%，其余为Fe和不可避免的杂质，该材料的热处理工艺为：先于820～920℃下对其进行淬火处理，然后在400～510℃下进行回火处理即可。本发明不仅