综述了国内外非调质钢的应用现状及发展趋势。探讨了非调质钢的强韧化机理及手段，并从非调质钢强化方程、微合金元素固溶度积方程、晶内铁素体强化、控轧-控冷技术等方面阐述了非调质钢强韧化的研究动向。列举了各类非调质钢的典型应用，分析了非调质钢在我国生产及应用中的问题，并给出扩大非调质钢生产应用的建议。

The resent application and progress of non- quenched and tempered steel is reviewed. The mechanism of strength and toughness and the method to improve them are discussed. Some new research processes are presented，which include strengthening equation，solid solubility product equation of micro alloying elements，strengthening by intragranular ferrite （IGF），controlled rolling and cooling technology of non-quenched and tempered steel. The typical applications of various non-quenched and tempered steels in automotive industry are 1isted. The problems for the production and application of non-quenched and tempered steel in China are also analyzed. Some suggestions for enlarging future manufacture and applications in automotive industry are also put forward.