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采用不同工艺对含铝轻型钢结构材料进行了热处理,并进行了显微组织、力学性能和耐腐蚀性能的测试与对比分析。结果表明,分级退火、分级淬火或二次变温回火,有利于细化含铝轻型钢结构材料的内部组织,提高其力学性能和耐腐蚀性能。在其它热处理工艺相同的情况下,分级退火较常规退火、分级淬火较常规淬火和二次变温回火较常规回火,其抗拉强度分别增加39、16和27 MPa,伸长率分别增加0.9%、1.9%和4.8%,0℃冲击吸收功分别增加4.4、4.5和9.2 J,腐蚀电位分别正移160、120和170 mV。
Different processes were used to heat treat aluminum-containing lightweight steel structure materials, and the microstructure, mechanical properties and corrosion resistance were tested and compared. The results show that the fractional annealing, fractional quenching or secondary tempering is conducive to the refinement of the internal structure of aluminum-containing lightweight steel structure materials to improve its mechanical properties and corrosion resistance. In the case of other heat treatment under the same circumstances, the conventional annealing step annealing, quenching and tempering than conventional quenching conventional tempering, the tensile strength increased by 39,16 and 27 MPa, the elongation increased by 0.9 %, 1.9% and 4.8% respectively. The impact absorption energy at 0 ℃ increased by 4.4, 4.5 and 9.2 J, respectively, and the corrosion potentials shifted 160, 120 and 170 mV respectively.