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通过控轧控冷试验,研究了不同工艺参数对ML15钢力学性能的影响。结果表明,由于应变诱导铁素体相变,铁素体晶粒细化,低温轧制较常规轧制后快速冷却可以获得更好的综合力学性能;常规轧制后快速冷却要优于低温轧制后慢冷试样的力学性能;终冷温度越低,珠光体片间距越细,强度和塑性越好;低碳铆螺钢采用控轧控冷不经热处理抗拉强度达到490 MPa级别,其力学性能远优于常规轧制后不控冷的同样试样。
The effect of different process parameters on the mechanical properties of ML15 steel was studied by controlled rolling and controlled cooling. The results show that due to the strain-induced ferrite transformation, ferrite grain refinement, low-temperature rolling rapid cooling after conventional rolling can get better mechanical properties; rapid cooling after conventional rolling is better than low-temperature rolling The mechanical properties of the slow-cooled specimens after the system is made; the lower the final cooling temperature, the finer the pearlite pieces, the better the strength and plasticity; the low-carbon riveted steel adopts controlled rolling and controlled cooling without heat treatment to achieve a tensile strength of 490 MPa, Its mechanical properties are much better than those of the same samples that are uncontrolled after conventional rolling.