论文部分内容阅读
对工业生产的No.1微碳BH钢和No.2微碳BH钢热轧板、冷轧板和退火板的工艺和组织性能进行研究。结果表明,No.1和No.2微碳BH钢的γ织构组分在{111}<110>附近分别达到了最大值12.046和10.549。No.2微碳BH钢退火板平均晶粒尺寸均小于No.1微碳BH钢,细晶强化效果使得其强度略高。No.2微碳BH钢退火板铁素体晶界处和晶粒内均存在游离渗碳体,晶界处珠光体片层较少,No.1微碳BH钢退火板铁素体晶界处存在片层状珠光体和块状渗碳体,更多珠光体片层结构也使其强度较低。No.2微碳BH钢中较高含量P、Cr、Cu元素固溶在基体中引起固溶强化,碳氮化物析出的弥散强化作用,均弥补了C含量较低引起的强度下降。
The technological and microstructural properties of No.1 micro-carbon BH steel and No.2 micro-BH steel hot-rolled plate, cold-rolled plate and annealed plate were studied. The results show that the γ texture components of No.1 and No.2 micro-carbon BH steel reach the maximum of 12.046 and 10.549 near {111} <110>, respectively. The average grain size of No.2 micro-carbon BH steel annealed sheet is less than that of No.1 micro-carbon BH steel, and the fine grain strengthening effect makes its strength slightly higher. No.2 micro-BH steel annealed plate ferrite grain boundaries and grains are present within the free cementite, grain boundaries less pearlite sheet, No.1 micro-BH steel annealed plate ferrite grain boundaries There are lamellar pearlite and massive cementite, more pearlite lamellar structure also makes it less strength. In the No.2 micro-carbon BH steel, the higher content of P, Cr and Cu elements dissolved in the matrix caused the solid solution strengthening and the dispersion strengthening effect of carbonitride precipitation, which all made up for the decrease of the strength caused by the low C content.