【摘要】 利用拉伸试验机、金相显微镜、扫描电镜和透射电镜等检测工具,对LG610L钢板不同位置的试样进行检测分析,研究结果表明:LG610L钢表面处的组织晶粒比较细小,平均尺寸约为7μm,越靠近中心处晶粒尺寸越大,中心处的晶粒平均直径约为13μm.在横向的1/4处珠光体呈较明显的带状分布,而在表面和中心处带状组织不明显.拉伸断口为韧性断口,其中纤维区为典型的等轴韧窝,放射区多为撕裂韧窝或剪切韧窝,外缘区为涟波花样和无特征区域.析出物呈蚕豆状,其长度方向尺寸范围为15～30 nm,宽度方向尺寸范围为5～12 nm,且呈弥散分布,分布的形状呈"虚线"状.更多还原

【Abstract】 By means of tensile testing machine,metallographic microscope,scanning electron microscope and transmission electron microscope,the specimens of LG610 L steel plate in different positions are tested and analyzed.The results show that the grain size on the surface of LG610 L steel is smaller,and the average grain size is about 7 μm.The closer to the center,the larger the grain size is,and the average diameter of the grain at the center is about 13 μm.The banded distribution of pearlite in the transverse 1/4 is more obvious,but the banded tissue on the surface and the center is not obvious.The tensile fracture is a ductile fracture,in which the fiber region is a typical equiaxed dimple,the radiation zone is a tear dimple or shear dimple,and the outer edge is a ripple pattern and a non-characteristic area.The precipitates are in the shape of broad bean,the length direction size is between 15 nm and 30 nm and the width direction dimension is between 5 nm and 12 nm,and distributes diffusely,the shape of distribution is "dotted line" shape.更多还原