例一、35CrMo钢热轧管破断实质概况φ340×27mm35CrMo钢的一支热轧无缝钢管在检查时偶然从检查台上跌落地面发生了严重的脆性破断。破断后的实物照片见图1和图2。从图中可看出如下几个特点: 1.破断处出现严重的分层断口(图2)。这是分层开裂的特征,近内壁分层比近外壁处更加严重; Example 1, 35CrMo steel hot-rolled tube rupture substantial overview A hot-rolled seamless steel tube of φ340 × 27mm35CrMo steel in the inspection occasionally dropped from the test bench on the ground a serious brittle fracture. Broken physical photos shown in Figure 1 and Figure 2. The following features can be seen from the figure: 1. Broken at a serious stratified fracture (Figure 2). This is a feature of delamination, which is more severe near the inner wall than near the outer wall.