Today, the cold-drawn seamless steel pipe manufacturer talks about how to solve the problem of cracking when cold-drawn seamless steel pipe bending occurs: Recently, an old customer and I asked me for advice when inquiring about the problem of pipe bending. He responded that a group of cold-drawn seamless steel pipes were broken when they were taken back to make 90-degree bends, and asked if this would happen when our pipes were made bends. 我当时就想要么是客户弯管时操作方法不当要么就是冷拔无缝钢管出现了问题。我把他弯断的管子拿了两段到我们公司化验检测。发现几个问题：第一，管子的硬度太高，含锰元素和碳元素过高，导致管子脆性较高。第二:冷拔无缝钢管的焊缝是在外面的，第三：冷拔无缝钢管的拉伸性较低。这下原因找到了问题就出现在冷拔无缝钢管上面。后来我电话联系客户说了原因然后提了几点解决方法：第一：买冷拔无缝钢管时要符合国家标准的304冷拔冷拔无缝钢管，第二：买货时候要说明是做弯管用的供应商就会注意；要求冷拔钢管在管子内表面这样导致弯管断裂的情况会降低，第三：冷拔无缝钢管的拉伸性能要高，满足对拉伸、弯曲等加工的严格要求,第四：冷拔无缝钢管加工弯管的话建议最好买冷拔工艺的，冷轧冷拔无缝钢管加工弯管危险性比较高，第五：弯管加工时候冷弯出现断裂时候我么可以改成热弯加工工艺。
At that time, I wanted to either the customer bending the pipe improperly or cold-drawn seamless steel pipe problems. I took two sections of his broken pipe to our company for testing. Several problems have been found. First, the high hardness of the pipe and the high content of manganese and carbon lead to the high brittleness of the pipe. Second, the weld of cold-drawn seamless steel pipe is outside. Third, the tensile strength of cold-drawn seamless steel pipe is low. The problem was found on the cold-drawn seamless steel tube. Later, I contacted customers by telephone to explain the reasons and put forward several solutions: first, when buying cold-drawn seamless steel tubes, 304 cold-drawn seamless steel tubes that meet the national standards should be met; second, when purchasing goods, the suppliers who are making bends should pay attention to it; requiring welded pipes to break on the inner surface of the tubes will reduce; third, the tensile properties of cold-drawn seamless steel tubes should be improved. Fourth, cold-drawn seamless steel pipe bending process is recommended to buy cold-drawn process, cold-rolled seamless pipe bending process is more dangerous. Fifth, when cold-formed pipe breaks, we can change to hot-bending process.
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