The processing methods of large and small heads are basically based on pressing

The processing method of large and small heads is basically based on pressing, but the pressing process will make the hardness and density of the steel larger, but if it is not heated, it will easily produce cracks. Processing method of large and small heads: control of variable diameter range, under normal circumstances, the processing range of large and small heads is within one level, for example, the large and small heads of 325-159, basically need to undergo several heat treatments, the first choice is 325 The tube is cut to a suitable length, and then the caliber of 325 is pressed into 273. This pressing also needs to be heated, and the second diameter change is the process of 273 to 219. This time it is also necessary to heat the tube to the specified Temperature and then pressed.

The final step is the process of changing 219 to 159, and each diameter change requires heat treatment. Processing method of large and small heads: Each material has its own hardness and tensile strength, so the pressing force of each material is also different. The size and size of the same model are different, and the processing methods and procedures will be very different. For example, the size of ordinary carbon steel will be formed after 3 heat treatments. However, for the size of alloy material, the greater the hardness, the number of times of pressing and heating The more the number of times, the more complicated the molding process.