The spiral pipe production process to control the quality of it is very important to the blank material abnormal perforations vary based on the temperature difference. Thermal expansion pipe but mostly in about 1200 ℃, carbon and other alloying elements to be slightly lower when the temperature is higher. Heating operation is the second key is to try to cut the number of oxide. Especially in hot kneading elbow, spiral steel pipe from stuff life expectancy and kneading surface quality of pipe left, pleading even more severe.
The spiral pipe production process, because the primary processing is carried out in a hot state, the heating operation is very important for the resolution process of the quality of products. Such as heat with the stove, according to their effect, divided into two kinds of furnaces and reheating; former for the fabric is heated from room temperature to the processing temperature; which is used during the processing of billets reheated to the required processing temperature. Heating wrong will become perhaps the inner surface of the tube outer surface showing cracks, folds and migraine pain and other scrap the reason. There are many ways the furnace, but the primary use of the annular furnace. This has an annular hearth furnace, which can slowly shift along the bottom of the blank from the entrance into the radial direction, reverse one can be used at the outlet of the heating and soaking temperature to the rules one kind of stove. This heating operation is the key to uniformly heat the billet to a temperature suitable for processing. Since a great impact on the quality piercing, that is, perforation processing temperatures are important condition affecting the quality, it is generally to processing of piercing the billet temperature control.
No comments:
Post a Comment