在机械制造行业还有其他的机械行业当中都有应用这款产品，通过了不同形状的模具制造出了很多不同截面形状以及不同大小规格的产品，形状规格的多样化让它在应用时涉及了较为广泛的优先域。先进的冷拉工艺可以让产品的表面变得光滑明亮，而材料也可以节省很多。
方管表面热处理是为改变精拉异型方钢表面的组织和性能，仅对其表面进行热处理的工艺。其中表面淬火是常用的表面热处理方法。异型方钢表面淬火是指仅对工件表层进行淬火的工艺。
其目的是使工件表面获得高硬度和高耐磨性，而心部保持较好的塑性和韧性，以提高其在扭转、弯曲、应力或在摩擦、冲击、接触应力等工作条件下的使用寿命。
方管表面淬火不改变工件表面化学成分，而是采用快速加热方式，使工件表层迅速奥氏体化，使心部仍处于临界点以下，并随之悴火，从而使精拉异型方钢表面硬化。按加热方法的不同，表面淬火方法主要有感应淬火、火焰悴火和接触电阻加热淬火等。目前生产中应用多的是感应悴火。
在方管进行变形矫正的时候，必须要先矫正角度的变形，之后再将弯曲变形的地方矫正直。矫正变形的家导读可以先做成九十度角形凹凸模具，然后用机械压顶法来矫正，有部分角度的局部会变形，可以以矫直一起操作，而当角度大了就用锤子击打让它的角度变成九十度，角度小了的话就用角度锤或者是手锤放在里面把角度扩开，达到九十度。而弯曲的变形就需要放在矫架上面然后根据长度来进行捶打，要求就是要又准又稳。
It is used in the machine building industry and other machine industries, where products with different cross-section shapes and sizes are made by means of moulds of different shapes, the variety of shapes and sizes allows it to be used in a wide range of fields. Advanced cold drawing technology can make the surface of the product become smooth and bright, and the material can be saved a lot. The surface heat treatment of square steel tube is a process which only heat-treated the surface of square steel in order to change its microstructure and properties. Among them, surface quenching is a common method of surface heat treatment. Surface hardening of special-shaped square steel is the process of quenching only the surface layer of the workpiece. The aim is to obtain high hardness and wear resistance on the surface of the workpiece, while the center part maintains good plasticity and toughness, in order to increase its torsion, bending, stress or in friction, impact, contact stress and other working conditions under the service life. The surface quenching of square pipe does not change the chemical composition of the surface of the work piece, but adopts the rapid heating method, which makes the surface layer of the work piece rapidly austenitizing, and makes the center part still under the critical point, and then the surface of the square steel is hardened. According to the different heating methods, the surface hardening methods mainly include induction hardening, flame hardening and contact resistance hardening. At present, there are many applications in the production of inductive fire. When the square tube is deformed, it must first correct the angular deformation, and then straighten out the area of the bending deformation. The home guide to correct the deformation can be made into a 90-degree angle concave-convex die first, and then it can be corrected by the mechanical pressing method. Some parts of the angles will deform and can be straightened together, when the angle is large, hit it with a hammer to make the angle 90 degrees. If the angle is small, use an angle hammer or a hand hammer to expand the angle to 90 degrees. The bending of the deformation needs to be placed on the top of the brackets and then according to the length to beat, is required to be accurate and stable.
