The main advantage of the 1045 cold drawn honed tubes in the process of its use is that the section reduction rate is large, especially the wall-reducing ability is strong. For carbon steel, the reduction rate of the section of the primary rolling can reach 80% to 83%, and the alloy steel can reach 72% to 75%. The main disadvantage is the difficulty of tool replacement. In addition to being directly used to produce a part of the high-precision cold-rolled pipe, the cold-rolling method is often used in combination with the cold drawing method for cold drawing. In this way, the wall-reducing ability of cold rolling can be fully utilized, and the advantages of easy replacement of the cold-drawn tool can be skillfully utilized, which is advantageous for improving productivity, expanding product production range, and improving the surface quality of the steel pipe.
At present, the cold-rolled pipe is produced by a multi-purpose cycle cold rolling pipe machine. The working characteristics of the periodic cold-rolled pipe mill are that the steel pipe and the mandrel are not moved. The reciprocating movement of the frame drives the reciprocating rolling steel pipe, and the variable-section hole-type compression rolling piece is used to achieve the purpose of reducing the diameter and reducing the wall.
Cold-rolling methods for steel pipes include cold rolling, cold drawing and spinning, mainly for the production of small diameter, precision, thin wall and high strength pipes. Cold-rolled steel tubes are widely used in national defense military, machinery, mining, chemical, electric power, agricultural machinery and other fields due to their smooth surface, good size, good performance, large cross-sectional shape and high metal utilization rate. The cold-rolled steel pipe process is developed on the basis of the cold drawn steel pipe process, which solves the problems of small deformation of the cold drawing, small number of passes, high metal consumption and poor deformation conditions.