When precision bright solid tube inspect removal of surface defects,it is cut into desired length, end to end in the perforated tube surface-centering, and then sent to the furnace heating, punch a hole. In the hole while continuing to rotate and move forward in the roll and the role of the head, gradually formed within the tube cavity, called the capillary. And then sent to the automatic rolling machine to continue rolling. Finally after all the whole entire wall thickness are, after sizing mill sizing, to specifications. Use of continuous pipe mill producing hot-rolled precision light pipe is a more advanced methods. If you wish to get smaller and better quality seamless, must be rolled, drawn or a combination of methods. Cold is usually performed on two-roll mill, pipe hole in the variable section tapered slot and does not move the head of the circular hole formed in the rolling. Drawing is usually 0.5 ~ 100T single chain or double chain drawing machine on. Heating tube extrusion method is about good squeeze on the closed cylinder, perforated extruded rod rod and move together, so that extrusion from the smaller hole in the extrusion die. This method can produce smaller diameter of the pipe. After coating the coating material on the precision light pipe ri pretreatment indirectly affect the quality of the coating off the power attached to compete.
Titanium solid solution strengthening effect is strong, but the toughness of reducing solid solution, solid solution in austenite to improve the hardenability of steel, but titanium compounds, but lower hardenability of steel. Improve the tempering stability, and a secondary hardening effect in enhancing the oxidation resistance and heat resistant steel heat resistance, such as creep and rupture strength, and improve the weldability of steel. Precision light pipe welding temperature is mainly affected by the impact of high-frequency eddy current heating power, high-frequency eddy current frequency heating power is mainly affected by the impact of thermal power and eddy current excitation frequency is proportional to the square; while current excitation frequency but also by the excitation voltage, current, and capacitance, inductance. Use of this technology and the production of hot-rolled steel welded pipe common essential difference between the high-frequency furnace heating the weld through the parent microstructure and mechanical properties can be achieved entirely consistent Additionally, multiple passes through the tension -reducing rolling machines and automatic control makes precision light pipe size accuracy ( especially tube roundness and wall thickness accuracy ) than similar. Produced in the developed world, fluid pipes, boiler tubes have been widely used pipe seamless process, with the development of society, domestic hot-rolled precision light pipe welded to gradually replace the situation has been formed.
