For Threaded Rod, only light Arbors Rod, Drill Rod, MF Rod Requires Blacksmithing, but just upsetting both ends (Drill and drill rod end MF Rod wrought only). Forged Threaded Rod must choose a large horizontal force upsetting upsetting machine. Forging heating, preferably frequency heating. Heating temperature control is very important, many low life or the life of the big reasons for fluctuations in the threaded drill rod, to a large extent by forging. Forging process, the operator often consciously or unconsciously some forging heating temperature, which can increase the high-temperature plasticity forgings, forging a more full of blanks, forging especially on small tonnage forging brazing machine, the heating temperature higher hollow steel forgings in most cases so hot even in over-burning state. Such shape forging process, although very good, but a "U-turn" phenomenon in the subsequent machining or handling. Because such tissue state after the process is difficult to eliminate, can not withstand the stress of high-frequency action fail prematurely. Threaded Rod after forging or hot forging state without hollow steel billet (ie threaded parts) to be annealed to eliminate forging heating or hot-rolled state organizations affected. Before machining, machining parts to partial softening annealing. Abroad using slit-type annealing furnace to complete the drilling hollow steel drill rods, most domestic manufacturers to adopt a box furnace annealing or IF. But IF annealing ineffective, often heated box furnace annealing segment is too long, too long, failed to carry out the heating portion of the final heat treatment and affect the life of the drill rod, and this problem has not been caused by the manufacturer's attention. After the material is selected, heat threaded drill rod and ensure that the key is to improve the life of the drill rod. A heat treatment process abroad most foreign 25CrNi3Mo steel threaded drill rod selection, the overall gas carburizing process. The process should have a big investment in deep gas carburizing furnace circular hollow steel, carburized layer thickness, surface carbon concentration, temperature carburizing, carburizing time, carburizing furnace atmosphere, cooling, etc., are available through computer control, so can guarantee to get a good quality and performance. After the whole carburizing, two thread re IF quenching and tempering heavy hollow steel drill rod to get the threaded part of the high wear resistance. Rod hardness is achieved by controlled cooling after carburizing overall. There are also some foreign manufacturers to choose low carbon CrNiMo Department of steel, quenched and tempered thread after two high-frequency quenching. Rod hardness is controlled at the time of the hollow steel rolling production to get the hardened layer thickness of the threaded portion of the general control of induction hardening 2.5 mm or less. Features abroad heat treatment process is: carburizing and induction hardening drill rod threaded surfaces can make to obtain high hardness and wear resistance, but also to obtain a high surface compressive stress. Surface compressive stress and lath martensite and austenite film-like structure within the slats can improve the surface fatigue strength, fatigue fracture threshold, reducing the fatigue crack propagation rate, which is to improve the life of the very thread Rod favorable. Hexagonal hollow steel, Shandong Peng Rui Drilling Ltd. (certified), hollow steel drill by Shandong Peng Rui Technology Limited. Drilling Ltd. Shandong Peng Rui (www.zbpengrui.com) Shandong Zibo, metal cutting class leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Shandong Peng Rui Drilling Ltd. led the staff warmly welcome all inquiries negotiations to create Shandong Peng Rui Drilling Ltd. a better future.