Rod raw material after many years of research and development trials. Has been recognized by the majority of users, mainly for processing heavy drill rod, hydraulic drill rod, threaded hole solder, brazing furnace openings, pneumatic drill rod, drill rod hexagonal, round Rod Our company can according to customers demand customized materials Rod! Rod raw material after many years of research and development trials. Has been recognized by the majority of users, mainly for processing heavy drill rod, hydraulic drill rod, threaded hole solder, brazing furnace openings, pneumatic drill rod, drill rod hexagonal, round Rod Our company can according to customers demand customized materials Rod! Rod raw material after many years of research and development trials. Has been recognized by the majority of users, mainly for processing heavy drill rod, hydraulic drill rod, threaded hole solder, brazing furnace openings, pneumatic drill rod, drill rod hexagonal, round Rod Our company can according to customers demand customized materials Rod! Rod raw material after many years of research and development trials. Has been recognized by the majority of users rock drill rod, drill rod is mainly used for processing heavy, hydraulic drill rod, threaded hole solder, brazing furnace openings, pneumatic drill rod, drill rod hexagonal, round Rod Our company After the material can be selected, heat threaded drill rod and ensure that the key is to improve the life of the drill rod according to customers demand customized materials 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, its carburizing layer thickness, surface carbon concentration, temperature carburizing, carburizing time, carburizing furnace atmosphere, cooling, etc., can be controlled through the computer drilling hollow steel drill rod, so can guarantee to get a good quality and performance. After the whole carburizing, two thread re IF quenching and tempering of steel hollow, threaded parts for 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 heavy drill rod hollow steel, 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. Circular hollow steel | Heavy Rod (certified) | hollow steel provided by Zibo Peng Rui Metal Products Limited. Zibo Peng Rui Metal Products Co., Ltd. (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. Zibo Peng Rui Metal Products Co. led the staff warmly welcome all inquiries negotiations to create Zibo Peng Rui Metal Products Co. a better future.