Circular hollow steel: D32.D38.D45.D51.D60.D70.D81.D92; hexagonal hollow steel: H22.H25.H28.H32.H35; Material: FF710.23CrNi3MoA.35SiMnMoV.55SiMnMo like. Geological pipe: Φ42.Φ50.Φ63.5.Φ73.Φ89 and supporting joint pipe material: R780.DZ50.DZ60.42CrMo etc. Shandong Peng Rui Drilling Technology Co., Ltd. was founded in 1992, is a design, development, production, sales and service as one of the professional manufacturer, the company's main products are: hexagonal hollow steel circular hollow steel, hydraulic drill rod materials, hollow bolt grouting materials, geological tube, tunnel drill, blast furnace brazing material opening hydraulic drill rod and finished brazing material, horizontal spiral drill pipe, drill pipe Teng Ma, Kilometers special drill rig, drill bolt, screw anchor drill pipe, drill pipe ribs, efficient spiral drill pipe, exploring water exploration gas drill pipe, drill pipe, geological diamond drill, various drill bits, mining tools and other equipment. first-class production equipment, strong technical force drilling hollow steel drill rod, my company is located in Shandong to land, There are a hundred years of history of coal production in Zibo, close to 205 National Road, location and convenient transportation. Mature manufacturing processes, advanced production and testing tools, is a reliable guarantee of product quality, after years of development, the company has products to diversify, series production, and established a strict procurement system, process control, storage and transportation, etc. scientific system to ensure to provide you with after sales service, new and old customers to return all the support and love. Business philosophy: the first service, the customer first, high quality and excellence. Carburizing methods are: gas carburizing, liquid carburizing, carburizing and special carburizing solid. Special carburization typically under specific physical conditions, find application at home and abroad at present are: a high-frequency electric field heating carburizing, vacuum carburizing under vacuum, plasma carburizing under ion bombardment conditions, the electrolysis discharge conditions electrolytic carburizing, carburizing fluidized bed particles flowing state like. The main features of the carburizing process is: carburizing and nitriding compared with infiltration speed, process time is short; although lower layer hardness, brittleness but small; the diffusion layer thickness, can withstand a greater compressive stress; layer hardness gradient is small, easy to produce peeling; hollow core part high strength steel, have a greater carrying capacity; low cost, economic advantages. Compared carburizing and carbonitriding, although slightly lower layer hardness hexagonal hollow steel, but much larger than the thickness of the diffusion layer carbonitriding layer (generally less than 0.8mm), thus representing carburizing layer carbonitriding layer higher load carrying and anti-extrusion capabilities. Carburizing and induction hardening strengthening, compared with a high surface hardness, good wear resistance; core part strength, high hardness, resistance to compression, flexural fatigue strength is good; not limited by the complexity of the shape of the workpiece and the batch size ; the workpiece processing performance and good uniformity. Other chemical heat diffusion layer, such as boriding vapor deposition of metal and TiC, TiN, with its depth of penetration is much thinner than the carburizing, the greater the concentration gradient, whether it is a major load bearing capacity, or resistance to brittle surface the ability to peel off layers are far and carburizing. Heavy Rod hollow steel, hollow steel, Shandong Drilling Co., Ltd. Peng Rui Peng Rui provided by Shandong Drilling Technology Limited. Drilling Ltd. Shandong Peng Rui (www.zbpengrui.com) strong, credible, Shandong Zibo metal cutting and other industries has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Drilling Ltd. Shandong Peng Rui and you hand into the brilliant, for a better future!