Datong Hydraulic

  CK45 /AISI 1045 steel  shows reasonable strength and toughness. AISI 1045 will through harden to 2.5” (63mm) with a tensile strength of 66-120 Ksi (620-850 MPa) . This grade of steel is used for axles, bolts, forged connecting rods, crankshafts, torsion bars, light gears, guide rods etc . HEAT TREATMENT OF AISI 1045 (CK45)  AISI1045 (CK45)  Annealing Full annealing of small C1045 forgings is carried out from 1450-1600ºF (790-870ºC) followed by furnace cooling at 50ºF (28ºC) per hour, to 1200ºF (650ºC) soaking and air cooling. AISI 1045 (CK45)  Hardening Hardening of this grade is carried out from an austenitizing temperature of 1475-1550ºF (800-845ºC) and oil or water quenching. Flame and induction hardening may be carried out by heating quickly to the desired case depth and quenching in water or oil. This should be followed by a  tempering  treatment at 300-400ºF (150-200ºC) to reduce stresses in the case without affecting its hardness. A surface ha...

  High precision cold drawn tube  surface roughness Ra ≤ 0.8μm, diameter size accuracy can reach H9 ~ H10, only to ensure that after honing to H7 ~ H8 bore size and Ra ≤ 0.2μm of the internal surface roughness requirements. In addition to the honing machine equipment precision, the cold drawn tube surface quality is another key point, cold drawn tube internal surface defects by the domestic A factory measured data classification, there are three kinds of main  honing pipe  surface roughness. 1. Pitting: After rough drawing, the surface can be found by many pits-like defects, such defects will not seriously affect the smoothness of the cylinder bore, for the cylinder is a waste. 2. Scratch: Scratch defects are cold drawn, generally along the axis of a steel pipe along the direction of the scratches, there must be more than the depth of the scratches honing margin, it is possible to grind away such defects, processing a qualified  cylinder . 3. Not round: Cold dra...

  Cold drawing (rolling) steel tube: round pipe blank → heating → piercing → heading → annealing → pickling → oiling (copper plating) → multi-pass cold drawing (cold rolling) → blank pipe → heat treatment → straightening → hydrostatic test (flaw detection) → marking → warehousing. What is a  cold drawing steel tube ? Hot-rolled steel pipe is made of continuous casting slab or initial rolling slab as raw material, which is heated by walking-beam heating furnace, descaled by high-pressure water, and then entered into roughing mill. The roughed material is cut into head and tail, then entered into finishing mill, and then rolled by computer control. After final rolling, it is cooled by laminar flow and coiled by coiler to become straight hair coil. The head and tail of straight hair curls are often tongue-shaped and fishtail-shaped, and the accuracy of thickness and width is poor. The edges often have defects such as wave shape, folded edge and tower shape. OUR HOT PRODUCTS: Skiv...

   Ck45  seamless steel tube  is usually used to produce honed tubes.CK45 is high quality carbon structural steel, carbon content is 0.42-0.50%, with 610 Mpa tensile strength , and yield point  is 360 Mpa;This material is also more common than other superior carbon steels. Steel 45: average carbon content is 0.42-0.50%, average silicon content is 0.17-0.37%, average manganese content is 0.50-0.80%, average sulfur content is <= 0.035%, average phosphorus content is <= 0.035 %, The average chromium content is <= 0.25%, the average nickel content is <= 0.2545, and the carbon content of steel is about 0.45%. Recommended heat treatment temperature Tensile strength: not less than 600Mpa; Yield strength: not less than 355Mpa; Elongation: 10%; Shrinkage: 40%; Impact energy: 39J; Steel delivery state hardness: not greater than unheated: 229HBS; annealed steel: 197HBS; Datong is a professional manufacturer in CK45 seamless steel tube,we also supply chrome plat...