40Cr steel plate can be cut retail: 134-5509-0868, 40Cr steel plate is the standard steel number of GB in China, 40Cr steel plate is one of the most widely used steel in the machinery manufacturing industry. It has good comprehensive mechanical properties, good low temperature impact toughness and low notch property after tempering treatment. Steel hardenability is good, water quenching can be quenched to 28 ~ 60mm, oil quenching can be quenched to 15 ~ 40mm. In addition to tempering treatment, this steel is also suitable for high-frequency quenching treatment. When the hardness is 174 ~ 229HB, the relative machinability is 60%. The steel is suitable for making medium plastic molds.
40Cr steel plate common specification table
40Cr 3*1500-4020*6000
40Cr 4*1500-4020*6000
40Cr 5*1500-4020*6000
40Cr 6*1500-4020*6000
40Cr 8*1500-4020*6000
40Cr 15*1500-4020*6000
40Cr 20*1500-4020*6000*10000
40Cr 25*1500-4020*6000*10000
40Cr 30*1500-4020*6000*10000
40Cr 35*1500-4020*6000*10000
40Cr 40*1500-4020*6000*10000
40Cr 50*1500-4020*6000*10000
40Cr steel plate characteristics
40Cr steel plate price is moderate, easy to process, after appropriate heat treatment can obtain a certain toughness, plasticity and wear resistance. Normalizing can promote spheroidization of tissue and improve cutting performance of blanks with hardness less than 160HBS. Tempered at a temperature of 550~570℃, the steel has comprehensive mechanical properties. The hardenability of the steel is higher than that of 45 steel, which is suitable for high-frequency quenching, flame quenching and other surface hardening treatment.
40Cr steel plate use
40Cr steel plate after tempering is used to manufacture mechanical parts that bear medium load and medium speed work, such as steering knuckle, rear shaft of automobile and gear, shaft, worm, spline shaft, sleeve, etc. After quenching and medium temperature tempering, it is used to manufacture parts that withstand high load, impact and medium speed work, such as gears, spindles, oil pump rotors, sliders, sleeve rings, etc. After quenching and low temperature tempering, it is used to manufacture parts with heavy load, low impact and wear resistance, and the solid thickness of the section is less than 25mm, such as worm, spindle, shaft, sleeve ring, etc. After tempering and high-frequency surface quenching, it is used to manufacture parts with high surface hardness and wear resistance without great impact, such as gear, sleeve, shaft, spindle, crankshaft, mandrel, dowel, connecting rod, screw, nut, intake valve, etc. In addition, this steel is suitable for the manufacture of carbonitriding treatment of various transmission parts, such as large diameter and low temperature toughness good gear and shaft.
40Cr steel plate welding process points:
1, generally in the annealing (normalizing) state of welding.
2, the welding method is not limited
3, with a larger line energy, appropriately increase the preheating temperature, the general preheating temperature and interlayer temperature can be controlled between 250 and 300℃.
4, the welding material should ensure that the composition of the deposited metal is basically the same as the base material, such as J107-Cr
5. Tempering heat treatment should be carried out in time after welding. If it is difficult to carry out tempering treatment in time, intermediate annealing or holding at a temperature higher than preheating can be carried out for a period of time to exclude diffused hydrogen and soften the tissue. For products with complex structure and more welds, an intermediate annealing can be carried out after welding a certain number of welds.
