What’s the application of 40Cr alloy tube after quenching and tempering?

40Cr steel is a Chinese GB standard steel grade. 40Cr alloy tube is one of the widely used steel in machinery manufacturing. After tempering, it has good comprehensive mechanical properties, good low temperature impact toughness and low notch sensitivity. The hardenability of steel is good. 40Cr alloy tube can be hardened to Ф28～60mm when water quenching, and Ф15～40mm when oil quenching. In addition to quenching and tempering treatment, 40Cr alloy tube is also suitable for cyanidation and high frequency quenching treatment. The cutting performance is better. When the hardness of the 40Cr alloy tube is 174～229HB, the relative cutting workability is 60%. The steel is suitable for making medium-sized plastic molds.
 
Application of 40Cr alloy tube after quenching and tempering
The 40Cr alloy tube can be used for the manufacture of medium-speed and medium-load parts after quenching and tempering, such as machine tool gears, shafts, worms, spline shafts, thimble sleeves, etc.; quenching and tempering and surface high frequency quenching are used to manufacture high surface hardness and high resistance Grinding parts, such as gears, shafts, main shafts, crankshafts, mandrel sleeves, pins, connecting rods, intake valves, screws, etc. quenched and tempered at medium temperature are used to manufacture heavy-duty, medium-speed impact parts, such as oil pump rotors , Sliders, gears, spindle sleeves, etc.; quenching and low temperature tempering are used to manufacture heavy-duty, low-impact, and wear-resistant parts, such as worms, shafts, sleeves, etc.; carbon-nitrogen treatment has a larger size and high temperature toughness transmission parts, such as shafts, gears.
 

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