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Application of the GCr15 steel
GCr15 steel is often used in the manufacture of small section size of drawing die, punching and cold heading die
After quenching and tempering has higher hardness, uniform texture, good wear resistance, high contact fatigue performance. The steel cold plastic working medium, cutting performance in general, poor welding performance, on the formation of white spots sensitive performance, have the temper brittleness. The actual is Cr15.
GCr15 is a kind of high chromium bearing steel is the most commonly used, with high hardenability, after heat treatment, can obtain high and uniform hardness. Wear resistance higher than GCr9, the contact fatigue of high strength, good dimensional stability and corrosion resistance, cold plastic deformation of medium, cutting and general, poor welding, forming a sensitive to white, with a first class of temper brittleness. In the ball bearing manufacturing, for the bearing sleeve of grade H to grade C impurity wall thickness of 12mm. diameter <250mm, diameter of steel ball of 25.4-50.8mm; the roller diameter <22mm, also can be used as a heavy load. The requirements of high wear resistance. The high elastic limit at high contact fatigue strength of other mechanical parts and various precision measuring cold die etc.. Such as ball screw machine, micro turbine jet engine nozzle plunger. Valve. The bushing.
The chemical composition / GCr15 content (%) C:0.95-1.05 Mn:0.25-0.45 Si:0.15-0.35 S:<=0.025 P:<=0.025 Cr:1.40-1.65 Mo: = 0.10 Ni: = 0.30 Cu: = 0.25 Ni+Cu = 0.50