Y45Ca cutting steel:
● Features and application:
Have excellent cutting performance, suitable for high speed machining, normal processing, the processing speed of up to 150m/min more than 45 steel increased cutting speed more than doubled. Heat treatment has good mechanical properties, generally used in the manufacture of the more important parts, such as the gear shaft, spline shaft and the tractor drive shaft, also commonly used in the automatic cutting machine high-strength standard parts such as bolts, nuts?,
● Chemical Composition:
Carbon C: 0.42 ~ 0.50 '
Si Si: 0.20 ~ 0.40
Manganese Mn: 0.60 ~ 0.90
Sulfur S: 0.04 ~ 0.08
Phosphorus P: ≤ 0.04
Chromium Cr: allow the residual content ≤ 0.025
Ni: to allow the residual content of ≤ 0.025
Copper Cu: allow the residual content ≤ 0.025; thermal processing, ≤ 0.20
Calcium Ca: 0.002 ~ 0.006 (allowable deviation, 0.002, -0.0005)
● Mechanical Properties:
Tensile strength σb (MPa): (hot) 600 - 745; (cold drawn) steel thickness or diameter of 8 to 20 hours: 695 ~ 920;> 20 to 30 hours: 655 ~ 855;> 30 hours: 635 ~ 835 ; (heat treatment) diameter>
Yield strength σs (MPa): (heat treatment) diameter> 16:00: ≥ 355
Elongation δ5 (%):( hot) ≥ 12; (cold) ≥ 6.0; (heat treatment) diameter> 16:00: ≥ 16
Reduction of ψ (%):( hot) ≥ 26; (heat treatment) diameter> 16:00: ≥ 40
Impact energy Akv (J): (heat treatment) diameter> 16:00: ≥ 39
Hardness: (hot) ≤ 241HB; (cold drawing) 196 ~ 255HB
● Heat treatment and microstructure specifications:
Heat treatment specifications: 1) Pull the sample blank (φ25) normalizing 830 ~ 850 ℃, heat 30min. 2) the impact of the sample blank (φ15) quenching, quenching 840 ± 20 ℃, water, tempering recommend 600 ℃.
● Delivery status: the hot-rolled or cold-drawn state of delivery, delivery status should be indicated in the contract.