李志, 高谦, 高登攀, et al. Effect of Heat Treatment on Mechanical Properties of High Strength Free-Cutting Precipitation Hardening Stainless Steel 2Cr16Ni3Mo2CuN[J]. Special Steel, 2005, 26(6): 23-25.
李志, 高谦, 高登攀, et al. Effect of Heat Treatment on Mechanical Properties of High Strength Free-Cutting Precipitation Hardening Stainless Steel 2Cr16Ni3Mo2CuN[J]. Special Steel, 2005, 26(6): 23-25.DOI:
The high strength free-cutting precipitation hardening stainless steel 2Cr16Ni3Mo2CuN has excellent cutting property in annealing conditions. The Brinell hardness(HB)number of steel 2Cr16N3Mo2CuN treated by first annealing at temperature between 710 ℃ and 800 ℃ and second annealing at temperature between 570 ℃ and 620 ℃ and the mechanical properties of steel treated with 1050~1085 ℃ for 45 min oil cooling
-70 ℃ for 2 h and 150 ℃ or 170 ℃ tempering have been studied. The test results showed that HB number of steel 2Cr16Ni3Mo2CuN treated with 710~740 ℃ for 5 h + 620 ℃5 h was less than 321 and tensile strength σ
b
of steel was ≥1520 MPa
δ
5
≥12% and impact energy A
KU
≥40 J. The steel 2Cr16Ni3Mo2CuN showed obvious secondary harde
ring effect and the peak temperature range of this effect was between 480 ℃ and 520℃.