Zhao Qianshui, Sui Lingyun. Production Practice of Steel 37CrMnMo for Coupling Sleeve of Petroleum Drill Stem[J]. Special Steel, 2007, 28(3): 66-67.DOI:
≤0.008S)for coupling sleeve of petroleum drill stem are produced by 50t EBT arc furnace-LF (VD)-Al and Ca-Si wire feeding-3.16 t ingot casting-800/650×4 mills rolling flow sheet at Benxi steel. Analyais and examination results showed that hydrogen content in steel products was (0.5~1)×10
-6
oxygen content(8~20)×10
-6
nitrogen content(55~90)×10
-6
inclusion rating 0~2
J
25
hardenability HRC value 42~51
transversal impact energy at - 10℃ 56~218J
longitudinal impact energy at - 10℃ 76~233 J and the strength and plasticity of products all met the requirement of standard.