Abstract:  In order to adapt the application requirement for deep well and extradeep well, a combined strength and low temperature impact toughness of TG22 hot rolling steel pipes casing is developed by design of chemical composition and optimization of rolling process. The results indicated that the designed chemical composition is Fe-0. 24% C-0.20% Si-1.30% Mn-0.020% Nb, the target temperature in the heating furnace is 1170 °C and the intermediate slab thickness is 46 mm, the finishing rolling temperature is 830 with coiling at 570℃ , the mechanical properties of strip are Rel 506 ~ 554 MPa、 Rm 654 ~685 MPa.A₅₀29% 〜35%、Rel/Rm 0.75 ~0. 82 and KV₂( - 10℃ ) 45.5 -63.6 J.

Key words: Chemical Design, Hot Rolling Process, TG22 Hot Rolled Steel Strip, Mechanical Properties ,

摘要： 为了适应深井及超深井应用需求,通过设计化学成分及优化轧制工艺,开发一种兼备强度和低温冲击韧性的油气井用TG22热轧钢带。结果表明:采用化学成分设计为Fe-0.24%C-0.20%Si-1.30%Mn-0.020%Nb时,加热炉目标出钢温度1170℃、中间坯厚度46mm、终轧温度830℃和卷取温度570℃时,热轧钢带力学性能为Rel 506～554 MPa、Rm 654～685 MPa、A₅₀29%～35%、Rel/Rm 0.75～0.82及KV₂（-10℃）45.5～63.6 J。

关键词: 成分设计, 热轧工艺, TG22热轧钢带, 力学性能