Sucker rod in super II level
A sucker rod and steel technology, applied in drill pipes, heat treatment process control, heat treatment equipment, etc., can solve the problems of low reliability, unattainable fatigue strength, unable to meet the requirements of sucker rod manufacturing, etc., and reduce the load of rod string. , the effect of reducing power consumption
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Embodiment 1
[0020] Embodiment 1, a super H-grade sucker rod, the weight percentage of each chemical composition in the steel is: carbon 0.07%, silicon 0.40%, manganese 1.60%, chromium 0.60%, molybdenum 0.20%, nickel 0.3%, copper 0.20% %, phosphorus 0.025%, sulfur 0.25%, and the balance is iron.
[0021] The manufacture method of super H grade sucker rod of the present invention comprises the following steps:
[0022] 1. Preparation of steel for super H-grade sucker rods: The raw materials obtained according to the above formula are smelted in an electric furnace, and the molten steel is poured into a 560kg steel ingot. Rolled into 65mm×65mm by Φ650X1 and Φ650X3 rolling mills 2 After the square billet is made, the Φ400X1 and Φ250X5 continuous rolling mills adopt the controlled rolling and controlled cooling process: the heating temperature is 1090°C, the final rolling temperature is 900°C, and the cooling rate is 3°C / s to roll the billet into Φ28 round steel, which is cut into 7m feet, a...
Embodiment 2
[0026] Embodiment 2, a super H-grade sucker rod, the weight percentage of each chemical composition in the steel is: carbon 0.13%, silicon 1.20%, manganese 2.2%, chromium 1.70%, molybdenum 0.40%, nickel 0.3%, copper 0.20% %, phosphorus 0.025%, sulfur 0.25%, and the balance is iron. The manufacturing method of the super H-class sucker rod of the present invention is the same as that of the first embodiment.
Embodiment 3
[0027] Embodiment 3, a super H-grade sucker rod, the weight percentage of each chemical composition in the steel is: carbon 0.08%, silicon 0.50%, manganese 1.70%, chromium 0.90%, molybdenum 0.25%, nickel 0.2%, copper 0.15% %, phosphorus 0.02%, sulfur 0.20%, and the balance is iron. The manufacturing method of the super H-class sucker rod of the present invention is the same as that of the first embodiment.
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