Heat treatment process of drill rod pipe body
A technology of drill pipe and process, which is applied in the field of heat treatment process of pipe body, can solve the problems that the tensile properties of drill pipe body cannot meet the requirements, and it is difficult to meet the technical requirements of V150 steel grade drill pipe, etc., and achieve simple heat treatment steps, Good impact performance and reasonable process parameters
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[0019] The invention will be further described in detail below through specific embodiments.
[0020] Using a company's drill pipe body, its chemical composition is, C: 0.26, Cr: 0.98, Mo: 0.64, V: 0.005, Si: 0.22, Mn: 0.75, Cu: 0.03, S: 0.001, P: 0.008, The remainder is Fe, and the unit is mass percent. Heat treatment as follows:
[0021] ①Quenching
[0022] a. The drill pipe body is transported to a step-by-step quenching furnace heated to 910°C, and kept for 60 minutes;
[0023] b. After the drill pipe body is released from the furnace, enter the quenching liquid at 23°C within 15 seconds. The quenching liquid is tap water, and rotates at a speed of 88 rpm. The quenching time is 40 seconds, and the temperature of the quenching liquid is adjusted by the cooling tower. , The drill pipe body rotates at a certain rate for rapid and uniform quenching to form a fine and uniform grain structure.
[0024] ②Tempering
[0025] Within 1 hour of quenching, the drill pipe body is t...
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