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Heat treatment technology of oil casing

  • Categories:Industry News
  • Author:
  • Origin:
  • Time of issue:2018-01-30 14:49
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(Summary description)Petroleum casing pipe is a kind of pipeline for transporting petroleum or other raw materials. It has good performance in use and is well received and

Heat treatment technology of oil casing

(Summary description)Petroleum casing pipe is a kind of pipeline for transporting petroleum or other raw materials. It has good performance in use and is well received and

  • Categories:Industry News
  • Author:
  • Origin:
  • Time of issue:2018-01-30 14:49
  • Views:
Information

Petroleum casing pipe is a kind of pipeline for transporting petroleum or other raw materials. It has good performance in use and is well received and loved by users. The heating of oil casing shall be carried out according to a certain temperature, and different temperature controls shall be adopted in different temperature segments. AC1=736 ° C and AC3=810 ° C of 27MnCrV steel, and the heating temperature shall be between 740-810 ° C during the quench. The heating temperature of 780℃ is selected for the quenchable quenching, and the holding time of quenching heating is 15min. After quenching, the tempering temperature is selected to 630℃, and the tempering time is 50min. Since the sub - temperature quenching is heated in the + two-phase region and quenched in a partially undissolved ferrite state, the toughness is improved while the strength is maintained.

The heat treatment of oil casing shall be strictly carried out to ensure that the oil casing produced has good product quality and performance, shows good use value and performance in use, maintains high strength and toughness, and conducts heat treatment in different ways.

At the same time, the low temperature quenching is lower than the conventional temperature, which reduces the quenching stress and thus reduces the quenching deformation, thus ensuring the smooth operation of the production of oil casing heat treatment, and providing a good raw material for subsequent wire processing.

At present, this process has been applied in pipe processing plants of different steel tubes. The quality assurance data show that the yield strength Rt0.6 after heat treatment is 820-860mpa, the tensile strength Rm is 910-940mpa, the impact toughness Akv is between 65-85J, and the destruction resistance is 100% qualified. The data show that the 27MnCrV steel pipe is a high quality high grade petroleum casing, and on the other hand, it also shows that the quench process is an excellent method to avoid high temperature brittleness in the production of steel products.

After the oil casing adopts this heat treatment method, it can effectively improve the tensile strength, impact toughness and damage resistance of the oil casing, so as to ensure that it has good value in use.

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