Production process for 4330V forging used for deep-sea oil extraction equipment
A production process and forging technology, which is applied in the production process of 4330V forgings for deep-sea oil production equipment, can solve problems such as hardenability, microstructure refinement strength and impact toughness defects, and achieve long service life, low maintenance costs, and reliability. high sex effect
Inactive Publication Date: 2014-09-10
ZHANGJIAGANG HAIGUO HEAVY FORGING
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Problems solved by technology
But 30CrNi 2 There are certain defects in the overall hardenability, microstructure refinement, strength and impact toughness of Mo steel.
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Embodiment Construction
[0011] The production process of the 4330V forging for deep-sea oil production equipment according to the present invention will be further described in detail through specific examples below.
[0012] The production process of 4330V forgings for deep sea oil production equipment includes the following steps:
[0013] a. Forging: The initial forging temperature is 1200°C, if it exceeds 1200°C, it will easily cause overheating or even overheating. Determine a reasonable holding time according to the size of the billet, and a reasonable holding time is the basis for ensuring that the grains are not easy to grow. The final forging temperature is 850°C. If the final forging temperature is too low, the parts may crack, and if it is too high, it is also the reason for the formation of coarse grains. The forging ratio must be guaranteed to be greater than 4:1, which can ensure a tight structure after forging, and can break the coarse austenite grains, diffuse the inclusions, elimina...
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Abstract
The invention relates to a production process for a 4330V forging used for deep-sea oil extraction equipment. The production process comprises the following steps: forging, wherein an initial forging temperature is 1200 DEG C, a final forging temperature is 850 DEG C, and a forging ratio is greater than 4: 1; heat treatment after forging: a step of carrying out normalizing at 870 to 890 DEG C and then carrying out air cooling; and performance heat treatment: a step of rapidly heating the forging to 870 to 880 DEG C with a heating speed of about 200 DEG C / h, maintaining the temperature for 2.5 to 3 h, then carrying out rapid copious cooling, carrying out tempering and finally carrying out water cooling after heat preservation for a proper period of time, wherein water temperature has to be reduced and cooling water should be circulated and stirred to ensure rapid cooling to less than 40 DEG C during rapid copious cooling, and tempering temperature is 600 to 620 DEG C. The forging prepared by using the production process which is used as an upstream forging product for the deep-sea oil extraction equipment and designed on the basis of a 30CrNi2Mo steel material completely meets harsh requirements of severe conditions of the deep-sea oil extraction equipment through self-dependent innovation of forging and heat treatment technology, and the forging has the characteristics of high reliability, long service life, low maintenance cost, etc.
Description
technical field [0001] The invention relates to a production process of a 4330V forging for deep sea oil production equipment. Background technique [0002] At present, deep sea oil production equipment usually uses 30CrNi 2 Mo steel. But 30CrNi 2 There are certain defects in the overall hardenability, microstructure refinement, strength and impact toughness of Mo steel. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a production process capable of preparing 4330V forgings for deep sea oil production equipment that can meet the performance indicators required by deep sea oil production equipment. [0004] In order to solve the above problems, the technical solution adopted in the present invention is: the production process of 4330V forgings for deep sea oil production equipment, including the following steps: [0005] a. Forging: the initial forging temperature is 1200°C, the final forging temperature is 85...
Claims
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IPC IPC(8): C21D8/00C21D6/00B21J5/00
Inventor 盛雪华
Owner ZHANGJIAGANG HAIGUO HEAVY FORGING