A kind of processing technology of the compression pump clack box of oil fracturing car
Technical field
The present invention relates to the processing technology of the compression pump clack box of a kind of oil fracturing car.
Background technology
Compression pump clack box is the key fitment of oil fracturing car, and compression pump clack box utilizes compression pump
Group, injects fracturing fluid in well with the discharge capacity substantially exceeding formation absorption ability, makes formation fracture,
Continue to inject in seam fracturing fluid.In fracturing process, product cavity is the most in a high voltage state.
Compression pump clack box generally uses 4330V MOD steel alloy, uses normalizing, quenched place
Science and engineering skill is processed, and owing to compression pump clack box is oversize, often has influence on overall quenching degree,
The reduction of compression pump clack box heart portion intensity directly affects the service life of compression pump clack box.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the heart portion intensity of existing compression pump clack box not
High defect, it is provided that the processing technology of the compression pump clack box of a kind of oil fracturing car.
In order to solve above-mentioned technical problem, the invention provides following technical scheme:
The processing technology of the compression pump clack box of a kind of oil fracturing car, comprises the following steps:
1), compression pump clack box forging blank carries out roughing;
2), normalizing, quenched;
3), polish;
4), firmly nitrogenize
At outer surface and all screw threads just one layer of impermeable coating of brush of compression pump clack box, coating is dried
Rear shove charge carries out thermal nitridation process;The heating-up temperature of hard nitridation is 500~550 DEG C, during process
Between be 15~70 hours;After hard nitrogen treatment, the case hardness of forging inner chamber is 53~58HRC;
The depth of nitration of hard nitrogen treatment is 0.5-0.8mm.
5), packaging.
Further, described step 2) normalizing, quenched include following several step:
(1), normalizing for the first time, supercool
Described first time normalizing is, after the forging of compression pump clack box is heated up to 900~920 DEG C,
Keep this temperature 8~14h;
(2), normalizing for the second time, supercool
Described second time normalizing is, after the forging of compression pump clack box is heated up to 880~900 DEG C,
Keep this temperature 8~14h;
(3), modifier treatment
Quench after forging being heated up to 840~880 DEG C and keeping this temperature 8~14h, by forging
It is tempered after being heated up to 580~640 DEG C and keeping this temperature 12~18h;Described first time mistake
Cold and second time the most supercool is: by air-cooled for forging after 250 DEG C, air cooling is to room temperature.
The compression pump clack box processing technology of the oil fracturing car of the present invention, increases after finishing step
Having added hard nitriding process, the heating-up temperature of hard nitridation is 500~550 DEG C, the process time be 15~
70 hours;After hard nitrogen treatment, the case hardness of forging inner chamber is 53~58HRC, at hard nitridation
The depth of nitration of reason is 0.5-0.8mm;Both kept the quenching and tempering hardness of workpiece, made again product cavity
Surface has high rigidity, improves the red hardness of surface of internal cavity, wearability, corrosion stability and bite-resistant
Performance, improves the service life of product 20%, has good market prospect.
Detailed description of the invention
Hereinafter the preferred embodiments of the present invention are illustrated, it will be appreciated that described herein
Preferred embodiment is merely to illustrate and explains the present invention, is not intended to limit the present invention.
Embodiment 1
The processing technology of the compression pump clack box of a kind of oil fracturing car, comprises the following steps:
1), compression pump clack box forging blank carries out roughing;
2), normalizing, quenched
1., normalizing for the first time, supercool
Described first time normalizing is, after the forging of compression pump clack box is heated up to 900 DEG C, keeps
This temperature 14h;
2., normalizing for the second time, supercool
Described second time normalizing is, after the forging of compression pump clack box is heated up to 880 DEG C, keeps
This temperature 14h;
3., modifier treatment
Quench after forging being heated up to 840 DEG C and keeping this temperature 14h, forging is heated up to
580 DEG C and be tempered after keeping this temperature 18h;Described first time is supercool and second time is supercool all
For: by air-cooled for forging after 250 DEG C, air cooling is to room temperature.
3), polish;
4), firmly nitrogenize
At outer surface and all screw threads just one layer of impermeable coating of brush of compression pump clack box, coating is dried
Rear shove charge carries out thermal nitridation process;The heating-up temperature of hard nitridation is 500 DEG C, and the process time is 70
Hour;After hard nitrogen treatment, the case hardness of forging inner chamber is 58HRC;
5), packaging.
Embodiment 2
The processing technology of the compression pump clack box of a kind of oil fracturing car, comprises the following steps:
1), compression pump clack box forging blank carries out roughing;
2), normalizing, quenched
1., normalizing for the first time, supercool
Described first time normalizing is, after the forging of compression pump clack box is heated up to 920 DEG C, keeps
This temperature 8h;
2., normalizing for the second time, supercool
Described second time normalizing is, after the forging of compression pump clack box is heated up to 900 DEG C, keeps
This temperature 8h;
3., modifier treatment
Quench after forging being heated up to 880 DEG C and keeping this temperature 8h, forging is heated up to 640
DEG C and keep being tempered after this temperature 12h;Described first time is supercool and second time is supercool is:
By air-cooled for forging after 250 DEG C, air cooling is to room temperature.
3), polish;
4), firmly nitrogenize
At outer surface and all screw threads just one layer of impermeable coating of brush of compression pump clack box, coating is dried
Rear shove charge carries out thermal nitridation process;The heating-up temperature of hard nitridation is 550 DEG C, and the process time is 15
Hour;After hard nitrogen treatment, the case hardness of forging inner chamber is 53HRC;
5), packaging.
Embodiment 3
The processing technology of the compression pump clack box of a kind of oil fracturing car, comprises the following steps:
1), compression pump clack box forging blank carries out roughing;
2), normalizing, quenched
1., normalizing for the first time, supercool
Described first time normalizing is, after the forging of compression pump clack box is heated up to 910 DEG C, keeps
This temperature 11h;
2., normalizing for the second time, supercool
Described second time normalizing is, after the forging of compression pump clack box is heated up to 865 DEG C, keeps
This temperature 11h;
3., modifier treatment
Quench after forging being heated up to 860 DEG C and keeping this temperature 11h, forging is heated up to
610 DEG C and be tempered after keeping this temperature 15h;Described first time is supercool and second time is supercool all
For: by air-cooled for forging after 250 DEG C, air cooling is to room temperature.
3), polish;
4), firmly nitrogenize
At outer surface and all screw threads just one layer of impermeable coating of brush of compression pump clack box, coating is dried
Rear shove charge carries out thermal nitridation process;The heating-up temperature of hard nitridation is 525 DEG C, and the process time is 40
Hour;After hard nitrogen treatment, the case hardness of forging inner chamber is 56HRC;
5), packaging.
Last it is noted that the foregoing is only the preferred embodiments of the present invention, not
For limiting the present invention, although the present invention being described in detail with reference to previous embodiment,
For a person skilled in the art, it still can be to the skill described in foregoing embodiments
Art scheme is modified, or wherein portion of techniques feature is carried out equivalent.All at this
Within bright spirit and principle, any modification, equivalent substitution and improvement etc. made, all should wrap
Within being contained in protection scope of the present invention.