CN1876886A - Process for machining nitrified parts of impact type hydroturbine generator unit - Google Patents
Process for machining nitrified parts of impact type hydroturbine generator unit Download PDFInfo
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- CN1876886A CN1876886A CN 200610021307 CN200610021307A CN1876886A CN 1876886 A CN1876886 A CN 1876886A CN 200610021307 CN200610021307 CN 200610021307 CN 200610021307 A CN200610021307 A CN 200610021307A CN 1876886 A CN1876886 A CN 1876886A
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- nitriding
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Abstract
The invention discloses a processing technique for nitrogenizing accessory of impact hydro-turbo generator set, which includes treatment -fine turning -pulling -drilling-niping-stable drawing -milling-niping-nitriding-buffing-niping by turn, in which the nitriding process includes placing nitriding workpiece into nitriding furnace-inputting nitriding gas into nitriding furnace-warming-up, heating the nitriding furnace temperature from indoor temperature to 520-560 DEG C and holding elevated temperature for 110-100 hours -air-cooled tapping. The dominance of this invention lies in that it eliminates the work inner built-in stress in heat treatment of nitriding process and solves the work deformation and the difficult problem that the work nitriding surface is easy to produce layer which are both caused by built-in stress.
Description
Technical field
The present invention relates to the process of surface treatment of steel component, particularly relate to process for machining nitrified parts of impact type hydroturbine generator unit.
Background technology
Along with the capacity and the runner diameter of impingement type hydraulic generator group are increasing, unit nozzle number is more and more, head is also more and more higher, the nozzle assembled construction is more and more exquisite, tight, operating mechanism in the nozzle assembling also becomes increasingly complex, the control of therefore undertaking component processing quality in the nozzle assembling of unit flow and power control is most important, and particularly process for machining nitrified parts wherein is even more important.
Nitrogenize is the process of infiltrating nitrogen-atoms to the surface of steel.The purpose of component nitrogenize is in order to make workpiece have higher surface hardness and wear resistance, to improve the anti-cavitation performance and the safe range of stress of workpiece, prolonging the work-ing life of workpiece in the impingement type hydraulic generator group.But existing nitriding process exists and causes drawbacks such as workpiece deformation, the easy aliquation of workpiece nitrided surface because of not eliminating the workpiece internal residual stress fully.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of process for machining nitrified parts of impact type hydroturbine generator unit is provided, can not eliminates an easily difficult problem such as its layer of the workpiece deformation that causes, workpiece nitrided surface fully because of the unrelieved stress of workpiece when this complete processing has solved existing nitriding process thermal treatment.
Goal of the invention of the present invention is achieved through the following technical solutions: process for machining nitrified parts of impact type hydroturbine generator unit, and this complete processing comprises following operation:
(1) matter is handled, and makes workpiece obtain the tempered sorbite tissue;
(2) finish turning, draw, bore, pincers, remove excessive grind;
(3) stable tempering, the internal residual stress of elimination workpiece;
(4) mill, pincers are removed residual grind;
(5) nitrogenize;
(6) polishing, pincers.
Wherein, described nitrogenize operation may further comprise the steps:
(1) the nitrogenize workpiece is inserted in the nitriding furnace;
(2) send nitriding gas to nitriding furnace;
(3) heat up, the nitriding furnace temperature is risen to 520～560 ℃ from room temperature, and kept high temperature 10～100 hours;
(4) air cooling is come out of the stove, and the nitriding furnace temperature is reduced to room temperature, and the nitrogenize workpiece is come out of the stove.
Described nitriding furnace is cabinet-type electric furnace or well-type electric furnace.
Described nitriding gas is ammonia and nitrogen mixture body.
The internal residual stress of workpiece when advantage of the present invention has been to eliminate thermal treatment in the nitriding process has solved because of difficult problems such as workpiece deformation that unrelieved stress causes, the easy aliquations of workpiece nitrided surface.
Embodiment
Embodiment 1: process for machining nitrified parts of impact type hydroturbine generator unit, and this complete processing comprises following operation:
(1) modifier treatment makes workpiece obtain the tempered sorbite tissue;
(2) finish turning, draw, bore, pincers, remove excessive grind;
(3) stable tempering, the internal residual stress of elimination workpiece;
(4) mill, pincers are removed residual grind;
(5) nitrogenize;
(6) polishing, pincers.
Wherein, described nitrogenize operation may further comprise the steps:
(1) the nitrogenize workpiece is inserted in the nitriding furnace;
(2) send nitriding gas to nitriding furnace;
(3) heat up, the nitriding furnace temperature is risen to 520 ℃ from room temperature, and kept high temperature 100 hours;
(4) air cooling is come out of the stove, and the nitriding furnace temperature is reduced to room temperature, and the nitrogenize workpiece is come out of the stove.
Employed nitriding furnace is a cabinet-type electric furnace, use nitriding gas be ammonia and nitrogen mixture body, the main raw of nitrogenize part is 1C
r13 and 2C
r13 martensite steel sections.
Embodiment 2: process for machining nitrified parts of impact type hydroturbine generator unit, and this complete processing comprises following operation:
(1) modifier treatment makes workpiece obtain the tempered sorbite tissue;
(2) finish turning, draw, bore, pincers, remove excessive grind;
(3) stable tempering, the internal residual stress of elimination workpiece;
(4) mill, pincers are removed residual grind;
(5) nitrogenize;
(6) polishing, pincers.
Wherein, described nitrogenize operation may further comprise the steps:
(1) the nitrogenize workpiece is inserted in the nitriding furnace;
(2) send nitriding gas to nitriding furnace;
(3) heat up, the nitriding furnace temperature is risen to 560 ℃ from room temperature, and kept high temperature 10 hours;
(4) air cooling is come out of the stove, and the nitriding furnace temperature is reduced to room temperature, and the nitrogenize workpiece is come out of the stove.
Employed nitriding furnace is a well-type electric furnace, use nitriding gas be ammonia and nitrogen mixture body, the main raw of nitrogenize part is 1C
r13 and 2C
r13 martensite steel sections.
Embodiment 3: process for machining nitrified parts of impact type hydroturbine generator unit, and this complete processing comprises following operation:
(1) modifier treatment makes workpiece obtain the tempered sorbite tissue;
(2) finish turning, draw, bore, pincers, remove excessive grind;
(3) stable tempering, the internal residual stress of elimination workpiece;
(4) mill, pincers are removed residual grind;
(5) nitrogenize;
(6) polishing, pincers.
Wherein, described nitrogenize operation may further comprise the steps:
(1) the nitrogenize workpiece is inserted in the nitriding furnace;
(2) send nitriding gas to nitriding furnace;
(3) heat up, the nitriding furnace temperature is risen to 540 ℃ from room temperature, and kept high temperature 50 hours;
(4) air cooling is come out of the stove, and the nitriding furnace temperature is reduced to room temperature, and the nitrogenize workpiece is come out of the stove.
Employed nitriding furnace is a cabinet-type electric furnace, use nitriding gas be ammonia and nitrogen mixture body, the main raw of nitrogenize part is 1C
r13 and 2C
r13 martensite steel sections.
Claims (5)
1, process for machining nitrified parts of impact type hydroturbine generator unit is characterized in that this complete processing comprises following operation:
(1) modifier treatment makes workpiece obtain the tempered sorbite tissue;
(2) finish turning, draw, bore, pincers, remove excessive grind;
(3) stable tempering, the internal residual stress of elimination workpiece;
(4) mill, pincers are removed residual grind;
(5) nitrogenize;
(6) polishing, pincers.
2, process for machining nitrified parts of impact type hydroturbine generator unit according to claim 1 is characterized in that described nitrogenize operation may further comprise the steps:
(1) the nitrogenize workpiece is inserted in the nitriding furnace;
(2) send nitriding gas to nitriding furnace;
(3) heat up, the nitriding furnace temperature is risen to 520～560 ℃ from room temperature, and kept high temperature 10～100 hours;
(4) air cooling is come out of the stove, and the nitriding furnace temperature is reduced to room temperature, and the nitrogenize workpiece is come out of the stove.
3, process for machining nitrified parts of impact type hydroturbine generator unit according to claim 1 is characterized in that described nitriding furnace is a cabinet-type electric furnace.
4, process for machining nitrified parts of impact type hydroturbine generator unit according to claim 1 is characterized in that described nitriding furnace is a well-type electric furnace.
5, process for machining nitrified parts of impact type hydroturbine generator unit according to claim 1 is characterized in that described nitriding gas is ammonia and nitrogen mixture body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610021307 CN1876886A (en) | 2006-07-03 | 2006-07-03 | Process for machining nitrified parts of impact type hydroturbine generator unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610021307 CN1876886A (en) | 2006-07-03 | 2006-07-03 | Process for machining nitrified parts of impact type hydroturbine generator unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1876886A true CN1876886A (en) | 2006-12-13 |
Family
ID=37509437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610021307 Pending CN1876886A (en) | 2006-07-03 | 2006-07-03 | Process for machining nitrified parts of impact type hydroturbine generator unit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101486145B (en) * | 2009-01-16 | 2011-08-17 | 北京中材人工晶体有限公司 | Method for processing ceramic bearing ball |
| CN102994939A (en) * | 2013-01-07 | 2013-03-27 | 聊城市人和精工轴承有限公司 | Vacuum pulse nitriding process used for heat treatment of bearing cage |
| CN103627872A (en) * | 2012-08-22 | 2014-03-12 | 上海锡华机械工程有限公司 | Heat treatment method for C-shaped rapid shackle |
| CN108103432A (en) * | 2017-12-25 | 2018-06-01 | 哈尔滨汽轮机厂有限责任公司 | A kind of nitriding method of nickel base superalloy |
-
2006
- 2006-07-03 CN CN 200610021307 patent/CN1876886A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101486145B (en) * | 2009-01-16 | 2011-08-17 | 北京中材人工晶体有限公司 | Method for processing ceramic bearing ball |
| CN103627872A (en) * | 2012-08-22 | 2014-03-12 | 上海锡华机械工程有限公司 | Heat treatment method for C-shaped rapid shackle |
| CN103627872B (en) * | 2012-08-22 | 2015-10-28 | 上海锡华机械工程有限公司 | A kind of heat treating method of C type fast shackle |
| CN102994939A (en) * | 2013-01-07 | 2013-03-27 | 聊城市人和精工轴承有限公司 | Vacuum pulse nitriding process used for heat treatment of bearing cage |
| CN102994939B (en) * | 2013-01-07 | 2014-08-06 | 聊城市人和精工轴承有限公司 | Vacuum pulse nitriding process used for heat treatment of bearing cage |
| CN108103432A (en) * | 2017-12-25 | 2018-06-01 | 哈尔滨汽轮机厂有限责任公司 | A kind of nitriding method of nickel base superalloy |
| CN108103432B (en) * | 2017-12-25 | 2020-01-17 | 哈尔滨汽轮机厂有限责任公司 | Nitriding method of nickel-based high-temperature alloy |
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