CN103205542A - Maintenance method of vacuum quenching oil - Google Patents
Maintenance method of vacuum quenching oil Download PDFInfo
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- CN103205542A CN103205542A CN2013101028851A CN201310102885A CN103205542A CN 103205542 A CN103205542 A CN 103205542A CN 2013101028851 A CN2013101028851 A CN 2013101028851A CN 201310102885 A CN201310102885 A CN 201310102885A CN 103205542 A CN103205542 A CN 103205542A
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Abstract
The invention discloses a maintenance method of a vacuum quenching oil. The method includes vacuumizing a vacuum quenching chamber to no more than 10 Pa; mixing oil intermittently; observing whether or not the quenching oil boils; repeating steps of mixing oil intermittently and vacuumizing to no more than 10 Pa; and maintaining a vacuum degree of the vacuum quenching chamber at no more than 10 Pa, thereby finishing. According to the present invention, the maintenance method of the vacuum quenching oil is simple to operate and safe, reduces the consumption of equipment, manpower and energy, and meanwhile guarantees quality of products, and prolongs service life of the quenching oil.
Description
Technical field
The present invention relates to a kind of maintenance procedure of vacuum quenching oil, belong to the vacuum heat treatment field.
Background technology
Vacuum heat treatment technology has non-oxidation, no decarburization, the degassing, degreasing, advantages such as surface quality is good, distortion is small, heat-treatment part comprehensive mechanical property excellence, long service life, has obtained widespread use at home and abroad.Vacuum oil quenching is modal mode during vacuum hardening is handled, and wherein vacuum quenching oil is as the determinative of workpiece quench cooled, and the quality of its quality has directly determined tissue and the performance after workpiece quenches.
Gas content in the vacuum quenching oil has considerable influence to the quenching quality.It is brightless to contain the workpiece surface that can cause behind a certain amount of gas after the vacuum hardening in the quenching oil, and the problems such as back hardness deficiency or deflection are big of quenching also can contaminated vacuum system when serious.So explicitly call for " before fresh oil uses; vacuum quenching oil processings that must outgas " in " in the 5.5.2.5 oil gas content control " among the JB/T6955 " the quenchant technical requirements is used in thermal treatment always ", to remove vacuum quenching oil in standing storage and the gas of sneaking in transporting.In the normal productive process, because charging and the discharging of part, in the opening procedure of fire door, can bring a little air into, make gas content increase in the quenching oil, run up to a certain degree and can cause the problems referred to above equally when containing gas volume, and in relevant national standard or the industry standard degassing of vacuum quenching oil in the use safeguarded and do not explicitly call for.At present some thermal treatment producers often wait until in the vacuum heat treatment production process when air content in the quenching oil has influence on workpiece quenching quality that just blowing out is to the quenching oil processing that outgases, and the relatively strict producer of some quality controls carries out a vacuum oil degassing separately every the first quarter or half a year to handle, degassing operation is generally quenching oil is heated to below 80 ℃, insulation 6-12h.
Summary of the invention
The purpose of this invention is to provide a kind of maintenance procedure of vacuum quenching oil.
In order to realize above purpose, the technical solution adopted in the present invention is: a kind of maintenance procedure of vacuum quenching oil, and the concrete operations step is as follows:
(1) the vacuum hardening chamber is vacuumized, make vacuum hardening chamber vacuum tightness≤10Pa;
(2) intermittent type carries out the oil stirring, and whether observe the quenching pasta has boiling phenomenon;
(3) observe the boiling of quenching pasta, stopping oil stirring, continue to be evacuated to vacuum hardening chamber vacuum tightness≤10Pa, the intermittent type of repeating vacuum quenching chamber oil stirs and is evacuated to vacuum tightness≤10Pa, and intermittent type oil stirs and do not observe the pasta boiling phenomenon when vacuum hardening chamber vacuum tightness≤10Pa;
(4) open oil and stir, oil continues to vacuumize the quenching chamber vacuum when stirring, and makes vacuum hardening chamber vacustat at≤10Pa, namely finishes maintenance.
Temperature required in the quenching oil servicing operations is 40-70 ℃.
The timed interval that intermittent type oil stirs is 1-2 second.
The maintenance procedure of a kind of vacuum quenching oil of the present invention has following beneficial effect and characteristics: utilize the residual temperature of quenching oil not heat in the vacuum quencher blowing out temperature-fall period or heating in short-term can reach required temperature 40-70 ℃ of quenching oil maintenance; The furnace shutting down process of whole quenching oil servicing operations and vacuum quencher combines together, the blowing out temperature-fall period of vacuum quencher generally needs 2-5h, carry out the degassing of vacuum quenching oil with present method, then each degassing operation only needs 10-15min, do not need again every the first quarter or half a year separately to the quenching oil processing that once outgases, reduced the regular degassing and handled equipment, manpower and the energy dissipation that causes; Whether initial stage intermittent type oil stirs the observation quenching oil and seethes with excitement, and the initial stage that prevents, direct unlatching oil stirred the phenomenon generation that quenching oil is acutely rolled and overflow oil groove, makes operation safe because of quenching gas content of oil height; Use technical scheme of the present invention when each quenching furnance blowing out to the vacuum quenching oil processing that outgases fast, can make vacuum quenching oil remain on good use state always, the component steady quality of every batch processed, surface-brightening, and the work-ing life that can also improve vacuum quenching oil.
Embodiment
Below in conjunction with embodiment technical scheme of the present invention is described further.
Embodiment 1
The maintenance procedure of a kind of vacuum quenching oil of present embodiment, its concrete operations step is as follows:
(1) closes fire door after the vacuum quencher operation, behind the shackle, vacuumize the quenching chamber vacuum to vacuum tightness≤10Pa with vacuum pump, utilize the post-job surplus temperature of vacuum quencher to keep the quenching oil temperature at 40-50 ℃;
(2) whether carry out once oil stirring second every 1-2, observing the quenching pasta by vision slit has boiling phenomenon;
(3) observe the boiling of quenching pasta, stopping oil stirring, continue to be evacuated to vacuum hardening chamber vacuum tightness≤10Pa, the intermittent type of repeating vacuum quenching chamber oil stirs and is evacuated to vacuum tightness≤10Pa, and intermittent type oil stirs and do not observe the pasta boiling phenomenon when vacuum hardening chamber vacuum tightness≤10Pa;
(4) open oil and stir, oil continues to vacuumize the quenching chamber vacuum when stirring, and makes vacuum hardening chamber vacustat at≤10Pa, namely finishes maintenance.
Embodiment 2
The maintenance procedure of a kind of vacuum quenching oil of present embodiment, its concrete operations step is as follows:
(1) closes fire door after the vacuum quencher operation, behind the shackle, vacuumize the quenching chamber vacuum to vacuum tightness≤10Pa with vacuum pump, utilize the post-job surplus temperature of vacuum quencher and heating, make the quenching oil temperature maintenance at 60-70 ℃;
(2) whether carry out once oil stirring second every 1-2, observing the quenching pasta by vision slit has boiling phenomenon;
(3) observe the boiling of quenching pasta, stopping oil stirring, continue to be evacuated to vacuum hardening chamber vacuum tightness≤10Pa, the intermittent type of repeating vacuum quenching chamber oil stirs and is evacuated to vacuum tightness≤10Pa, and intermittent type oil stirs and do not observe the pasta boiling phenomenon when vacuum hardening chamber vacuum tightness≤10Pa;
(4) open oil and stir, oil continues to vacuumize the quenching chamber vacuum when stirring, and makes vacuum hardening chamber vacustat at≤10Pa, namely finishes maintenance.
Compare with the vacuum quenching oil of handling that regularly outgases, technical scheme of the present invention is maintained to handle to vacuum quenching oil and is made the vacuum hardening life of oil prolong 1/2; Use technical scheme of the present invention to quenching oil outgas do not need again every the first quarter or half a year separately to the quenching oil processing that once outgases; Compare with routine degassing operation, the vacuum quenching oil of the technical program degassing remains on good use state always, and the product disqualification rate is reduced significantly.
Claims (3)
1. the maintenance procedure of a vacuum quenching oil is characterized in that, the concrete operations step is as follows:
(1) the vacuum hardening chamber is vacuumized, make vacuum hardening chamber vacuum tightness≤10Pa;
(2) intermittent type carries out the oil stirring, and whether observe the quenching pasta has boiling phenomenon;
(3) observe the boiling of quenching pasta, stopping oil stirring, continue to be evacuated to vacuum hardening chamber vacuum tightness≤10Pa, the intermittent type of repeating vacuum quenching chamber oil stirs and is evacuated to vacuum tightness≤10Pa, and intermittent type oil stirs and do not observe the pasta boiling phenomenon when vacuum hardening chamber vacuum tightness≤10Pa;
(4) open oil and stir, oil continues to vacuumize the quenching chamber vacuum when stirring, and makes vacuum hardening chamber vacustat at≤10Pa, namely finishes maintenance.
2. the maintenance procedure of a kind of vacuum quenching oil according to claim 1 is characterized in that, temperature required in the quenching oil servicing operations is 40-70 ℃.
3. the maintenance procedure of a kind of vacuum quenching oil according to claim 1 is characterized in that, the timed interval that intermittent type oil stirs is 1-2 second.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310102885.1A CN103205542B (en) | 2013-03-27 | 2013-03-27 | Maintenance method of vacuum quenching oil |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310102885.1A CN103205542B (en) | 2013-03-27 | 2013-03-27 | Maintenance method of vacuum quenching oil |
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| CN103205542A true CN103205542A (en) | 2013-07-17 |
| CN103205542B CN103205542B (en) | 2015-07-22 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5174944A (en) * | 1989-11-17 | 1992-12-29 | Waukee Engineering Company Inc. | Apparatus for separating gas from a liquid |
| CN1930309A (en) * | 2004-03-10 | 2007-03-14 | 出光兴产株式会社 | Quenching oil for pressure reduction quenching and quenching method |
| CN102462978A (en) * | 2011-07-12 | 2012-05-23 | 常州贺斯特电气有限公司 | Combined type degassing technology for vacuum oil filter |
| CN202516352U (en) * | 2012-05-07 | 2012-11-07 | 齐齐哈尔科诺科技有限公司 | Foam eliminating device for vacuum absolute oil |
-
2013
- 2013-03-27 CN CN201310102885.1A patent/CN103205542B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5174944A (en) * | 1989-11-17 | 1992-12-29 | Waukee Engineering Company Inc. | Apparatus for separating gas from a liquid |
| CN1930309A (en) * | 2004-03-10 | 2007-03-14 | 出光兴产株式会社 | Quenching oil for pressure reduction quenching and quenching method |
| CN102462978A (en) * | 2011-07-12 | 2012-05-23 | 常州贺斯特电气有限公司 | Combined type degassing technology for vacuum oil filter |
| CN202516352U (en) * | 2012-05-07 | 2012-11-07 | 齐齐哈尔科诺科技有限公司 | Foam eliminating device for vacuum absolute oil |
Non-Patent Citations (2)
| Title |
|---|
| 《金属热处理》 20131231 关晓燕等 "去除淬火油中水分方法的研究" 第50-53页 1-3 第28卷, 第12期 * |
| 关晓燕等: ""去除淬火油中水分方法的研究"", 《金属热处理》 * |
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