CN102653819A - Control method of water-soluble quenching medium used for large-specification high-strength bolt in wind power generation - Google Patents
Control method of water-soluble quenching medium used for large-specification high-strength bolt in wind power generation Download PDFInfo
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- CN102653819A CN102653819A CN2011100514745A CN201110051474A CN102653819A CN 102653819 A CN102653819 A CN 102653819A CN 2011100514745 A CN2011100514745 A CN 2011100514745A CN 201110051474 A CN201110051474 A CN 201110051474A CN 102653819 A CN102653819 A CN 102653819A
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Abstract
The invention relates to a control method of a water-soluble quenching medium used for a large-specification high-strength bolt in wind power generation. The control method is realized through the following steps: periodically measuring the cooling speed of the water-soluble quenching medium; controlling the high-temperature cooling speed Vmax of the water-soluble quenching medium to within 120-180 DEG C and the cooling speed at 300 DEG C V300 to within 40-90 DEG C; and preparing new liquid to be supplemented according to measuring results. The control method has the beneficial effect of ensuring the quenching quality of the large-specification (M42-M64) high-strength bolt in wind power generation.
Description
Technical field
The present invention relates to a kind of quenchant, relate in particular to a kind of control method of quenchant.
Background technology
(M42～M64) high strength bolt obtains the martensite more than 90% after requiring to quench to the big specification of wind-power electricity generation, and back hardness >=HRC48 quenches.Domestic many factories as quenchant, to middle-size and small-size steel alloy part, can reach certain quenching purpose with machinery oil.But for big specification alloy steel piece, surface hardness is very low behind the quenching oil quenching, is thinning microstructure in a sense, and what do not reach this steel should have hardness at all, and quenches and do not pass through, and basic reason is that the cooling power of oil is little.Use oil-quenched loss big simultaneously, produce smog, contaminate environment, even ignition hazard is arranged, cause unnecessary loss.And use water quenching, cooling power is too strong again, can cause distorting excessive even cracking.
Select water-soluble quenching medium for use,, can obtain cooling poweies different from water to oil through control to concentration, temperature and stirring extent.The concentration of water-soluble quenching medium in water is low more; Speed of cooling is just fast more; So the concentration of control water-soluble quenching medium in water can satisfy carbon steel (small articles), soft steel structural low such as 20Cr, 20CrMo, 20CrMnTi; In the quench cooled of steel parts such as carbon and low-alloy structural steel such as 40Cr, 42CrMo, 30CrMo, 35CrMo, and the quench cooled of high quality steel such as 1Cr13,2Cr13.In water, add suitable its speed of cooling of quenchant and be 2～2.5 times of quenching oil, the surface hardness and the case depth of steel are more much bigger than oil quenching, the interior tissue of steel also than the oil quenching refinement many.
Water-soluble quenching medium is a high molecular polymer, dissolves each other with water and separates, and solvability is very high, the solution in water after the dissolving; Stable in properties, it is aging to undergo no deterioration, and can not precipitate; Tasteless during quench cooled, no flue gas, the quenching work-yard is clean; Workpiece non-corrosive after quenching does not have flue gas and produces during tempering, Working environment obtains very big improvement.At present, the application of water-soluble quenching medium is very extensive, relates to the container manufacturing, the thermal treatment of petroleum machinery and locomotive manufacturing etc.
The cost of the water-soluble quenching medium after preparing be quenching oil 1/4th in addition still less, loss also than quenching oil lack many.The parts quenching Heating temperature is usually than low 10～30 ℃ of oil quenching temperature.The great advantage of water-soluble quenching medium is that quenching effect is better than quenching oil, with low cost, durable in use, and environment is clean and tidy, receives factory and workman operator's welcome deeply.
Though water-soluble quenching medium has lot of advantages, it is responsive to concentration ratio, the working concentration narrow range, be generally ± 1%, require the concentration of testing liquid frequently, and regularly proofread concentration factor.Adopt hand-held pol refractometer to measure the percentage concentration of working fluid; But after working fluid is polluted; It is high that the concentration ratio actual concentrations of testing is wanted, and concentration factor must will use the method for kinematic viscosity to revise to little adjustment in direction; Perhaps revise with the cooling performance testing method, more loaded down with trivial details.Along with the prolongation of duration of service, workpiece is taken away a part of quenchant, and the moisture in the medium also can evaporate a part, so how to control the concentration of water-soluble quenching medium, and making just becomes a difficult problem in its use range that remains on regulation.
To this problem, the way that solves usually is regular replenishment mother liquor and water, and concentration of medium is controlled in certain concentration range, is controlled like this in the short period of time.Time is when long, and the decomposition of water-soluble quenching medium macromolecular chain and the introducing of impurity all can influence the actual concentration of quenchant.
Summary of the invention
The technical issues that need to address of the present invention have provided the control method of a kind of wind-power electricity generation large-size high-tensile degree bolt with water-soluble quenching medium, are intended to solve the above problems.
In order to solve the problems of the technologies described above, the present invention realizes through following steps:
The speed of cooling of periodic measurement water-soluble quenching medium;
The high temperature cooling rate V of control water-soluble quenching medium
MaxIn 120～180 ℃/S scope, the speed of cooling V in the time of 300 ℃
300In 40～90 ℃/S scope;
The new liquid additional according to measuring result preparation needs.
Compared with prior art, the invention has the beneficial effects as follows: guaranteed the big specification of wind-power electricity generation (the quenching quality of high strength bolt of M42～M64).
Description of drawings
Fig. 1 is a water-soluble quenching medium cooling performance graphic representation.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:
The present invention realizes through following steps:
The speed of cooling of periodic measurement water-soluble quenching medium;
The high temperature cooling rate V of control water-soluble quenching medium
MaxIn 120～180 ℃/S scope, the speed of cooling V in the time of 300 ℃
300In 40～90 ℃/S scope;
The new liquid additional according to measuring result preparation needs.
When new water distribution dissolubility quenchant, adopt saccharometer to measure concentration; After the use; Just adopt the portable heat-eliminating medium performance detector of KHR to measure its speed of cooling, guarantee the quality of quenching through controlled chilling speed, speed of cooling that so how to control quenchant just becomes key.
Control method of the present invention is the speed of cooling of periodic measurement water-soluble quenching medium, the new liquid that replenishes according to measuring result preparation needs then, the high temperature cooling rate V of control water-soluble quenching medium
MaxIn 120～180 ℃/S scope, the speed of cooling V in the time of 300 ℃
300In 40～90 ℃/S scope, its cooling performance curve is as shown in Figure 1, and bolt specification is big more, and the speed of cooling of quenchant should be fast more.The method of replenishing new liquid is: the capacity of preparing a special use on the quenching tank next door is 2000m
3Indicate graduated container, the container bottom side is provided with a gate-controlled switch.New liquid with the desire preparation prepares in the container of special use earlier; Stir; Join the exit of quenchant groove then through gate-controlled switch with certain speed; Cooperate whisking appliance in the quenching tank just can guarantee the whole uniformity of quenchant concentration so again, avoided the fluctuation of quenching quality, thereby guaranteed the big specification of wind-power electricity generation (the quenching quality of high strength bolt of M42～M64).
Claims (1)
1. a wind-power electricity generation large-size high-tensile degree bolt is realized through following steps with the control method of water-soluble quenching medium:
The speed of cooling of periodic measurement water-soluble quenching medium;
The high temperature cooling rate V of control water-soluble quenching medium
MaxIn 120～180 ℃/S scope, the speed of cooling V in the time of 300 ℃
300In 40～90 ℃/S scope;
The new liquid additional according to measuring result preparation needs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100514745A CN102653819A (en) | 2011-03-03 | 2011-03-03 | Control method of water-soluble quenching medium used for large-specification high-strength bolt in wind power generation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100514745A CN102653819A (en) | 2011-03-03 | 2011-03-03 | Control method of water-soluble quenching medium used for large-specification high-strength bolt in wind power generation |
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| CN102653819A true CN102653819A (en) | 2012-09-05 |
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| CN2011100514745A Pending CN102653819A (en) | 2011-03-03 | 2011-03-03 | Control method of water-soluble quenching medium used for large-specification high-strength bolt in wind power generation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104129431A (en) * | 2014-07-15 | 2014-11-05 | 汤荣民 | Automotive chassis fixing seat and heat treatment technology thereof |
| CN105183022A (en) * | 2015-10-10 | 2015-12-23 | 十堰双齐科技有限公司 | Method for controlling PAG water base quenchant field concentration |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101660027A (en) * | 2008-08-29 | 2010-03-03 | 中国石油天然气股份有限公司 | Water soluble polyether quenching medium |
-
2011
- 2011-03-03 CN CN2011100514745A patent/CN102653819A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101660027A (en) * | 2008-08-29 | 2010-03-03 | 中国石油天然气股份有限公司 | Water soluble polyether quenching medium |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104129431A (en) * | 2014-07-15 | 2014-11-05 | 汤荣民 | Automotive chassis fixing seat and heat treatment technology thereof |
| CN105183022A (en) * | 2015-10-10 | 2015-12-23 | 十堰双齐科技有限公司 | Method for controlling PAG water base quenchant field concentration |
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Application publication date: 20120905 |