CN105486710A - Quenching sample and design method thereof - Google Patents
Quenching sample and design method thereof Download PDFInfo
- Publication number
- CN105486710A CN105486710A CN201410479491.2A CN201410479491A CN105486710A CN 105486710 A CN105486710 A CN 105486710A CN 201410479491 A CN201410479491 A CN 201410479491A CN 105486710 A CN105486710 A CN 105486710A
- Authority
- CN
- China
- Prior art keywords
- sample
- end stand
- temperature
- interlude
- quenching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The invention relates to a quenching sample and a design method thereof. The quenching sample is in a dumbbell shape which is characterized in that two ends are thick and an intermediate part is fine, the quenching sample is formed by the intermediate part and two symmetrical end platforms at the two ends, the intermediate part and the end platforms are in cylinder shape, and the length of the intermediate part is longer than total length of two end platforms. A heating temperature delta T2 of the sample is designed as 900-1100 DEG C, and the temperature delta T1 of the end platform is controlled between 300-500 DEG C. According to the method, the length L of the intermediate part, a diameter d and a length l of the end platform can be determined. A sectional area S1 of the end platform can be calculated according to a formula in a description, the diameter D of the end platform can be obtained, so that the quenching sample can be produced. According to the invention, when the sample is heated to high temperature, the temperature of the end part is low, a temperature difference value between the intermediate part and two ends of the sample can be determined by changing a ratio of cross-sectional areas of the intermediate part to two ends, so that the sample is conveniently separated, and subsequent rapid quenching operation is conveniently carried out, and test precision can be increased.
Description
Technical field
The invention belongs to inspection chemical examination field, be specifically related to a kind of heat simulating tester quenching simulation sample used and method for designing thereof.
Background technology
Heat simulating tester can reproduce the multiple Physical Metallurgy process of material, is a kind of effective Multi-functional analog testing machine, is applied widely in iron and steel enterprise, colleges and universities and scientific research institutions.Apply this testing machine research material when the tissue morphology of the condition of high temperature, usually adopt quench method.At present, heat simulating tester quenching simulation used sample is generally cylindric, and the process for quenching of employing mainly contains two kinds.A kind of process for quenching is that the method does not have particular/special requirement to selecting the specification of sample directly to simulation sample water spray, but application heat simulating tester realizes this method can cause some adverse consequencess.As, with the hammering block hardening crack of simulation sample contacts, increase difficulty etc. to the maintenance of the follow-up cleaning of test and equipment.Therefore, not easily the method is adopted.Another kind of process for quenching is proposed by " a kind of test method of compression sample being carried out to shrend rapidly " (application number is 201110192682.7).The method is under quenching temperature, and simulation sample takes out and puts into water to reach the object of quenching by application nose pliers.The sample of this method selection is common cylindric, does not also propose the requirement to size of sample.Although the method solves, sample is directly sprayed water caused adverse consequences, but do not provide sample in sampling process and be difficult to the situation of taking off, because the heating of test is heated sample direct-electrifying, the anvil head directly contacted with sample is heating electrode, this can cause sample to be difficult to be separated with anvil head, and this phenomenon occurs, and temperature will decline when sampling, miss best quenching opportunity, have a strong impact on test accuracy and test effect.
For under heated condition, sample and anvil head are difficult to the problem be separated, and propose a kind of quenching sample design method and sample thereof.Conventional examples cross section is identical everywhere, when heating, the temperature at sample two ends and the heating-up temperature at center are more or less the same, cause sample and anvil head to be difficult to when being heated to uniform temperature depart from, but can, by changing simulation specimen cross section, make sample two ends temperature and central temperature produce larger difference, the temperature of sample center can be made higher, two ends temperature is lower, is more conducive to the disengaging of sample and anvil head so at low temperatures, thus hardening step of being more convenient for.
Summary of the invention
The object of the invention is to propose a kind of quenching sample design method and sample thereof, by sample design being become the method that axially upper section is not identical, the temperature at sample two ends is reduced, be beneficial to the disengaging of sample and anvil head, so that follow-up rapid quenching operation, improve test accuracy.
For this reason, the solution that the present invention takes is:
A kind of quenching sample, is characterized in that, described quenching sample is thick, middle thin " dumbbell " shape in two, and be made up of two end stand of interlude and two ends symmetry, interlude and end stand shape are right cylinder, and interlude length is greater than the total length of two end stand.
Quench the method for designing of sample, its concrete grammar and step are:
1, sample and end stand heating-up temperature are determined: sample heating-up temperature △ T
2be 900 ~ 1100 DEG C, end stand temperature △ T
1control at 300 DEG C ~ 500 DEG C.
2, sample basic size is determined: pre-determine interlude length L, diameter d and end stand length l.
3, end stand diameter D is calculated: according to formula:
calculate end stand sectional area S
1, in formula: μ
1for end stand thermal loss coefficient, span is 0.25 ~ 0.35; μ
2for interlude thermal loss coefficient, span is 0.30 ~ 0.50; S
1for interlude sectional area; S
2for end stand sectional area.
According to the end stand sectional area S calculated
1, end stand diameter D can be obtained, and then obtain the concrete numerical value of D/d, and produce quenching sample accordingly.
Its design considerations is:
Owing to being directly to sample electrified regulation, the characteristics of heat transfer of sample is that axial heat inputs identical.During heating, the temperature contrast at sample two ends and middle part can be adjusted by thermal loss, if thermal loss is constant, then can be adjusted by the resistance value and quality characteristic value adjusting sample.During sample heating, the rising of temperature is relevant with quality with the resistance value of sample, and the resistance value of sample is determined by the length of sample, cross-sectional area and resistivity, and the quality of sample is again by the length of sample, cross-sectional area and density decision.The cross-sectional area design sample two ends of sample and the temperature of interlude is utilized to raise, the two ends of sample are designed to sectional area is large and midsection is amassed little, to make the two ends temperature of sample lower than interlude temperature, therefore become by sample design both sides thick, middle thin " dumbbell shaped ".The part temperature rise large due to sample cross area is little, and the part temperature rise that cross-sectional area is little is large, and therefore namely choose reasonable sample interlude and two ends cross-sectional area ratio become the core of sample design.And choosing of sample interlude and two ends cross-sectional area ratio, and the two ends of adjusting sample and medium temperature difference can be needed to determine according to the loss of sample heat.The end of sample and the thermal loss of interlude are with to contact the anvil head of sample, testing machine and experimental enviroment relevant.Sample end region temperature is low, and thermal loss affects by heat transfer and radiation two kinds of modes, thermal loss coefficient μ
1usually in 0.25 ~ 0.35 scope; The interlude temperature of sample is high, thermal loss based on heat radiation, thermal loss coefficient μ
2usually in 0.30 ~ 0.50 scope.
Beneficial effect of the present invention is:
The present invention is by becoming thick, the middle thin shape in two ends by sample design, sample can be made when centre heating higher temperature, end region temperature is still lower, and can determine with the ratio of two ends cross-sectional area by changing in the middle of sample with the temperature gap at its two ends in the middle of sample, the temperature at sample two ends is reduced, under low-temperature condition, the disengaging of sample of being more convenient for, and be beneficial to follow-up rapid quenching operation, improve test accuracy.
Accompanying drawing explanation
Fig. 1 is quenching sample front view;
Fig. 2 is quenching sample left view.
In figure: end stand 1, interlude 2.
Embodiment
From accompanying drawing, the present invention's sample that quenches is thick, middle thin " dumbbell " shape in two, be made up of two end stand 1 of interlude 2 and two ends symmetry, interlude 2 is circle with the section configuration of end stand 1, and the length of interlude 2 is greater than the total length of two end stand 1.
Below in conjunction with embodiment, the quench method for designing of sample of the present invention is illustrated.
Embodiment 1:
End stand 1, interlude 2 shape of cross section of designed sample are circle, and the temperature of sample end controls at 500 DEG C.End stand 1 basal diameter is D.
Sample is heated to 1000 DEG C, is incubated 3 minutes, then carries out quenching test.When end stand 1 temperature is 500 DEG C, sample easily departs from.Interlude 2 length L is 6mm, diameter d is 6mm; End stand 1 total length l is 2mm, μ
1=0.35, μ
2=0.50, according to formula
calculate, D/d=1.27, then: D=7.62mm.
Embodiment 2:
End stand 1, interlude 2 shape of cross section of designed sample are circle, and the temperature of sample end controls at 300 DEG C.End stand 1 basal diameter is D.
Sample is heated to 900 DEG C, is incubated 3 minutes, then carries out quenching test.When end stand 1 temperature is 300 DEG C, sample easily departs from.Interlude 2 length L is 15mm, diameter d is 10mm; End stand 1 total length l is 5mm, μ
1=0.25, μ
2=0.30, according to formula
calculate, D/d=1.34, then: D=13.4mm.
Embodiment 3:
End stand 1, interlude 2 shape of cross section of designed sample are circle, and the temperature of sample end controls at 500 DEG C.End stand 1 basal diameter is D.
Sample is heated to 900 DEG C, is incubated 3 minutes, then carries out quenching test.When end stand 1 temperature is 500 DEG C, sample easily departs from.Interlude 2 length L is 6mm, diameter d is 6mm; End stand 1 total length l is 2mm, μ
1=0.35, μ
2=0.45, according to formula
calculate, D/d=1.18, then: D=7.1mm.
Claims (2)
1. quench a sample, it is characterized in that, described quenching sample is thick, middle thin " dumbbell " shape in two, and be made up of two end stand of interlude and two ends symmetry, interlude and end stand shape are right cylinder, and interlude length is greater than the total length of two end stand.
2. quench as claimed in claim 1 the method for designing of sample, it is characterized in that, concrete grammar and step are:
(1) sample and end stand heating-up temperature are determined: sample heating-up temperature △ T
2be 900 ~ 1100 DEG C, end stand temperature △ T
1control at 300 DEG C ~ 500 DEG C;
(2) sample basic size is determined: pre-determine interlude length L, diameter d and end stand length l;
(3) end stand diameter D is calculated: according to formula:
calculate end stand sectional area S
1, in formula: μ
1for end stand thermal loss coefficient, span is 0.25 ~ 0.35; μ
2for interlude thermal loss coefficient, span is 0.30 ~ 0.50; S
1for interlude sectional area; S
2for end stand sectional area;
According to the end stand sectional area S calculated
1, end stand diameter D can be obtained, and then obtain the concrete numerical value of D/d, and produce quenching sample accordingly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410479491.2A CN105486710B (en) | 2014-09-19 | 2014-09-19 | One kind quenching sample and its design method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410479491.2A CN105486710B (en) | 2014-09-19 | 2014-09-19 | One kind quenching sample and its design method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105486710A true CN105486710A (en) | 2016-04-13 |
| CN105486710B CN105486710B (en) | 2018-02-27 |
Family
ID=55673829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410479491.2A Active CN105486710B (en) | 2014-09-19 | 2014-09-19 | One kind quenching sample and its design method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105486710B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6238087B1 (en) * | 1999-07-13 | 2001-05-29 | Caterpillar Inc. | Method and apparatus for characterizing a quench |
| CN201021918Y (en) * | 2007-02-12 | 2008-02-13 | 上海梅山钢铁股份有限公司 | A sampling emergent cooling device for thermal simulation tester |
| CN202676535U (en) * | 2012-06-20 | 2013-01-16 | 鞍钢股份有限公司 | Anvils for quenching thermal simulation test piece |
| CN202903708U (en) * | 2012-10-20 | 2013-04-24 | 江阴兴澄特种钢铁有限公司 | Martensite point isothermal quenching measuring equipment of steel |
-
2014
- 2014-09-19 CN CN201410479491.2A patent/CN105486710B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6238087B1 (en) * | 1999-07-13 | 2001-05-29 | Caterpillar Inc. | Method and apparatus for characterizing a quench |
| CN201021918Y (en) * | 2007-02-12 | 2008-02-13 | 上海梅山钢铁股份有限公司 | A sampling emergent cooling device for thermal simulation tester |
| CN202676535U (en) * | 2012-06-20 | 2013-01-16 | 鞍钢股份有限公司 | Anvils for quenching thermal simulation test piece |
| CN202903708U (en) * | 2012-10-20 | 2013-04-24 | 江阴兴澄特种钢铁有限公司 | Martensite point isothermal quenching measuring equipment of steel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105486710B (en) | 2018-02-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106525563B (en) | A kind of thermo dynamic analogy method of high-strength vehicle steel impact specimen thermomechanical treatment | |
| CN103849746A (en) | Thermal treatment process for 40CrNiMoA core rod and 40CrNiMoA core rod obtained through process | |
| CN105181734A (en) | Shape memory alloy thermal mechanical fatigue test device | |
| CN101788438B (en) | Experimental method for measuring harden ability of large-sized aluminium alloy | |
| CN110595907B (en) | Method for improving accuracy of uniaxial hot compression test | |
| CN105543459B (en) | A kind of compound process for quenching of Cr12MoV rolls | |
| CN204924996U (en) | Hot fatigue testing machine of roll | |
| CN205049504U (en) | Shape memory alloy thermal mechanical fatigue experimental apparatus | |
| CN104294020B (en) | A kind of for the hot stamping device controlled that quenches | |
| CN105486710A (en) | Quenching sample and design method thereof | |
| CN102787223B (en) | Metal material end surface quenching test machine | |
| CN108279718B (en) | High-flux forging heat control method | |
| CN106769596B (en) | A kind of roll laser thermal shock test method | |
| CN102492818B (en) | Thermal treatment process for inlaid steel guide rail | |
| CN103752746B (en) | Manufacturing method of pressure head used on thermal force simulation testing machine | |
| CN109929969A (en) | A kind of optimization method of steel alloy water quenching technology | |
| CN106244773B (en) | A kind of prediction technique of P92 tempers hardness | |
| CN105112625B (en) | A kind of manufacture method of pressurized-water reactor nuclear power plant shielding impeller of pump forging | |
| Li et al. | Effect of EDM conditions on surface residual stress of Cr12MoV steel | |
| CN103836914B (en) | The syndeton of a kind of vacuum sintering funace thermode and oil hydraulic cylinder piston head | |
| CN109536696A (en) | A kind of tempering process of New Type of Cold Roller | |
| CN204183959U (en) | A kind of surface hardening structure of large-diameter cylinder body class workpiece | |
| CN105202930B (en) | The vacuum induction melting furnace and its quenching implementation method of quenching function can be realized | |
| CN103740918B (en) | For the heat treating method of the hollow core rod of Continuous mill train | |
| CN107881443A (en) | A kind of high-entropy alloy squeezes pier composite modification technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |