CN104374659A - Method for checking hardness of cold-drawing and cold-heading state high-temperature alloy wire material - Google Patents
Method for checking hardness of cold-drawing and cold-heading state high-temperature alloy wire material Download PDFInfo
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- CN104374659A CN104374659A CN201410642137.7A CN201410642137A CN104374659A CN 104374659 A CN104374659 A CN 104374659A CN 201410642137 A CN201410642137 A CN 201410642137A CN 104374659 A CN104374659 A CN 104374659A
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Abstract
The invention provides a method for checking the hardness of a cold-drawing and cold-heading state high-temperature alloy wire material. The method comprises the following steps: firstly, washing and airing a sample obtained from a to-be-detected workpiece; secondly, putting the washed and aired sample in a vacuum furnace for solid dissolving treatment; thirdly, selecting the flat part of the sample which is subjected to solid dissolving treatment as a hardness checking position, and mounting the sample by adopting dental base acrylic resin powder; fourthly, grinding and polishing the hardness checking position of the workpiece sample; fifthly, detecting microhardness of the sample by using pressure of a Vickers hardness machine with capacity of 5Kg; and sixthly, checking whether the hardness detecting result of the sample is less than or equal to 152HV or not. 152HV is the industrial hardness standard in the industry of cold-drawing and cold-heading state high-temperature alloy wire materials, the material is qualified if the value of hardness meets the standard and is not qualified if not. According to the method, whether the finally tested hardness value is qualified or not can be determined by detecting whether the single microhardness is qualified or not, the working intensity of hardness testing can be reduced, and the working efficiency can be improved.
Description
Technical field
The present invention relates to high temperature alloy silk material processing technology field, be specifically related to a kind of cold drawn hardness test method adding cold pier state high temperature alloy silk material.
Background technology
Cold drawnly add the material that cold pier state high temperature alloy silk material is a kind of superhigh intensity, be widely used in aeromotor.Prior art check cold drawn add cold pier state high temperature alloy silk material time, the load that microhardness adopts is 0.1Kg, but complete after to doubly single and the inspection of double microhardness, the hardness of workpiece still cannot meet the demands, need carry out process of doing over again, after process of doing over again, the load of hardness test still adopts 0.1Kg, and the hardness of workpiece can only be scrape through, all the time be in borderline pass state, and process control does not with great difficulty cause scrapping of workpiece.
Analyze existing microhardness inspection method, mainly have the following disadvantages:
1. the workpiece of existing inspection method generally carries out solution treatment in common electric furnace, and easily produce oxide skin in metal surface, this adds the error of hardness test to a certain extent;
2. existing microhardness inspection method, workpiece is directly fixed on frock clamp, and the hardness of silk material is easily subject to the impact of frock clamp clamping stability, and under the impact of test load, the workpiece be fixed on frock clamp still likely produces and rocks, and easily causes the distortion of hardness number;
3. existing hardness measuring method need through doubly single and double microhardness inspection, and must after list be doubly all qualified with double microhardness, could judge that the hardness number of final test is as qualified, once the hardness of material is defective, the process of doing over again of material need be carried out, work period is long, inefficiency.
The number of processes of doing over again of industry standard regulation high temperature alloy can not more than 3 times, process of doing over again repeatedly not only increases the pressure of work electric furnace, and virtually add the cost of work pieces process, reduce production efficiency, extend the production cycle, more seriously, the solution treatment of repeatedly doing over again of material can cause the reduction of material property.
Therefore existing method seriously constrains the mass production requirement of workpiece, and the process of back and forth doing over again of material affects the normal payment of workpiece, and the scientific research and development task affecting engine completes on schedule.
Summary of the invention
The object of the invention is to for above-mentioned the problems of the prior art, provide one actually can reflect workpiece hardness, shorten the process-cycle, improve working (machining) efficiency, the hardness test method of the high temperature alloy silk material cut down finished cost.
To achieve these goals, the technical solution used in the present invention comprises the steps:
The first step, materialses from workpiece for measurement and carries out cleaning and drying;
Second step, the workpiece sample after cleaning being dried is placed and is carried out solution treatment in a vacuum furnace;
3rd step, the workpiece sample after solution treatment is chosen smooth place as hardness test position, and carries out edge sample to workpiece sample;
4th step, carries out sanding and polishing process to the hardness test position of workpiece sample;
5th step, the pressure using Vickers hardness machine to select load to be 5Kg carries out microsclerometry to sample;
6th step, check the Determination of Hardness result of sample whether≤152HV, described 152HV cold drawnly add cold pier state high temperature alloy silk material industry hardness standard, if measurement result meet namely qualified, otherwise then defective.
Described workpiece for measurement cleaning adopts aviation gasoline or acetone.
In the 3rd described step, the condition of solution treatment is: be heated to 1055 ~ 1075 DEG C, and insulation 60min, argon gas cools.
Described workpiece sample adopts dental base acrylic resin powder to carry out edge sample.
Described sample position sanding and polishing process comprises: first polish successively from coarse to fine, then carry out polishing by buffing machine to sample position.
Described Vickers hardness machine equipment parameter is: useful load scope is 5Kg ~ 30Kg, can read rhombus diagonal line check result.
Compared with prior art, the present invention has following beneficial effect:
1. the present invention's cleaning dry after workpiece sample place and carry out solution treatment in a vacuum furnace, avoid the generation of workpiece sample oxidation on metal surface skin, when having stopped to check microhardness, material surface oxide skin is to the interference of hardness number.
2. the present invention adopts the microhardness of the method test material of edge sample, by carrying out edge sample to the workpiece sample after solution treatment, can avoid the unstable impact produced testing material hardness of the clamping of frock clamp in original method.
It is 3. cold drawn that to add cold pier state high temperature alloy silk material be the material that a kind of microhardness is very large, after the cold pier process of material, outer surface of workpiece easily forms the hardened layer of one deck densification, therefore measure cold drawn add the microhardness of cold pier high temperature alloy silk material time, if the load selected is too small, easily cause in hardness test process, microhardness testers pressure head does not really press the matrix material contacting workpiece, but only act on cementation zone, so measure microhardness out and fail to reflect real material hardness.The present invention is after workpiece edge sample, load is selected to be that the pressure of 5Kg carries out microsclerometry to sample, single microhardness inspection doubly only need be carried out after adjustment, by measuring, namely whether single times of microhardness is qualified can judge that whether final tested for hardness value is qualified, significantly reduce the working strength of hardness test, improve work efficiency.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail.
Embodiment 1, adds cold pier state high temperature alloy silk material carry out hardness test to cold drawn as follows:
1. the cleaning of workpiece: materials from workpiece for measurement and to clean with aviation gasoline or acetone and to dry;
2. solution treatment: the sample after cleaning being dried is placed in a vacuum furnace, is heated to 1055 DEG C, insulation 60min, argon gas cools, and completes solution treatment.
3. sample edge sample: choose the smooth place of the sample after solution treatment as hardness test position, adopts dental base acrylic resin powder to carry out edge sample to sample.
4. the sanding and polishing process of sample: first select sand paper from coarse to fine to polish successively, then carry out polishing on buffing machine, make the hardness test surface of position of workpiece sample brighter smooth.
5. Determination of Hardness: select useful load scope to be 5Kg ~ 30Kg, the Vickers hardness machine of rhombus diagonal line check result can be read; Vickers hardness machine is selected load be that the pressure of 5Kg carries out microsclerometry.
6. check judgement: check the Determination of Hardness result of sample whether≤152HV, 152HV cold drawnly add cold pier state high temperature alloy silk material industry hardness standard, if hardness number meet namely qualified, otherwise then defective.
Embodiment 2, adds cold pier state high temperature alloy silk material carry out hardness test to cold drawn as follows:
1. the cleaning of workpiece: materials from workpiece for measurement and to clean with aviation gasoline or acetone and to dry;
2. solution treatment: the sample after cleaning being dried is placed in a vacuum furnace, is heated to 1065 DEG C, insulation 60min, argon gas cools, and completes solution treatment.
3. sample edge sample: choose the smooth place of the sample after solution treatment as hardness test position, adopts dental base acrylic resin powder to carry out edge sample to sample.
4. the sanding and polishing process of sample: first select sand paper from coarse to fine to polish successively, then carry out polishing on buffing machine, make the hardness test surface of position of workpiece sample brighter smooth.
5. Determination of Hardness: select useful load scope to be 5Kg ~ 30Kg, the Vickers hardness machine of rhombus diagonal line check result can be read; Vickers hardness machine is selected load be that the pressure of 5Kg carries out microsclerometry.
6. check judgement: check the Determination of Hardness result of sample whether≤152HV, 152HV cold drawnly add cold pier state high temperature alloy silk material industry hardness standard, if hardness number meet namely qualified, otherwise then defective.
Embodiment 3, adds cold pier state high temperature alloy silk material carry out hardness test to cold drawn as follows:
1. the cleaning of workpiece: materials from workpiece for measurement and to clean with aviation gasoline or acetone and to dry;
2. solution treatment: the sample after cleaning being dried is placed in a vacuum furnace, is heated to 1075 DEG C, insulation 60min, argon gas cools, and completes solution treatment.
3. sample edge sample: choose the smooth place of the sample after solution treatment as hardness test position, adopts dental base acrylic resin powder to carry out edge sample to sample.
4. the sanding and polishing process of sample: first select sand paper from coarse to fine to polish successively, then carry out polishing on buffing machine, make the hardness test surface of position of workpiece sample brighter smooth.
5. Determination of Hardness: select useful load scope to be 5Kg ~ 30Kg, the Vickers hardness machine of rhombus diagonal line check result can be read; Vickers hardness machine is selected load be that the pressure of 5Kg carries out microsclerometry.
6. check judgement: check the Determination of Hardness result of sample whether≤152HV, 152HV cold drawnly add cold pier state high temperature alloy silk material industry hardness standard, if hardness number meet namely qualified, otherwise then defective.
Testing authentication: complete hardness test respectively and material hardness inspection after solution treatment of doing over again by conventional hardness inspection method and the present invention, statistics obtains result as shown in the table.
Table 1 conventional hardness inspection method and check result of the present invention contrast statistical form
In table, I group correspond to a hardness test respectively, conventional hardness inspection method and hardness test method of the present invention corresponding scheme A1 and A2 respectively, II group of hardness test that correspond to respectively after solution treatment of doing over again, conventional hardness inspection method and hardness test method of the present invention corresponding scheme A3 and A4 respectively, solution treatment parameter is: be heated to 1065 DEG C, insulation 60min, conventional hardness inspection method is air cooling, and hardness test method of the present invention adopts argon gas cooling.
Result display in table: contrast A1 and A2 scheme in I group, after the solution treatment of conventional hardness inspection method common electric furnace, workpiece adopts load to be that the hardness test result list of 0.1Kg is doubly with double all defective, and after hardness test method vacuum drying oven of the present invention solution treatment, sample employing load is that hardness test result three samples of 5Kg are all qualified; A3 and A4 scheme is contrasted in II group, the common electric furnace of conventional hardness inspection method do over again workpiece after solution treatment adopt load be the hardness test result list of 0.1Kg doubly and double all defective, and hardness test method vacuum drying oven of the present invention is done over again after solution treatment, sample edge sample adopts load to be that hardness test result three samples of 5Kg are all qualified; Therefore, judge that conventional hardness inspection method common electric furnace solution treatment workpiece is defective as the hardness test result of 0.1Kg in load, and hardness test method vacuum drying oven solution treatment sample of the present invention is that the hardness test result of 5Kg is qualified in load, and verification experimental verification shows, adopt the sample of vacuum drying oven solution treatment to adopt load to be the true hardness that hardness test method hardness test result of 5Kg can reflect material, to do over again process without the need to sample.
The present invention adopts vacuum drying oven solution treatment material after load is the hardness test method of 5Kg, workpiece actual hardness all meets standard-required, and hardness test result can reflect the true hardness of material, working (machining) efficiency is doubled, the process-cycle shortens 1/2nd, processing cost reduces one times.Meanwhile, the present invention is that other cold drawn hardness test adding cold pier state silk material workpiece provides with reference to experience.
Claims (6)
1. the cold drawn hardness test method adding cold pier state high temperature alloy silk material, is characterized in that, comprising:
The first step, materialses from workpiece for measurement and carries out cleaning and drying;
Second step, the workpiece sample after cleaning being dried is placed and is carried out solution treatment in a vacuum furnace;
3rd step, the workpiece sample after solution treatment is chosen smooth place as hardness test position, and carries out edge sample to workpiece sample;
4th step, carries out sanding and polishing process to the hardness test position of workpiece sample;
5th step, the pressure using Vickers hardness machine to select load to be 5Kg carries out microsclerometry to sample;
6th step, check the Determination of Hardness result of sample whether≤152HV, described 152HV cold drawnly add cold pier state high temperature alloy silk material industry hardness standard, if measurement result meet namely qualified, otherwise then defective.
2. the cold drawn hardness test method adding cold pier state high temperature alloy silk material according to claim 1, is characterized in that: described workpiece for measurement cleaning adopts aviation gasoline or acetone.
3. the cold drawn hardness test method adding cold pier state high temperature alloy silk material according to claim 1, it is characterized in that, in the 3rd described step, the condition of solution treatment is: be heated to 1055 ~ 1075 DEG C, and insulation 60min, argon gas cools.
4. the cold drawn hardness test method adding cold pier state high temperature alloy silk material according to claim 1, is characterized in that: described workpiece sample adopts dental base acrylic resin powder to carry out edge sample.
5. the cold drawn hardness test method adding cold pier state high temperature alloy silk material according to claim 1, it is characterized in that, described sample position sanding and polishing process comprises: first polish successively from coarse to fine, then carry out polishing by buffing machine to sample position.
6. the cold drawn hardness test method adding cold pier state high temperature alloy silk material according to claim 1, it is characterized in that, described Vickers hardness machine equipment parameter is: useful load scope is 5Kg ~ 30Kg, can read rhombus diagonal line check result.
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| CN201410642137.7A CN104374659A (en) | 2014-11-13 | 2014-11-13 | Method for checking hardness of cold-drawing and cold-heading state high-temperature alloy wire material |
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| CN101216400A (en) * | 2008-01-07 | 2008-07-09 | 重庆大学 | Magnesium-aluminum-zinc series magnesium alloy cast uniformization judgement method |
| CN102095654A (en) * | 2010-11-04 | 2011-06-15 | 西北工业大学 | Method for measuring distribution of microhardness of welded pipe |
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- 2014-11-13 CN CN201410642137.7A patent/CN104374659A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1733953A (en) * | 2004-08-11 | 2006-02-15 | 河南科技大学 | High-strength high conduction copper alloy and its preparation method |
| CN101013124A (en) * | 2007-02-09 | 2007-08-08 | 张新明 | Device and method for measuring hardenability of aluminum alloy material |
| CN101216400A (en) * | 2008-01-07 | 2008-07-09 | 重庆大学 | Magnesium-aluminum-zinc series magnesium alloy cast uniformization judgement method |
| CN102095654A (en) * | 2010-11-04 | 2011-06-15 | 西北工业大学 | Method for measuring distribution of microhardness of welded pipe |
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| 胡永强等: "热处理对定向凝固Nb-Ti--Si基超高温合金组织及显微硬度的影响", 《材料工程》 * |
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Application publication date: 20150225 |