CN104568636A - Development method of ultra-microhardness standard block - Google Patents
Development method of ultra-microhardness standard block Download PDFInfo
- Publication number
- CN104568636A CN104568636A CN201410817563.XA CN201410817563A CN104568636A CN 104568636 A CN104568636 A CN 104568636A CN 201410817563 A CN201410817563 A CN 201410817563A CN 104568636 A CN104568636 A CN 104568636A
- Authority
- CN
- China
- Prior art keywords
- hardness
- microhardness
- ultra
- block
- temperature
- 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.)
- Pending
Links
Abstract
The invention belongs to the technical field of machinery, and relates to a manufacturing method of an ultra-microhardness standard block. In the manufacturing method, E52100 bearing steel is used as a raw material of a hardness block, and has a scale range of HV0.0005-HV0.05. The manufacturing method comprises the following processes: forging, annealing, quenching, tempering, flat grinding, grinding, polishing and the like. Compared with a macroscopic microhardness block, the manufactured ultra-microhardness standard block has better uniformity, higher stability and higher working surface roughness, and a working surface and a supporting surface of the ultra-microhardness standard block do not contain rust, cracks, abrasions and scratches and other defects; the ultra-microhardness standard block manufactured by the manufacturing method not only meets requirements of regulation of metrological verification and other domestic and foreign standards, but also provides foundation and basis for researching an ultra-microhardness testing technology.
Description
Technical field
The invention belongs to field of mechanical technique, relate to a kind of method of production of ultra microhardness calibrated bolck.
Technical background
Hardness measurement specialty is with a long history, and China, by the effort of decades, has set up comparatively comprehensively hardness standard system in macrohardness field tests.The test force that also can only reach 0.4903N because the micro-hardness testing in macrohardness is minimum, be only applicable to the hardness test of large-size sample, along with the development of the materials such as the vapour deposition of modern material Surface Engineering, sputtering, ion implantation, sample itself or surface modification layer thickness more and more less.Traditional macrohardness test cannot meet this requirement, and this just can come true by the micro-hardness test only carrying out below 0.4903N test force.Want to carry out the hardness test research under small power, first just need corresponding hardness standard block as carrier, the development thus carrying out below 0.4903N ultra microhardness calibrated bolck is the first step solving micro-hardness test problem, is also the most important thing.The development of ultra microhardness calibrated bolck produces under this demand.The test force applied due to ultra microhardness belongs to small test force category, the impression produced on hardness standard block surface is very little, there is high requirement to all technical of measuring system and hardness standard block, also challenge is proposed to corresponding ultra microhardness calibrated bolck development technology.
Summary of the invention
The object of the invention is to break through prior art limitation, a kind of method of production of ultra microhardness calibrated bolck is provided.
The object of the invention is to be achieved through the following technical solutions.
A method of production for ultra microhardness calibrated bolck, is characterized in that: its operation steps comprises:
Step one, selection.Adopt bearing steel, its durometer level of dispatching from the factory is for (400,600) HB (Hardness Brinell, Brinell hardness), and after its annealing, hardness is lower than 225 Brinell hardness.Before feeding intake, first carry out chemical composition analysis, metallographic structure inspection and macrostructure inspection, if check result all meets the requirement of american steel materialogy meeting standard (AISI), then can it can be used as the starting material of described ultra microhardness calibrated bolck.
Described bearing steel is E52100 bearing steel.
Step 2, the starting material chosen step one forge, anneal, quench, tempering, plain grinding, grinding, polishing, destressing PROCESS FOR TREATMENT, obtain submicroscopic standard block of hardness.Concrete operation step is:
Step 1: forge.Warming-up device adopts batch-type furnace or salt bath furnace, and preheat temperature controls at 1100 DEG C (degree Celsius), is incubated 15 minutes; Forge temperature to control: initial forging temperature 1100 DEG C, final forging temperature is not less than 700 DEG C.Pier slightly pulls out 15 times with aftershaping repeatedly continuously, obtains cylindrical block of hardness.The diameter of section of cylindrical block of hardness is not less than Φ 28mm (millimeter).Forge shaping after be not less than at the temperature of 700 DEG C, put into rapidly husky groove or ash-pit insulation cooling.
Step 2: annealing.Cylindrical block of hardness hardness after forging, within the scope of (350,450) HB, is carried out preannealing and is just applicable to processing; Cylindrical block of hardness is put into meshbeltfurnace once anneal, heating-up temperature 850 DEG C, warm-up time 2 hours, be chilled to less than 250 DEG C air coolings of coming out of the stove with stove.
Step 3: quenching.Select batch-type furnace or salt bath furnace that the block of hardness after annealing is directly heated to temperature 950 DEG C, be incubated 1 hour, hardening media selects shrend, and water temperature remains on [40,50] DEG C, till cold.
Step 4: tempering.Select muffle furnace to carry out tempering, temperature spot is 200 DEG C, 300 DEG C, 450 DEG C, is incubated 2 hours respectively, and air cooling of then coming out of the stove is to cooling completely.
Step 5: plain grinding.Because air cooling rear oxidation skin is a lot, first 2 of the block of hardness after tempering planes are polished, then workplace and supporting surface are refined, its flatness is not more than 0.003mm, and the depth of parallelism is not more than 0.005mm.
Step 6: grinding.First rough lapping is carried out to the block of hardness after plain grinding and add lines removing to organic for the institute of workplace and supporting surface, and ensure that its depth of parallelism is not more than 0.005mm; Lappingout is ground to again does not have score line, and ensures that its flatness is not more than 0.003mm.
Step 7: polishing.To the first rough polishing of the block of hardness after grinding, then finishing polish to workplace roughness is less than 0.03 μm (micron) below.
Step 8: destressing.Block of hardness after polishing is put into constant temperature oven, by the temperature of 170 DEG C, is incubated more than 8 hours, removing machining stress.
Through the operation of above-mentioned steps, obtain ultra microhardness calibrated bolck, its hardness number is lower than 175HV, and scale range is (0.0005,0.05) HV.
Beneficial effect
The method of production of ultra microhardness calibrated bolck provided by the invention, the ultra microhardness calibrated bolck obtained by the method, its hardness number is lower than 175HV, scale range is (0.0005,0.05) HV, and well solve the technical bottlenecks such as homogeneity, stability, surfaceness, ultra microhardness calibrated bolck not only meets the requirement of the national and foreign standards such as measurement verification regulations, and for ultra microhardness measuring technology research provide the foundation and foundation.
Embodiment
Below by specific embodiment, technical solution of the present invention is described further.
The present embodiment adopts the method for production of described ultra microhardness calibrated bolck to make ultra microhardness calibrated bolck, and its operation steps comprises:
Step one, selection.Adopt E52100 bearing steel, its durometer level of dispatching from the factory is for (400,600) HB, and after its annealing, hardness is lower than 225 Brinell hardness.Before feeding intake, first carry out chemical composition analysis, metallographic structure inspection and macrostructure inspection, if check result all meets the requirement of american steel materialogy meeting standard (AISI), then can it can be used as the starting material of described ultra microhardness calibrated bolck.
Step 2, the starting material chosen step one forge, anneal, quench, tempering, plain grinding, grinding, polishing, destressing PROCESS FOR TREATMENT, obtain submicroscopic standard block of hardness.Concrete operation step is:
Step 1: forge.Warming-up device adopts batch-type furnace or salt bath furnace, and preheat temperature controls at 1100 DEG C (degree Celsius), is incubated 15 minutes; Forge temperature to control: initial forging temperature 1100 DEG C, final forging temperature is not less than 700 DEG C.Pier slightly pulls out 15 times with aftershaping repeatedly continuously, obtains cylindrical block of hardness.The diameter of section of cylindrical block of hardness is not less than Φ 28mm (millimeter).Forge shaping after be not less than at the temperature of 700 DEG C, put into rapidly husky groove or ash-pit insulation cooling.
Step 2: annealing.Cylindrical block of hardness hardness after forging, within the scope of (350,450) HB, is carried out preannealing and is just applicable to processing; Cylindrical block of hardness is put into meshbeltfurnace once anneal, heating-up temperature 850 DEG C, warm-up time 2 hours, be chilled to less than 250 DEG C air coolings of coming out of the stove with stove.
Step 3: quenching.Select batch-type furnace or salt bath furnace that the block of hardness after annealing is directly heated to temperature 950 DEG C, be incubated 1 hour, hardening media selects shrend, and water temperature remains on [40,50] DEG C, till cold.
Step 4: tempering.Select muffle furnace to carry out tempering, temperature spot is 200 DEG C, 300 DEG C, 450 DEG C, is incubated 2 hours respectively, and air cooling of then coming out of the stove is to cooling completely.
Step 5: plain grinding.Because air cooling rear oxidation skin is a lot, first 2 of the block of hardness after tempering planes are polished, then workplace and supporting surface are refined, its flatness is not more than 0.003mm, and the depth of parallelism is not more than 0.005mm.
Step 6: grinding.First rough lapping is carried out to the block of hardness after plain grinding and add lines removing to organic for the institute of workplace and supporting surface, and ensure that its depth of parallelism is not more than 0.005mm; Lappingout is ground to again does not have score line, and ensures that its flatness is not more than 0.003mm.
Step 7: polishing.To the first rough polishing of the block of hardness after grinding, then finishing polish is less than less than 0.03 μm to workplace roughness.
Step 8: destressing.Block of hardness after polishing is put into constant temperature oven, by the temperature of 170 DEG C, is incubated more than 8 hours, removing machining stress.
Through the operation of above-mentioned steps, obtain ultra microhardness calibrated bolck, its hardness number is lower than 175HV, and scale range is (0.0005,0.05) HV.
Claims (10)
1. a method of production for ultra microhardness calibrated bolck, is characterized in that: its operation steps comprises:
Step one, selection; Adopt bearing steel, its durometer level of dispatching from the factory is for (400,600) HB, and after its annealing, hardness is lower than 225HB; Before feeding intake, first carry out chemical composition analysis, metallographic structure inspection and macrostructure inspection, if check result all meets the requirement of american steel materialogy meeting standard AISI, then it can be used as the starting material of described ultra microhardness calibrated bolck;
Step 2, the starting material chosen step one forge, anneal, quench, tempering, plain grinding, grinding, polishing, destressing PROCESS FOR TREATMENT, obtain submicroscopic standard block of hardness.
2. the method for production of a kind of ultra microhardness calibrated bolck as claimed in claim 1, is characterized in that: bearing steel described in step one is E52100 bearing steel.
3. the method for production of a kind of ultra microhardness calibrated bolck as claimed in claim 1 or 2, is characterized in that: forge described in step 2, is specially: warming-up device adopts batch-type furnace or salt bath furnace, and preheat temperature controls at 1100 DEG C, is incubated 15 minutes; Forge temperature to control: initial forging temperature 1100 DEG C, final forging temperature is not less than 700 DEG C; Pier slightly pulls out 15 times with aftershaping repeatedly continuously, obtains cylindrical block of hardness; The diameter of section of cylindrical block of hardness is not less than Φ 28mm; Forge shaping after be not less than at the temperature of 700 DEG C, put into rapidly husky groove or ash-pit insulation cooling.
4. the method for production of a kind of ultra microhardness calibrated bolck as claimed in claim 1 or 2, it is characterized in that: anneal described in step 2, be specially: the cylindrical block of hardness after forging is put into meshbeltfurnace and once anneals, heating-up temperature 850 DEG C, warm-up time 2 hours, is chilled to less than 250 DEG C air coolings of coming out of the stove with stove.
5. the method for production of a kind of ultra microhardness calibrated bolck as claimed in claim 1 or 2, it is characterized in that: quench described in step 2, be specially: select batch-type furnace or salt bath furnace that the block of hardness after annealing is directly heated to temperature 950 DEG C, be incubated 1 hour, hardening media selects shrend, water temperature remains on [40,50] DEG C, till cold.
6. the method for production of a kind of ultra microhardness calibrated bolck as claimed in claim 1 or 2, it is characterized in that: tempering described in step 2, is specially: select muffle furnace to carry out tempering, temperature spot is 200 DEG C, 300 DEG C, 450 DEG C, be incubated 2 hours respectively, air cooling of then coming out of the stove is to cooling completely.
7. the method for production of a kind of ultra microhardness calibrated bolck as claimed in claim 1 or 2, it is characterized in that: plain grinding described in step 2, be specially: first 2 of the block of hardness after tempering planes are polished, again workplace and supporting surface are refined, its flatness is not more than 0.003mm, and the depth of parallelism is not more than 0.005mm.
8. the method for production of a kind of ultra microhardness calibrated bolck as claimed in claim 1 or 2, it is characterized in that: grind described in step 2, be specially: first rough lapping is carried out to the block of hardness after plain grinding and add lines removing to organic for the institute of workplace and supporting surface, and ensure that its depth of parallelism is not more than 0.005mm; Lappingout is ground to again does not have score line, and ensures that its flatness is not more than 0.003mm.
9. the method for production of a kind of ultra microhardness calibrated bolck as claimed in claim 1 or 2, is characterized in that: polishing described in step 2, is specially: to the first rough polishing of the block of hardness after grinding, then finishing polish is less than less than 0.03 μm to workplace roughness.
10. the method for production of a kind of ultra microhardness calibrated bolck as claimed in claim 1 or 2, it is characterized in that: destressing described in step 2, is specially: the block of hardness after polishing is put into constant temperature oven, by the temperature of 170 DEG C, be incubated more than 8 hours, removing machining stress.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410817563.XA CN104568636A (en) | 2014-12-12 | 2014-12-24 | Development method of ultra-microhardness standard block |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410771214 | 2014-12-12 | ||
| CN201410817563.XA CN104568636A (en) | 2014-12-12 | 2014-12-24 | Development method of ultra-microhardness standard block |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104568636A true CN104568636A (en) | 2015-04-29 |
Family
ID=53085215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410817563.XA Pending CN104568636A (en) | 2014-12-12 | 2014-12-24 | Development method of ultra-microhardness standard block |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104568636A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784529A (en) * | 2016-01-06 | 2016-07-20 | 陈俊薪 | Manufacturing process of plastic ball indentation hardness standard block |
| CN113607513A (en) * | 2021-07-20 | 2021-11-05 | 华电电力科学研究院有限公司 | Test block and method capable of rapidly checking low-hardness 91 steel hardness value |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103454123A (en) * | 2012-05-31 | 2013-12-18 | 黑龙江华安精益计量技术研究院有限公司 | Preparation method for high-hardness standard Brinell hardness block |
| CN103454122A (en) * | 2012-05-30 | 2013-12-18 | 黑龙江华安精益计量技术研究院有限公司 | Preparation method of ultra-low hardness value standard Brielle hardness block |
| CN103454124A (en) * | 2012-05-31 | 2013-12-18 | 黑龙江华安精益计量技术研究院有限公司 | Preparation method of standard Brinell hardness block having low hardness value |
-
2014
- 2014-12-24 CN CN201410817563.XA patent/CN104568636A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103454122A (en) * | 2012-05-30 | 2013-12-18 | 黑龙江华安精益计量技术研究院有限公司 | Preparation method of ultra-low hardness value standard Brielle hardness block |
| CN103454123A (en) * | 2012-05-31 | 2013-12-18 | 黑龙江华安精益计量技术研究院有限公司 | Preparation method for high-hardness standard Brinell hardness block |
| CN103454124A (en) * | 2012-05-31 | 2013-12-18 | 黑龙江华安精益计量技术研究院有限公司 | Preparation method of standard Brinell hardness block having low hardness value |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784529A (en) * | 2016-01-06 | 2016-07-20 | 陈俊薪 | Manufacturing process of plastic ball indentation hardness standard block |
| CN105784529B (en) * | 2016-01-06 | 2019-06-11 | 陈俊薪 | The manufacture craft of plastics ball indentation hardness calibrated bolck |
| CN113607513A (en) * | 2021-07-20 | 2021-11-05 | 华电电力科学研究院有限公司 | Test block and method capable of rapidly checking low-hardness 91 steel hardness value |
| CN113607513B (en) * | 2021-07-20 | 2023-06-23 | 华电电力科学研究院有限公司 | Test block and method capable of rapidly checking hardness value of low-hardness 91 steel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102252024B (en) | Steel ball special for third-age hub bearing for luxury cars | |
| CN103014284B (en) | Process for modifying GCr15 steel for manufacturing tapered roller | |
| CN101966645B (en) | Production method for high-precision rolling ball screw | |
| JP6572530B2 (en) | Heat treatment apparatus and heat treatment method | |
| CN103454123A (en) | Preparation method for high-hardness standard Brinell hardness block | |
| CN102380755B (en) | Processing technique for pump-nozzle plunger spring of diesel engine | |
| CN105838856A (en) | Step type normalizing technology for 25Cr2Ni4MoV forged piece | |
| CN104561478A (en) | High-carbon chromium bearing steel GCr15 lower bainite heat treatment technique | |
| CN102796965A (en) | Rolling mill support roll steel and heat treatment technology thereof | |
| CN104353976B (en) | Pivoting support processing and Technology for Heating Processing | |
| CN104630441A (en) | Heat treatment method for improving anti-fatigue performance of spring steel SK5 for automobile safety belt coil spring | |
| CN102766749B (en) | Process for quenching ball track of slewing bearing | |
| CN104568636A (en) | Development method of ultra-microhardness standard block | |
| CN103103321A (en) | Isothermal quenching process | |
| CN105886739A (en) | Processing technology for hinge shaft for low temperature environment | |
| JP2013221199A (en) | Method for producing bearing ring of rolling bearing | |
| CN100386448C (en) | Method for mormalizing cooling of forged steel pieces | |
| JP2016080097A (en) | Bearing ring and rolling bearing | |
| CN104108010A (en) | Processing technology of ring gauge | |
| CN104032115A (en) | Thermal treatment method for reducing secondary gear ring nitrogenized deformation | |
| CN101805882A (en) | Process for controlling deformation of gas nitrocarburizing part | |
| CN103215427A (en) | Heat treatment process of gauge block made of bearing steel | |
| CN104328250A (en) | Heat treatment process of bearing steel | |
| WO2018155588A1 (en) | Method for manufacturing bearing component | |
| US20170314117A1 (en) | Rolling-contact shaft member |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150429 |
|
| WD01 | Invention patent application deemed withdrawn after publication |