CN109406322A - Live hardness determination Piglet s colibacillosis method - Google Patents
Live hardness determination Piglet s colibacillosis method Download PDFInfo
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- CN109406322A CN109406322A CN201811076796.3A CN201811076796A CN109406322A CN 109406322 A CN109406322 A CN 109406322A CN 201811076796 A CN201811076796 A CN 201811076796A CN 109406322 A CN109406322 A CN 109406322A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/40—Investigating hardness or rebound hardness
- G01N3/52—Investigating hardness or rebound hardness by measuring extent of rebound of a striking body
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/40—Investigating hardness or rebound hardness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/40—Investigating hardness or rebound hardness
- G01N3/48—Investigating hardness or rebound hardness by performing impressions under impulsive load by indentors, e.g. falling ball
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0076—Hardness, compressibility or resistance to crushing
- G01N2203/0078—Hardness, compressibility or resistance to crushing using indentation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0076—Hardness, compressibility or resistance to crushing
- G01N2203/0083—Rebound strike or reflected energy
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- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The present invention relates to a kind of live hardness determination Piglet s colibacillosis methods.In order to overcome portable Leeb Hardness Tester and portable cloth Lip river hardometer to be unable to satisfy efficient production period Hardness Surveillance demand.The present invention is the following steps are included: step S1: the selection of experimental enviroment；Step S2: the selection of testing equipment；Step S3: the selection of subjects；Step S4: the preparation of the live test sample of simulation；Step S5: live hardness determination is simulated；Step S6: the preparation of laboratory test sample；Step S7: laboratory hardness determination；Step S8: live hardness determination effect determines.The feature that present invention combination Power Station Boiler Heating Surface pipe quantity is more, measuring point is wide, under laboratory environment condition, the field condition of analog detection object, the true hardness performance for assessing test object.The case where meeting efficient production testing demand, and do not influence the production cycle, also having can effectively avoid because of stiffness issue generation technology dispute.
Description
Technical field
The invention belongs to hardness determination technical fields, and in particular to live hardness determination Piglet s colibacillosis method.
Background technique
Live hardness determination is carried out using portable Leeb Hardness Tester, method is simple, rapid, and the trace remained on the surface
Very little, it is very widely used in Metal Parts in Power Plant hardness determination.From inspection detection work usually, it has proved that, it adopts
When detecting large-sized heavy-wall tube hardness with portable Leeb Hardness Tester, as long as testing conditions are preferable, buffed surface is good, and surface is flat
It is smooth, then it can reach accurate detection effect, the actual hardness value of base instinct reflection test object.And small-caliber thin-walled tube is then
Difference, since its radius of curvature is small, weight is relatively light, and wall is thin, and rigidity is constantly present hard well below large-diameter pipe thick-walled pipe
The inaccurate problem of degree measurement, especially Power Station Boiler Heating Surface pipe, quantity is more, measuring point is wide, once occur producing because of stiffness issue
Raw technology dispute solves process troublesome, it is often necessary to and it does destructive sampling laboratory is sent to do hardness determination and verified, this
It causes a large amount of man power and material to waste enterprise, and seriously affects the production cycle.
According to wanting for standard DL/T 1719-2017 " examining metal parts fire protection technology using Portable Brinell hardness tester "
It asks, recommends to use Portable Brinell hardness tester, such as application No. is 200910196541.5 Chinese patents, still, examine at the scene
When surveying hardness, needed visually or using CCD optical measurement camera lens measuring probe on sample using Portable Brinell hardness tester
Impression diameter, then check in ball hardness number according to standard GB/T231.4.This method is cumbersome, and site environment
It is required that it is high, it is unsatisfactory for efficient production period Hardness Surveillance demand, especially Power Station Boiler Heating Surface pipe, quantity is more, measuring point is wide, all
Production cycle will be seriously affected using Portable Brinell hardness tester.
Summary of the invention
It is an object of the invention to overcome the above deficiencies in the existing technologies, for heating surface tubes in boilers, provide existing
Field hardness determination Piglet s colibacillosis method, compares portable Leeb Hardness Tester, portable cloth Lip river hardometer and lab bench
Difference of the hardometer to same subjects in test result, and empirical law is summed up, it is hard to meet efficient production period
The purpose of technology dispute in terms of spending inspection demand and effectively solving hardness.
Technical solution used by the present invention solves the above problems is: a kind of scene hardness determination Piglet s colibacillosis side
Method, characterized in that it comprises the following steps:
Step S1, the selection of experimental enviroment: live hardness determination Piglet s colibacillosis method is in laboratory environment condition
Lower progress；
Step S2, the selection of testing equipment: testing equipment used in live hardness determination Piglet s colibacillosis method, including
Live hardness determination portable Leeb Hardness Tester, portable cloth Lip river hardometer and use for laboratory bench mounted hardness tester each one；
Step S3, the selection of subjects: Power Station Boiler Heating Surface pipe；
Step S4 simulates the preparation of live test sample: polished using grinding and polishing tool test outer tube surface,
Polishing forms detection zone；
Step S5 simulates live hardness determination: the first step, the sample prepared using portable Leeb Hardness Tester to step S4
Detection zone carry out hardness determination, recording detection data, and calculate average value；Second step utilizes portable cloth Lip river hardometer pair
The detection zone of the sample of step S4 preparation carries out hardness determination, recording detection data, and calculates average value；
Step S6 is extracted sample block to test pipe using thread-cutting tool, is polished, polished using grinding and polishing tool, shape
At detection plane area；
Step S7, laboratory hardness determination: using bench mounted hardness tester in the preparation of step S6 laboratory test sample
The detection plane area of formation carries out hardness determination, recording detection data, and calculates average value；
Step S8, live hardness determination effect determine: the detection data recorded according to step S5 and step S7, it is poor to calculate
Value.
Wherein in step S1, laboratory ambient temperature is at 10~35 DEG C；Ambient enviroment is without friction, without strong magnetic field, without corruption
Corrosion medium.
Wherein in step S2, portable Leeb Hardness Tester model HT-2000A；Portable cloth Lip river hardometer model
PHBR-100；Use for laboratory bench mounted hardness tester model HBE-3000A electronics Brinell hardness tester.
Wherein in step S3, Power Station Boiler Heating Surface pipe outside diameter dimension D: D >=35mm；Wall thickness T size are as follows: 12mm >=T >=
4mm。
Wherein in step S3, Power Station Boiler Heating Surface pipe should have ferromagnetism, if nonmagnetic, not such as austenitic stainless steel
It with ferromagnetism, can not be adhered on sample, then need using ferromagnetism tooling appropriate.
Wherein in step S4, detection zone surface smooth planar, non-scale, without decarburized layer, without dirt, surface roughness ginseng
Number Ra is not more than 1.6 μm.
Wherein in step S5, when being detected using portable Leeb Hardness Tester test forced direction perpendicular to detection plane,
And there must not be relative movement.
Wherein in step S5, when being detected using portable cloth Lip river hardometer, hardometer should be steadily fixed on detection workpiece,
Forced direction is tested perpendicular to detection plane, and there must not be relative movement.
Wherein in step S5, hardness determination at least should be in 3 different locations, and impression center should not away from sample Edge Distance
Less than 2.5 times of impression average diameter, two adjacent indentations distance is at least 3 times of impression average diameter.
Wherein in step S5, detection impression is not overlapped with the first step detection impression when second step detects.
Wherein in step S6, the position for extracting sample block is step S4 test sample detection zone, the detection zone plane of formation
For the detection plane area of step S4 test sample, surface smooth planar, non-scale, without decarburized layer, without dirt, surface roughness
Parameter Ra is not more than 1.6 μm.
Wherein in step S7, test forced direction is perpendicular to detection plane when hardness determination, and must not relatively move.
Wherein in step S7, hardness determination at least should be in 3 different locations, and impression center should not away from sample Edge Distance
Less than 2.5 times of impression average diameter, two adjacent indentations distance is at least 3 times of impression average diameter.
Wherein in step S8, calculating difference for the average value of institute's detection data in step S5 and step S7 difference.
Compared with prior art, the present invention having the following advantages that and effect: the present invention provides live hardness determination effects
Comparative test method, for portable Leeb Hardness Tester is inaccurate to small-bore pipe hardness measurement and portable cloth Lip river hardometer
It is cumbersome, the case where being unable to satisfy efficient production period Hardness Surveillance demand, the more, measuring point in conjunction with Power Station Boiler Heating Surface pipe quantity
Wide feature, under laboratory environment condition, the field condition of analog detection object, using portable Leeb Hardness Tester and portable
Shi Buluo hardometer carries out hardness measurement, and is carried out to the same test position of same subjects using lab bench hardometer
Hardness measurement compares measurement data, calculating difference, Rule Summary, and the scene of realization is detected with portable Leeb Hardness Tester
Based on, supplemented by the hardometer of portable cloth Lip river, the true hardness performance for assessing test object.One aspect of the present invention meets efficient life
Inspection demand is produced, avoids and further does destructive sampling laboratory is sent to do hardness determination, reduce cost of human and material resources, and
The production cycle is not influenced, on the other hand, the case where having can effectively avoid because of stiffness issue generation technology dispute.
Specific embodiment
Below by embodiment, the present invention is described in further detail, following embodiment be explanation of the invention and
The invention is not limited to following embodiments.
Embodiment.
Live hardness determination Piglet s colibacillosis method in the present embodiment, including the following steps:
Step S1: the selection of experimental enviroment.
In the present embodiment, the experimental enviroment is 25 DEG C of temperature, and surrounding it is without friction, without strong magnetic field, non-corrosive
Medium.
Step S2: the selection of testing equipment.
In the present embodiment, the testing equipment includes the portable Leeb Hardness Tester of a model HT-2000A, one
The use for laboratory electronics Brinell hardness of the portable cloth Lip river hardometer of platform model PHBR-100 and a model HBE-3000A
Meter.
Step S3: the selection of subjects.
In the present embodiment, the subjects are the common T91 material pipe of boiler high temperature reheater, are had ferromagnetic
Property, specification is respectively 50 × 4mm of Ф, 50 × 7mm of Ф, 50 × 10mm of Ф.
Step S4: the preparation of the live test sample of simulation.
In the present embodiment, the preparation step of the live test sample of simulation is as follows:
To the T91 pipe of three kinds of different sizes, is polished using grinding and polishing tool test outer tube surface, polished, shape
At detection plane area, detect plane area surface smooth planar, non-scale, without decarburized layer, without dirt, surface roughness parameter Ra
No more than 1.6 μm.
Step S5: live hardness determination is simulated.
In the present embodiment, steps are as follows for the hardness determination:
The first step, using HT-2000A model portable Leeb Hardness Tester to being prepared in step S4 described in the present embodiment
Sample carry out hardness determination respectively, test forced direction is perpendicular to detection plane.Five groups of data, record detection are tested respectively
Data, and average value is calculated, such as following table.
| Specification | First group/HB | Second group/HB | Third group/HB | 4th group/HB | 5th group/HB | Average value AVG1/HB |
| Ф50×4 | 174 | 172 | 176 | 170 | 174 | 173 |
| Ф50×7 | 194 | 195 | 198 | 198 | 194 | 196 |
| Ф50×10 | 212 | 215 | 215 | 217 | 215 | 215 |
Second step, using the portable cloth Lip river hardometer of PHBR-100 model to being prepared in step S4 described in the present embodiment
Sample carry out hardness determination, test forced direction perpendicular to detection plane, test point not with step described in the present embodiment
First step test point repeats in rapid S5.Five groups of data, recording detection data are tested respectively, and calculate average value, such as following table.
| Specification | First group/HB | Second group/HB | Third group/HB | 4th group/HB | 5th group/HB | Average value AVG2/HB |
| Ф50×4 | 216 | 214 | 215 | 214 | 215 | 215 |
| Ф50×7 | 222 | 217 | 220 | 223 | 219 | 220 |
| Ф50×10 | 225 | 228 | 227 | 226 | 228 | 227 |
Step S6: the preparation of laboratory test sample.
In the present embodiment, the preparation step of the laboratory test sample is as follows:
Sample block is extracted in the detection zone of the T91 pipe of above-mentioned three kinds of different sizes, is processed into pat, the inspection of formation
Surveying area is former detection plane area, surface smooth planar, non-scale, without decarburized layer, without dirt, surface roughness parameter Ra is little
In 1.6 μm.
Step S7: laboratory hardness determination.
Hardness is carried out respectively to sample in step S6 described in the present embodiment using HBE-3000A electronics Brinell hardness tester
Detection, test forced direction is perpendicular to detection plane.Five groups of data are tested respectively, and record data, such as following table.
| Specification | First group/HB | Second group/HB | Third group/HB | 4th group/HB | 5th group/HB | Average value AVG3/HB |
| Ф50×4 | 219 | 219 | 218 | 218 | 220 | 219 |
| Ф50×7 | 221 | 221 | 219 | 220 | 221 | 220 |
| Ф50×10 | 225 | 228 | 226 | 226 | 228 | 227 |
Step S8: live hardness determination effect determines.
In the present embodiment, the live hardness determination effect determination step is as follows:
Calculate the difference of the average value of calculating described in step S5 and step S7 described in the present embodiment, such as following table.
In the present embodiment, the difference " -12HB, -24HB, -46HB " and " 0,0, -4 " are not absolute, in different items
Under part (such as operator's level, instrumental sensitivity, surface polishing quality), difference might have.
In the present embodiment, the difference can simplified summary description are as follows: in the case where wall thickness is thicker (such as Ф 50 ×
10mm), portable cloth Lip river hardometer can measure exact value, and portable Leeb Hardness Tester detected value is lower than exact value about 12HB；?
In the case that wall thickness is medium (such as 50 × 7mm of Ф), portable cloth Lip river hardometer can measure exact value, portable Leeb Hardness Tester inspection
Measured value is lower than exact value about 24HB；In the case where wall thickness is relatively thin (such as 50 × 4mm of Ф), portable cloth Lip river hardometer is slightly below standard
Really value, portable Leeb Hardness Tester detected value are lower than exact value about 46HB.
It is any to be familiar with although the present invention is disclosed as above with embodiment, its protection scope being not intended to limit the invention
The technical staff of this technology changes and retouches made without departing from the spirit and scope of the invention, should belong to this hair
Bright protection scope.
Claims (10)
1. a kind of scene hardness determination Piglet s colibacillosis method, characterized in that it comprises the following steps:
Step S1, the selection of experimental enviroment: live hardness determination Piglet s colibacillosis method be under laboratory environment condition into
Row；
Step S2, the selection of testing equipment: testing equipment used in live hardness determination Piglet s colibacillosis method, including scene
Hardness determination portable Leeb Hardness Tester, portable cloth Lip river hardometer and use for laboratory bench mounted hardness tester each one；
Step S3, the selection of subjects: Power Station Boiler Heating Surface pipe；
Step S4 simulates the preparation of live test sample: being polished using grinding and polishing tool test outer tube surface, is thrown
Light forms detection zone；
Step S5 simulates live hardness determination: the first step, the inspection using portable Leeb Hardness Tester to the step S4 sample prepared
It surveys area and carries out hardness determination, recording detection data, and calculate average value；Second step, using portable cloth Lip river hardometer to step
The detection zone of the sample of S4 preparation carries out hardness determination, recording detection data, and calculates average value；
The preparation of laboratory test sample: step S6 extracts sample block to test pipe using thread-cutting tool, utilizes grinding and polishing work
Tool is polished, is polished, and detection plane area is formed；
Step S7, laboratory hardness determination: the preparation using lab bench hardometer to step S6 laboratory test sample
The detection plane area of middle formation carries out hardness determination, recording detection data, and calculates average value；
Step S8, live hardness determination effect determine: the detection data recorded according to step S5 and step S7, calculating difference.
2. scene hardness determination Piglet s colibacillosis method according to claim 1, which is characterized in that real in step S1
Room environmental temperature is tested at 10 ~ 35 DEG C；Ambient enviroment is without friction, without strong magnetic field, non-corrosive medium.
3. scene hardness determination Piglet s colibacillosis method according to claim 1, which is characterized in that in step S2, just
Take formula Leeb Hardness Tester model HT-2000A；Portable cloth Lip river hardometer model PHBR-100；The desk-top hardness of use for laboratory
Count model HBE-3000A electronics Brinell hardness tester.
4. scene hardness determination Piglet s colibacillosis method according to claim 1, which is characterized in that in step S3, electricity
It stands heating surface tubes in boilers outer diameter D size are as follows: D >=35mm；Wall thickness T size are as follows: 12mm >=T >=4mm；Power Station Boiler Heating Surface pipe tool
There is ferromagnetism, if nonmagnetic, can not be adhered on sample, then uses ferromagnetism tooling appropriate.
5. scene hardness determination Piglet s colibacillosis method according to claim 1, which is characterized in that in step S4, inspection
Survey area surface smooth planar, non-scale, without decarburized layer, without dirt, surface roughness parameter Ra is not more than 1.6 μm.
6. scene hardness determination Piglet s colibacillosis method according to claim 1, which is characterized in that in step S5, benefit
Forced direction is tested when being detected with portable Leeb Hardness Tester perpendicular to detection plane, and there must not be relative movement；Using just
Take Shi Buluo hardometer detection when, hardometer be steadily fixed on detection workpiece on, test forced direction perpendicular to detection plane,
And there must not be relative movement.
7. scene hardness determination Piglet s colibacillosis method according to claim 1, which is characterized in that in step S5, firmly
Degree detection is at least in 3 different locations, and impression center is not less than 2.5 times of impression average diameter away from sample Edge Distance, and two
Adjacent indentations distance is at least 3 times of impression average diameter；Detection impression does not detect impression weight with the first step when second step detects
It closes.
8. scene hardness determination Piglet s colibacillosis method according to claim 1, which is characterized in that in step S6, cut
The position for sampling block is step S4 test sample detection zone, and the detection zone plane of formation is that the detection of step S4 test sample is flat
Face area, surface smooth planar, non-scale, without decarburized layer, without dirt, surface roughness parameter Ra is not more than 1.6 μm.
9. scene hardness determination Piglet s colibacillosis method according to claim 1, which is characterized in that in step S7, firmly
Test forced direction is perpendicular to detection plane when degree detection, and must not have relative movement；Hardness determination is at least 3 different positions
It sets, and impression center is not less than 2.5 times of impression average diameter away from sample Edge Distance, two adjacent indentations distance is at least impression
3 times of average diameter.
10. scene hardness determination Piglet s colibacillosis method according to claim 1, which is characterized in that in step S8, meter
Difference is calculated as the difference of the average value of institute's detection data in step S5 and step S7.
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Cited By (4)
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| CN113176160A (en) * | 2021-03-26 | 2021-07-27 | 国能锅炉压力容器检验有限公司 | Uniform-velocity rebound hardness test method based on average impact rebound velocity measurement |
| CN113433014A (en) * | 2021-06-25 | 2021-09-24 | 西安热工研究院有限公司 | Method for confirming on-site hardness correction coefficient of boiler tube |
| 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 |
| CN113820211A (en) * | 2021-09-16 | 2021-12-21 | 马鞍山钢铁股份有限公司 | Method for measuring coal hardening period under silo process condition |
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| 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 |
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| CN113820211A (en) * | 2021-09-16 | 2021-12-21 | 马鞍山钢铁股份有限公司 | Method for measuring coal hardening period under silo process condition |
| CN113820211B (en) * | 2021-09-16 | 2024-01-30 | 马鞍山钢铁股份有限公司 | Method for measuring hardening period of coal under silo process condition |
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Application publication date: 20190301 |