CN105675417A - GH4145 bolt Rockwell hardness value determination method and apparatus - Google Patents
GH4145 bolt Rockwell hardness value determination method and apparatus Download PDFInfo
- Publication number
- CN105675417A CN105675417A CN201410658004.9A CN201410658004A CN105675417A CN 105675417 A CN105675417 A CN 105675417A CN 201410658004 A CN201410658004 A CN 201410658004A CN 105675417 A CN105675417 A CN 105675417A
- Authority
- CN
- China
- Prior art keywords
- bolt
- hardness
- lee
- rockwell hardness
- rockwell
- 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
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention provides a GH4145 bolt Rockwell hardness value determination method and apparatus, and the method is as follows: Leeb hardness values and Rockwell hardness values of each location of a plurality of locations of at least two sample GH4145 bolts are obtained by multiple times of measurement, the plurality of locations include a threaded surface, a threaded core portion, a polish rod surface and a polish rod core portion; the average Leeb hardness value and the average Rockwell hardness value of each location are calculated; a correspondence relationship curve of the Leeb hardness value and the Rockwell hardness value corresponding to each location is generated according to the average Leeb hardness values and the average Rockwell hardness values of the plurality of locations of the sample GH4145 bolts; and the Leeb hardness values of a plurality of locations of a to-be-tested GH4145 bolt are measured, and the Rockwell hardness values of the plurality of locations of the to-be-tested GH4145 bolt can be determined according to the correspondence relationship curve. The GH4145 bolt Rockwell hardness value determination method can reduce the bias of determining of the Rockwell hardness values of the GH4145 bolt, reduces misjudgment rate, and reduces material waste.
Description
Technical field
The present invention relates to high quality steel field of measuring technique, in particular to the defining method of Rockwell hardness number and the device of a kind of GH4145 bolt.
Background technology
GH4145 nickel base superalloy is the age hardening type wrought superalloy taking γ ' [Ni3 (Al, Ti, Nb)] as main strengthening phase, there is excellent relaxation resistance, antioxidant property and creep rupture strength, extensively it is used as the holding bolt of the parts such as 300MW, 600MW, even 1000MW power generator turbine cylinder, main valve, flange. Under super (super-) critical operating mode, the change of microstructure can be there is in GH4145 bolt in military service process, thus cause its creep and enduring quality decline, macroscopically showing as hardness number rising, therefore, the change of GH4145 bolt performance is normally monitored in fuel-burning power plant by measuring hardness.
To in the research of GH4145 bolt hardness and spot inspection, conventional test method has three kinds: one to be, with Rockwell hardometer, parts are carried out Rockwell hardness detection, two is, with Leeb Hardness Tester, parts are carried out on-the-spot test, and three is carry out Brinell hardness test with desk-top Brinell tester.
Lee ' hardness is the impact body by regulation certain mass, with certain speed impact specimen surface, by impact head in the test coupon surface rebound velocity at 1mm place and its lee ' hardness value of ratio calculation of impact velocity, and Leeb Hardness Tester is easy to carry, its testing method is simple, to parts not damaged, it is applicable to the detection of on-the-spot in-service parts, it is characterized in precision height, it is ensured that ± 0.8%, but there is no its corresponding criterion.
Rockwell hardness is by pressure head (such as, diamond circular cone, steel ball or sintered carbide ball etc.) point two step pressing in sample surfaces, after the regulation hold-time, the main test power of removal, measure the remaining depth of indentation h under first test power, and then calculate Rockwell hardness.It is characterized in that impression is very little, it is applicable to finished product and thin slice, easy to operate, fast intuitively, it is applicable in a large amount of production.
Brinell hardness is under certain detect force effect, the ratio of pressure and sample impression area. Its feature measuring accuracy height, repeatability are good, but impression is big, and need to be dissected by parts, are not suitable for finished product detection.
Due to the respective feature of Richter scale, Rockwell, Brinell hardness detection, the judgement of parts hardness is not all adopted lee ' hardness by most standard, but the conversion table in establishing criteria GB/T17394-1998 " metal lee ' hardness test method ", lee ' hardness is converted to Brinell hardness or Rockwell hardness, thus carry out the judgement of parts hardness, therefore, reality often needs to carry out the lee ' hardness of material and Rockwell hardness conversion, the conversion between lee ' hardness (HLD) that especially D type percussion mechanism records and the Rockwell hardness (HRC) that C scale records. Although establishing criteria GB/T17394-1998 " metal lee ' hardness test method " can realize the conversion between Richter scale, Rockwell hardness, but GB/T17394-1998 only lists the conversion of the lee ' hardness within the scope of 510～890HLD and Rockwell hardness, and it is only applicable to low alloy steel, and GH4145 is high quality steel, GB/T17394 can not be directly used to convert. Therefore, owing to GB/T17394-1998 " metal lee ' hardness test method " is to the inapplicability of high-alloy metal parts, and the limitation of the value range that can convert, if carrying out the conversion between lee ' hardness and Rockwell hardness number according to the subordinate list of GB/T17394-1998 " metal lee ' hardness test method ", will certainly there is very big deviation in the Rockwell hardness of the GH4145 bolt drawn, make in real work, cause serious misjudgment phenomenon, again the manufacture of defective GH4145 bolt, causes waste of material.
Summary of the invention
Embodiments provide the defining method of the Rockwell hardness number of a kind of GH4145 bolt, the deviation of appearance, reduction False Rate, the waste of minimizing data during to reduce the Rockwell hardness number determining GH4145 bolt. The method comprises: obtain at least two multiple positions of sample GH4145 bolt on each position, lee ' hardness value that repetitive measurement obtains and Rockwell hardness number, and described multiple position comprises: thread surface, screw thread heart portion, polished rod surface and polished rod heart portion; Calculate the average lee ' hardness value at each position described and average Rockwell hardness number; Average lee ' hardness value according to the multiple position of described sample GH4145 bolt and average Rockwell hardness number, generate corresponding to the lee ' hardness value at each position described and the corresponding relation curve of Rockwell hardness number; Measure the lee ' hardness value at multiple positions of GH4145 bolt to be measured, determine the Rockwell hardness number at multiple positions of described GH4145 bolt to be measured according to described corresponding relation curve.
In an embodiment, each position refers to the region that each position comprises, and lee ' hardness value that on each position described, repetitive measurement obtains and Rockwell hardness number, comprising: measure lee ' hardness value and Rockwell hardness number that many places obtain on each position described.
In an embodiment, the number that described at least two sample GH4145 bolts are sample GH4145 bolt is 14.
In an embodiment, in acquisition at least two multiple positions of sample GH4145 bolt on each position, before lee ' hardness value that repetitive measurement obtains and Rockwell hardness number, also comprise: adopt standard hardness block to calibrate for measuring the Leeb Hardness Tester of lee ' hardness value and the Rockwell hardometer for measuring Rockwell hardness number.
In an embodiment, generation corresponding to the lee ' hardness value at each position described and the corresponding relation formula of Rockwell hardness number is: HRC=0.080*HLD-4.1, wherein, HRC is Rockwell hardness, and HLD is lee ' hardness.
The embodiment of the present invention additionally provides the determining device of the Rockwell hardness number of a kind of GH4145 bolt, the deviation of appearance, reduction False Rate, the waste of minimizing data during to reduce the Rockwell hardness number determining GH4145 bolt. This device comprises: acquisition module, for obtaining each position at least two multiple positions of sample GH4145 bolt, lee ' hardness value that repetitive measurement obtains and Rockwell hardness number, described multiple position comprises: thread surface, screw thread heart portion, polished rod surface and polished rod heart portion; Calculate module, for calculating the average lee ' hardness value at each position described and average Rockwell hardness number; Generation module, for the average lee ' hardness value according to the multiple position of described sample GH4145 bolt and average Rockwell hardness number, generates corresponding to the lee ' hardness value at each position described and the corresponding relation curve of Rockwell hardness number; Determination module, for measuring the lee ' hardness value at multiple positions of GH4145 bolt to be measured, determines the Rockwell hardness number at multiple positions of described GH4145 bolt to be measured according to described corresponding relation curve.
In an embodiment, each position refers to the region that each position comprises, and lee ' hardness value that on each position described, repetitive measurement obtains and Rockwell hardness number, comprising: measure lee ' hardness value and Rockwell hardness number that many places obtain on each position described.
In an embodiment, the number that described at least two sample GH4145 bolts are sample GH4145 bolt is 14.
In an embodiment, also comprise: calibration module, for obtaining each position in the multiple position of sample GH4145 bolt, before lee ' hardness value that repetitive measurement obtains and Rockwell hardness number, standard hardness block is adopted to calibrate for measuring the Leeb Hardness Tester of lee ' hardness value and the Rockwell hardometer for measuring Rockwell hardness number.
In an embodiment, generation corresponding to the lee ' hardness value at each position described and the corresponding relation formula of Rockwell hardness number is: HRC=0.080*HLD-4.1, wherein, HRC is Rockwell hardness, and HLD is lee ' hardness.
In embodiments of the present invention, for the characteristic of GH4145 bolt, by obtaining at least, the multiple position of sample GH4145 bolt is (such as, thread surface, screw thread heart portion, polished rod surface and polished rod heart portion) on each position, lee ' hardness value that repetitive measurement obtains and Rockwell hardness number, calculate the average lee ' hardness value at each position and average Rockwell hardness number, and according to the average lee ' hardness value at the multiple position of sample GH4145 bolt and average Rockwell hardness number, generate corresponding to the lee ' hardness value at each position and the corresponding relation curve of Rockwell hardness number, after the lee ' hardness value at multiple positions measuring GH4145 bolt to be measured, the Rockwell hardness number at multiple positions of GH4145 bolt to be measured can be determined according to above-mentioned corresponding relation curve, compared with the mode carrying out conversion Rockwell hardness in prior art according to GB/T17394, the deviation occurred when can reduce the Rockwell hardness number determining GH4145 bolt, False Rate can be reduced, minimizing actual hardness value is qualified but test data shows defective phenomenon, and then waste of material can be reduced, can also being calculated by lee ' hardness simultaneously and obtain Rockwell hardness, simplification operates, and reduces the damage to parts, is more suitable for the detection of on-the-spot in-service parts.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the part of the application, does not form limitation of the invention.In the accompanying drawings:
Fig. 1 is the schema of the defining method of the Rockwell hardness number of a kind of GH4145 bolt that the embodiment of the present invention provides;
Fig. 2 is a kind of lee ' hardness of embodiment of the present invention offer and the relation curve schematic diagram of Rockwell hardness;
Fig. 3 is the structure block diagram of the determining device of the Rockwell hardness number of a kind of GH4145 bolt that the embodiment of the present invention provides.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with enforcement mode and accompanying drawing, the present invention is described in further details. At this, the exemplary embodiment of the present invention and illustrating for explaining the present invention, but not as a limitation of the invention.
In embodiments of the present invention, it provides the defining method of the Rockwell hardness number of a kind of GH4145 bolt, as shown in Figure 1, the method comprises:
Step 101: obtain at least two multiple positions of sample GH4145 bolt on each position, lee ' hardness value that repetitive measurement obtains and Rockwell hardness number, described multiple position comprises: thread surface, screw thread heart portion, polished rod surface and polished rod heart portion;
Step 102: calculate the average lee ' hardness value at each position described and average Rockwell hardness number;
Step 103: according to the average lee ' hardness value at the multiple position of described sample GH4145 bolt and average Rockwell hardness number, generates corresponding to the lee ' hardness value at each position described and the corresponding relation curve of Rockwell hardness number;
Step 104: the lee ' hardness value measuring multiple positions of GH4145 bolt to be measured, determines the Rockwell hardness number at multiple positions of described GH4145 bolt to be measured according to described corresponding relation curve.
Flow process as shown in Figure 1 is known, in embodiments of the present invention, for the characteristic of GH4145 bolt, by obtaining at least, the multiple position of sample GH4145 bolt is (such as, thread surface, screw thread heart portion, polished rod surface and polished rod heart portion) on each position, lee ' hardness value that repetitive measurement obtains and Rockwell hardness number, calculate the average lee ' hardness value at each position and average Rockwell hardness number, and according to the average lee ' hardness value at the multiple position of sample GH4145 bolt and average Rockwell hardness number, generate corresponding to the lee ' hardness value at each position and the corresponding relation curve of Rockwell hardness number, after the lee ' hardness value at multiple positions measuring GH4145 bolt to be measured, the Rockwell hardness number at multiple positions of GH4145 bolt to be measured can be determined according to above-mentioned corresponding relation curve, compared with the mode carrying out conversion Rockwell hardness in prior art according to GB/T17394, the deviation occurred when can reduce the Rockwell hardness number determining GH4145 bolt, False Rate can be reduced, minimizing actual hardness value is qualified but test data shows defective phenomenon, and then waste of material can be reduced, can also being calculated by lee ' hardness simultaneously and obtain Rockwell hardness, simplification operates, and reduces the damage to parts, is more suitable for the detection of on-the-spot in-service parts.
Concrete, said sample GH4145 bolt is that size, quality and surfaceness etc. all meet the relevant requirement in GB/T17394-1998 " metal lee ' hardness test method " and GB-T230.1-2009 " metallic rockwell hardness test the 1st part: test method ".
When specifically implementing, generate and corresponding to the lee ' hardness value at each position described and the corresponding relation formula of Rockwell hardness number it is: HRC=0.080*HLD-4.1, wherein, HRC is Rockwell hardness, HLD is lee ' hardness value, 1. the scope of application: 440 < HLD < 530,2. error=± 2.5%, concrete generating is as shown in table 1 below corresponding to the lee ' hardness value at each position described and the mapping table of Rockwell hardness number, and the corresponding relation curve generating the lee ' hardness value corresponding to each position described and Rockwell hardness number is as shown in Figure 2.
Table 1
| HLD | 442 | 447 | 455 | 463 | 464 | 466 |
| HRC calculated value | 31.3 | 31.7 | 32.3 | 32.9 | 33.0 | 33.2 |
| HLD | 467 | 469 | 470 | 472 | 474 | 475 |
| HRC calculated value | 33.3 | 33.4 | 33.5 | 33.7 | 33.8 | 33.9 |
| HLD | 476 | 476.5 | 477 | 478 | 479 | 480 |
| HRC calculated value | 34.0 | 34.0 | 34.1 | 34.1 | 34.2 | 34.3 |
| HLD | 483 | 485 | 486 | 488 | 490 | 491 |
| HRC calculated value | 34.5 | 34.7 | 34.8 | 34.9 | 35.1 | 35.2 |
| HLD | 492 | 494 | 496 | 497 | 499 | 499.5 |
| HRC calculated value | 35.3 | 35.4 | 35.6 | 35.7 | 35.8 | 35.9 |
| HLD | 500 | 500.5 | 501 | 502 | 511 | 516 |
| HRC calculated value | 35.9 | 35.9 | 36.0 | 36.1 | 36.8 | 37.2 |
| HLD | 522 | |||||
| HRC calculated value | 37.66 |
When specifically implementing, although prior art has the measurement method for Brinell hardness of P91 steel steam-pipe, but P91 steel steam-pipe is transmission part and manufacturing process is rolling, and GH4145 bolt is that fastening piece class, manufacturing process are for forging, component categories belonging to the two is all different with manufacturing process, in addition, owing to Rockwell hardness and Brinell hardness are in testing tool, testing method, to the destructiveness of tested object and surveyed in the expression of data all different, this also makes both there is bigger difference in data acquisition process and data conversion process. therefore, the method measuring P91 steel steam-pipe Brinell hardness is not suitable for the rockwell hardness measurement of GH4145 bolt, if using the method measuring P91 steel steam-pipe Brinell hardness to measure the Rockwell hardness of GH4145 bolt, relatively big error can be caused, the serious judgement affecting parts security, in this application, for the feature of GH4145 bolt, in order to can be accurate, measure the Rockwell hardness of GH4145 bolt comprehensively, when measuring lee ' hardness value and the Rockwell hardness number at the multiple position of sample GH4145 bolt, multiple positions of this sample GH4145 bolt comprise: thread surface, screw thread heart portion, polished rod surface and polished rod heart portion.
When specifically implementing, in order to improve the precision of the corresponding relation curve of lee ' hardness value and Rockwell hardness number, in the present embodiment, on each position, repetitive measurement obtains lee ' hardness value and the Rockwell hardness number at this position, such as, each position refers to the region that each position comprises, on each position, many places measurement obtains lee ' hardness value and Rockwell hardness number, concrete, measures five places and obtain lee ' hardness value and measure three places obtaining Rockwell hardness number on each position.
When specifically implementing, in the corresponding relation curve procedures generating lee ' hardness value and Rockwell hardness number, in order to take into account the precision of calculated amount and curve, in the present embodiment, select the number of suitable sample GH4145 bolt, namely the number of sample GH4145 bolt is 14, now realizes calculated amount moderate, and curve also reaches precision certain, that meet requirement.
In order to improve the precision of the corresponding relation curve of lee ' hardness value and Rockwell hardness number further, in the present embodiment, in the acquisition multiple position of sample GH4145 bolt on each position, before lee ' hardness value that repetitive measurement obtains and Rockwell hardness number, also comprise: adopt standard hardness block to calibrate for measuring the Leeb Hardness Tester of lee ' hardness value and the Rockwell hardometer for measuring Rockwell hardness number.
Describe the defining method of the Rockwell hardness number of above-mentioned GH4145 bolt in detail below in conjunction with concrete example, the method comprises:
Step 1: choose 14 sample GH4145 bolts, sample GH4145 bolt size, quality, surfaceness etc. meet the relevant requirement in GB/T17394-1998 " metal lee ' hardness test method " and GB-T230.1-2009 " metallic rockwell hardness test the 1st part: test method ".
Step 2: Leeb Hardness Tester and Rockwell hardometer are calibrated with standard hardness block. The calibration of Rockwell hardometer is according to standard GB-T230.2-2012 " metallic substance Rockwell hardness test the 2nd part: the inspection of sclerometer (A, B, C, D, E, F, G, H, K, N, T scale) and calibration ".
Step 3: measure on every root sample GH4145 bolt respectively with the qualified Rockwell hardometer of calibrating and Leeb Hardness Tester, test Rockwell hardness and the lee ' hardness at the thread surface of every root sample GH4145 bolt, screw thread heart portion, polished rod surface and four positions, polished rod heart portion respectively, the Rockwell hardness of each site tests 3, the lee ' hardness of 5.
Step 4: with the lee ' hardness mean value at multiple positions of all sample GH4145 bolts and corresponding Rockwell hardness mean value, generate corresponding to the lee ' hardness value at each position and the corresponding relation curve of Rockwell hardness number, concrete, generate and corresponding to the lee ' hardness value at each position described and the corresponding relation formula of Rockwell hardness number it is: HRC=0.080*HLD-4.1, wherein, HRC is Rockwell hardness, HLD is lee ' hardness value, 1. the scope of application: 440 < HLD < 530, 2. error=± 2.5%, concrete generating is as shown in table 1 corresponding to the lee ' hardness value at each position described and the mapping table of Rockwell hardness number, the corresponding relation curve generating the lee ' hardness value corresponding to each position described and Rockwell hardness number is as shown in Figure 2.
Such as, the Rockwell hardness mean value of No. 1 sample GH4145 bolt thread surface bench-mounted hardness tester test is 32.9HRC, is 469HLD with the lee ' hardness mean value of Leeb Hardness Tester test.
The Rockwell hardness mean value of No. 1 sample GH4145 bolt thread heart portion bench-mounted hardness tester test is 32.6HRC, is 455HLD with the lee ' hardness mean value of Leeb Hardness Tester test.
The Rockwell hardness mean value of No. 1 sample GH4145 bolt light rod surface bench-mounted hardness tester test is 35.3HRC, is 490HLD with the lee ' hardness mean value of Leeb Hardness Tester test.
The Rockwell hardness mean value of No. 1 sample GH4145 bolt light rod heart portion bench-mounted hardness tester test is 33.2HRC, is 466HLD with the lee ' hardness mean value of Leeb Hardness Tester test.
Analogize with this, then several groups of corresponding datas (such as 32.9HRC 469HLD, 32.6HRC 455HLD, 35.3HRC 490HLD, 33.2HRC 466HLD etc.) measured with each position generate the lee ' hardness value at each position and the corresponding relation curve of Rockwell hardness number, such as, the lee ' hardness value at thread surface place and the corresponding relation curve of Rockwell hardness number, the lee ' hardness value in screw thread heart portion and the corresponding relation curve etc. of Rockwell hardness number, this process can be completed by Origin software matching.
Step 5: the lee ' hardness value measuring multiple positions of GH4145 bolt to be measured, determines the Rockwell hardness number at multiple positions of GH4145 bolt to be measured according to corresponding relation curve.
Based on same invention design, the embodiment of the present invention additionally provides the determining device of the Rockwell hardness number of a kind of GH4145 bolt, as described in the following examples. The principle dealt with problems due to the determining device of the Rockwell hardness number of GH4145 bolt is similar to the defining method of the Rockwell hardness number of GH4145 bolt, therefore the enforcement of the determining device of the Rockwell hardness number of GH4145 bolt see the enforcement of the defining method of the Rockwell hardness number of GH4145 bolt, can repeat part and repeat no more. Following used, term " unit " or " module " can realize the software of predetermined function and/or the combination of hardware. Although the device described by following examples realizes with software goodly, but hardware, or the realization of the combination of software and hardware is also possible and is conceived.
Fig. 3 is a kind of structure block diagram of the determining device of the Rockwell hardness number of the GH4145 bolt of the embodiment of the present invention, as shown in Figure 3, comprising: acquisition module 301, calculating module 302, generation module 303 and determination module 304, be described this structure below.
Acquisition module 301, for obtaining each position at least two multiple positions of sample GH4145 bolt, lee ' hardness value that repetitive measurement obtains and Rockwell hardness number, described multiple position comprises: thread surface, screw thread heart portion, polished rod surface and polished rod heart portion;
Calculate module 302, it is connected with acquisition module 301, for calculating the average lee ' hardness value at each position described and average Rockwell hardness number;
Generation module 303, is connected with calculating module 302, for the average lee ' hardness value according to the multiple position of described sample GH4145 bolt and average Rockwell hardness number, generates corresponding to the lee ' hardness value at each position described and the corresponding relation curve of Rockwell hardness number;
Determination module 304, is connected with generation module 303, for measuring the lee ' hardness value at multiple positions of GH4145 bolt to be measured, determines the Rockwell hardness number at multiple positions of described GH4145 bolt to be measured according to described corresponding relation curve.
In an embodiment, each position refers to the region that each position comprises, and lee ' hardness value that on each position described, repetitive measurement obtains and Rockwell hardness number, comprising:
Each position is measured lee ' hardness value and Rockwell hardness number that many places obtain.
In an embodiment, the number that described at least two sample GH4145 bolts are sample GH4145 bolt is 14.
In an embodiment, also comprise: calibration module, for obtaining each position in the multiple position of sample GH4145 bolt, before lee ' hardness value that repetitive measurement obtains and Rockwell hardness number, standard hardness block is adopted to calibrate for measuring the Leeb Hardness Tester of lee ' hardness value and the Rockwell hardometer for measuring Rockwell hardness number.
In an embodiment, generation corresponding to the lee ' hardness value at each position described and the corresponding relation formula of Rockwell hardness number is: HRC=0.080*HLD-4.1, wherein, HRC is Rockwell hardness.
In embodiments of the present invention, for the characteristic of GH4145 bolt, by obtaining at least, the multiple position of sample GH4145 bolt is (such as, thread surface, screw thread heart portion, polished rod surface and polished rod heart portion) on each position, lee ' hardness value that repetitive measurement obtains and Rockwell hardness number, calculate the average lee ' hardness value at each position and average Rockwell hardness number, and according to the average lee ' hardness value at the multiple position of sample GH4145 bolt and average Rockwell hardness number, generate corresponding to the lee ' hardness value at each position and the corresponding relation curve of Rockwell hardness number, after the lee ' hardness value at multiple positions measuring GH4145 bolt to be measured, the Rockwell hardness number at multiple positions of GH4145 bolt to be measured can be determined according to above-mentioned corresponding relation curve, compared with the mode carrying out conversion Rockwell hardness in prior art according to GB/T17394, the deviation occurred when can reduce the Rockwell hardness number determining GH4145 bolt, False Rate can be reduced, minimizing actual hardness value is qualified but test data shows defective phenomenon, and then waste of material can be reduced, can also being calculated by lee ' hardness simultaneously and obtain Rockwell hardness, simplification operates, and reduces the damage to parts, is more suitable for the detection of on-the-spot in-service parts.
Obviously, the technician of this area should be understood that, each module of the above-mentioned embodiment of the present invention or each step can realize with general calculating device, they can concentrate on single calculating device, or it is distributed on network that multiple calculating device forms, can selection of land, they can realize with the program code that calculating device can perform, thus, they can be stored and perform by calculating device in the storage device, and in some cases, can to be different from the step shown or described by the execution of order herein, or they are made into respectively each integrated circuit modules, or the multiple module in them or step are made into single integrated circuit module realize.Like this, the embodiment of the present invention does not limit and combines in any specific hardware and software.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the embodiment of the present invention can have various modifications and variations. Within the spirit and principles in the present invention all, any amendment of doing, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the defining method of the Rockwell hardness number of a GH4145 bolt, it is characterised in that, comprising:
Obtaining at least two multiple positions of sample GH4145 bolt on each position, lee ' hardness value that repetitive measurement obtains and Rockwell hardness number, described multiple position comprises: thread surface, screw thread heart portion, polished rod surface and polished rod heart portion;
Calculate the average lee ' hardness value at each position described and average Rockwell hardness number;
Average lee ' hardness value according to the multiple position of described sample GH4145 bolt and average Rockwell hardness number, generate corresponding to the lee ' hardness value at each position described and the corresponding relation curve of Rockwell hardness number;
Measure the lee ' hardness value at multiple positions of GH4145 bolt to be measured, determine the Rockwell hardness number at multiple positions of described GH4145 bolt to be measured according to described corresponding relation curve.
2. the defining method of the Rockwell hardness number of GH4145 bolt as claimed in claim 1, it is characterised in that, each position refers to the region that each position comprises, and lee ' hardness value that on each position described, repetitive measurement obtains and Rockwell hardness number, comprising:
Each position described is measured lee ' hardness value and Rockwell hardness number that many places obtain.
3. the defining method of the Rockwell hardness number of GH4145 bolt as claimed in claim 1, it is characterised in that, the number that described at least two sample GH4145 bolts are sample GH4145 bolt is 14.
4. the defining method of the Rockwell hardness number of GH4145 bolt as claimed any one in claims 1 to 3, it is characterized in that, obtaining at least two multiple positions of sample GH4145 bolt on each position, before lee ' hardness value that repetitive measurement obtains and Rockwell hardness number, also comprising:
Standard hardness block is adopted to calibrate for measuring the Leeb Hardness Tester of lee ' hardness value and the Rockwell hardometer for measuring Rockwell hardness number.
5. the defining method of the Rockwell hardness number of GH4145 bolt as claimed any one in claims 1 to 3, it is characterized in that, generate and corresponding to the lee ' hardness value at each position described and the corresponding relation formula of Rockwell hardness number it is: HRC=0.080*HLD-4.1, wherein, HRC is Rockwell hardness, and HLD is lee ' hardness.
6. the determining device of the Rockwell hardness number of a GH4145 bolt, it is characterised in that, comprising:
Acquisition module, for obtaining each position at least two multiple positions of sample GH4145 bolt, lee ' hardness value that repetitive measurement obtains and Rockwell hardness number, described multiple position comprises: thread surface, screw thread heart portion, polished rod surface and polished rod heart portion;
Calculate module, for calculating the average lee ' hardness value at each position described and average Rockwell hardness number;
Generation module, for the average lee ' hardness value according to the multiple position of described sample GH4145 bolt and average Rockwell hardness number, generates corresponding to the lee ' hardness value at each position described and the corresponding relation curve of Rockwell hardness number;
Determination module, for measuring the lee ' hardness value at multiple positions of GH4145 bolt to be measured, determines the Rockwell hardness number at multiple positions of described GH4145 bolt to be measured according to described corresponding relation curve.
7. the determining device of the Rockwell hardness number of GH4145 bolt as claimed in claim 6, it is characterised in that, each position refers to the region that each position comprises, and lee ' hardness value that on each position described, repetitive measurement obtains and Rockwell hardness number, comprising:
Each position described is measured lee ' hardness value and Rockwell hardness number that many places obtain.
8. the determining device of the Rockwell hardness number of GH4145 bolt as claimed in claim 6, it is characterised in that, the number that described at least two sample GH4145 bolts are sample GH4145 bolt is 14.
9. the determining device of the Rockwell hardness number of GH4145 bolt as according to any one of claim 6 to 8, it is characterised in that, also comprise:
Calibration module, for obtaining each position in the multiple position of sample GH4145 bolt, before lee ' hardness value that repetitive measurement obtains and Rockwell hardness number, standard hardness block is adopted to calibrate for measuring the Leeb Hardness Tester of lee ' hardness value and the Rockwell hardometer for measuring Rockwell hardness number.
10. the determining device of the Rockwell hardness number of GH4145 bolt as according to any one of claim 6 to 8, it is characterized in that, generate and corresponding to the lee ' hardness value at each position described and the corresponding relation formula of Rockwell hardness number it is: HRC=0.080*HLD-4.1, wherein, HRC is Rockwell hardness, and HLD is lee ' hardness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410658004.9A CN105675417A (en) | 2014-11-18 | 2014-11-18 | GH4145 bolt Rockwell hardness value determination method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410658004.9A CN105675417A (en) | 2014-11-18 | 2014-11-18 | GH4145 bolt Rockwell hardness value determination method and apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105675417A true CN105675417A (en) | 2016-06-15 |
Family
ID=56944228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410658004.9A Pending CN105675417A (en) | 2014-11-18 | 2014-11-18 | GH4145 bolt Rockwell hardness value determination method and apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105675417A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107421830A (en) * | 2017-09-25 | 2017-12-01 | 中国航发哈尔滨轴承有限公司 | A kind of Vickers hardness for 8Cr4Mo4V steel and Rockwell hardness conversion method |
| CN109406322A (en) * | 2018-09-14 | 2019-03-01 | 华电电力科学研究院有限公司 | Live hardness determination Piglet s colibacillosis method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006220496A (en) * | 2005-02-09 | 2006-08-24 | Mitsutoyo Corp | Hardness testing machine |
| CN102478474A (en) * | 2010-11-26 | 2012-05-30 | 王严岩 | Hardness testing method and usage thereof |
| CN102749257A (en) * | 2011-04-20 | 2012-10-24 | 华北电力科学研究院有限责任公司 | Hardness measurement method of steel steam pipeline and system thereof |
-
2014
- 2014-11-18 CN CN201410658004.9A patent/CN105675417A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006220496A (en) * | 2005-02-09 | 2006-08-24 | Mitsutoyo Corp | Hardness testing machine |
| CN102478474A (en) * | 2010-11-26 | 2012-05-30 | 王严岩 | Hardness testing method and usage thereof |
| CN102749257A (en) * | 2011-04-20 | 2012-10-24 | 华北电力科学研究院有限责任公司 | Hardness measurement method of steel steam pipeline and system thereof |
Non-Patent Citations (3)
| Title |
|---|
| 中国电力出版社《中国电力百科全书》编辑部: "《中国电力百度全书 火力发电卷》", 31 January 2001, 中国电力出版社 * |
| 杨辉其: "《新编金属硬度试验》", 30 November 2005, 中国计量出版社 * |
| 胡建钢 等: "《电力工程 建设设备监理手册》", 31 October 2003, 中国电力出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107421830A (en) * | 2017-09-25 | 2017-12-01 | 中国航发哈尔滨轴承有限公司 | A kind of Vickers hardness for 8Cr4Mo4V steel and Rockwell hardness conversion method |
| CN109406322A (en) * | 2018-09-14 | 2019-03-01 | 华电电力科学研究院有限公司 | Live hardness determination Piglet s colibacillosis method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Salvati et al. | Generalised residual stress depth profiling at the nanoscale using focused ion beam milling | |
| CN108844824B (en) | Known material residual stress measuring method based on conical pressure head | |
| CN103049596A (en) | Method for improving reverse engineering accuracy of impeller part | |
| CN104655505B (en) | Instrumented-ball-pressing-technology-based residual stress detection method | |
| US3908447A (en) | Method of measuring article fatigue life | |
| CN115356121A (en) | Method for evaluating damage of service life and residual service life of turbine blade in service environment | |
| CN105675417A (en) | GH4145 bolt Rockwell hardness value determination method and apparatus | |
| CN109870258B (en) | Instrumented spherical indentation detection method for plane random residual stress | |
| Goldsmith et al. | Analysis and interpretation of aircraft component defects using quantitative fractography | |
| Zhou et al. | Improved reliability analysis method based on the failure assessment diagram | |
| CN105675421A (en) | GH4145 bolt Brinell hardness value determination method and apparatus | |
| CN107024401A (en) | Obtain the method and system of metal material anisotropy and tension and compression asymmetry | |
| JP2014142304A (en) | Life evaluation method for austenite stainless steel | |
| CN109492323B (en) | High-precision inverse calculation method for initial residual stress of blank based on deformation test | |
| Arief et al. | Calibration of vickers hardness test pt. tenaris seamless pipe indonesia jaya cilegon using standar blok | |
| Gürel et al. | Uncertainty calculations and calibration of metal hardness testing equipment | |
| Haleel et al. | Gage Repeatability and Reproducibility Study | |
| Vladimír et al. | The methodology of transformation of the nominal loading process into a root of notch | |
| Pástor et al. | Development of the Device with a High Positioning Accuracy Serving for Residual Stress Quantification using Optical Methods | |
| CN103604913B (en) | Quantitative analysis high-efficiency proofreading method of digital metal element base of metal nondestructive testing | |
| CN115326846B (en) | Quality evaluation method for additive manufacturing component | |
| CN111537127B (en) | Full-range calibration method of X-ray stress gauge | |
| CN115773930A (en) | Uncertainty evaluation method for room temperature tensile test result of aviation material | |
| CN105588773A (en) | Method and apparatus for obtaining Brinell hardness of nickel-based high temperature alloy | |
| CN116337991A (en) | Manufacturing method of nondestructive testing calibration tube containing axial cracks |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160615 |