National Metrology Verification Regulations of the People's Republic of China JIG112—2003
Metallic Rockwell Hardness Testers
A, BC, DE, F, G, HK, N, T scale
Metallic Rockwell Hardness Testers (Snsles A., R, C. D, E. F, G, H, K, N, T)2003 09 - 23 Issued
2004-03-23 Implementation
The General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China issued JJG112—2003
Metallic Rockwell Hardness Testers (A, B,
CDEFGHK
N, T scale) Verification Regulations
Yeriflcatlon Kegulation of Metallic Rockwell Hardness Testers [Scaley A, B, CD, E, F, G, H, K, N, T
JJG 112—2003
Replaces JJG 112—1991
J.IG 152—1991
JJG 334--1993
(Part of the content)
This regulation was approved by the National Quality Supervision and Inspection and Quarantine Administration on September 23, 2003 Approved on, and implemented on March 23, 2004
Responsible unit:
Main drafting unit:
Participating units:
National Technical Committee on Force and Hardness Metrology, China Kehua Institute of Metrology
Guangdong Yan Metrology Science Research Institute
Shandong Laizhou Testing Machine Factory
Shanghai Materials Testing Machine Factory
South China Metrology and Testing Institute
This regulation is entrusted to the National Technical Committee on Force and Hardness Metrology to contribute to the interpretation. The main drafters of this regulation are:||tt ||Zhang Jinling
Zhou Peixian
Saiga drafter:
Yang Fengming
Sang Peijun
Gong Guangjun
JJG112—2003
Shanyin Rangguan Scientific Research Institute)
(China Institute of Metrology)
(Eastern Province Metrology Science Institute)
(Shandong Laizhou Wuyantao General)
(Shanghai Material Testing Machine Factory)
(Henan Province Metrology and Testing Institute)
References
Metrological performance requirements
Verticality and coaxiality of ten axes
Test force
Pressure detection measuring device...
Frame deformation
.........
IIG112—2003
Maximum allowable error of indication and repeatability of indication 5 General technical requirements.....
Control of measuring instruments
6.1 Verification conditions
6.2 Verification items and verification methods
6.3 Treatment of verification results..
6.4 Verification procedures for surface-mounted metal Rockwell hardness testers (A, B, C, P, E, F, G, H, K, N, T scales)
This procedure applies to the initial verification, subsequent verification and inspection of used coins of surface-mounted metal Rockwell hardness testers (A, B, C, D, E, E, C, HK, N, T scales). 2 References
This specification references the following documents:
ISt 65[R - 1 Matallin malerials - Rockwell hardners lest-part 1: Test method (acale3 A, B, C, D, E, F, G、H, K, N. TiGB/T230.2-2002 Jinpingji hardness test Part 2: Inspection and calibration of hardness tester (A, B, C, D, 5, FG, H, K, N, T scale) GB/T230.3-2002 Rockwell hardness test Part 3: Calibration of standard hardness block (A, B, C, D, E, F, G, H, K, N, I scale) GB/T230-1991 Rockwell hardness test method CB/T4340.1-1999 Vickers hardness test for metals Part 1: Test method JJC144-1992 Standard hardness tester verification procedure When using this procedure, attention should be paid to the use of the current valid version of the above-mentioned referenced documents. 3 Overview
Jinpingji hardness tester (hereinafter referred to as hardness tester) is suitable for the hardness determination of various metal materials. Its test principle is to press the indenter into the sample surface under the action of the initial test force and the total test force F, and then unload it. In addition to the card test force F1: measure the positive mark when retaining the initial test force. The calculation formula of the Rockwell hardness and the Jeep scale are shown in Table 1: 4 Metrology performance requirements
4.1 Axis verticality and coaxiality
4.1.1 The coaxiality between the purity meter card axis and the test table surface should not be greater than 0.2/100. 4.1.2 The coaxiality between the axis of the hardness tester lifting screw and the axis of the main shaft should not be greater than 0.3mm. 4.2 Hardness tester test force ||tt| |4.2.1 The maximum allowable error of the initial test force F. (before and after the main test force F. is applied) is ±2.0%. 4.2.2 The maximum allowable error of the total test force should be ±1.% 4.3 Head
4.3.) Diamond indenter (A, D, N scale) 4.3.1.1 The top spherical surface of the diamond two-dimensional surface should be polished within 0.3mm from the top, and its surface roughness R, not more than 1
JG 1122003
0.2, the two pages of the case are completely cut, the heart should be accurate to crack this, sand roots, corners and scratches and other surface effects: Table 1
Jade head burning
Scale symbol
THR451
Mingdi Shihe Hall
Jindi Baizhou Details
Jinshizhou Sales
Tian$3. 175mm
xp1.5875mm
1.5875mmt
Ball$3.175nlm
Ball53.175mm
Gold in the same sales
Gold has round auxiliary
Gold inner stone cone
Ballg1.5875jum
Ballg1.585r- ur
ball$1.575rum
test force
Rockwell hardness scale
+test force
total test
inversion value
calculation formula
10#-0.002
130-21.0m2
Note: 1. When using the alloy effective indenter. The number surface should be "w\, HRHW. 2. After the main breaking of the gold text, the effect of the residual will be released under the test: use the standard
(20-88)IR
(20 ~100) IRB
(20 -0) RC
(40 - 77) IRD
(7) .- 1()) HRE
(-I) HRF
(30 - 94) HRC
(8~100) RHI
(40-100) IK
(70 -94) HR15N
(42-86) HR30N
:(20 ~77)[IR45N
(67 -- 93) IIR1ST
(29 - 32) TITHOT
(10 - 72) HH45T
4.3.1.2 The parts should be firmly installed in the steel head, without any gaps or holes, and ensure that the steel head and the metal body do not cause any damage under the maximum test force. The hardness should be more stable at 02HR. 4.3.1.3 The steel should be (120+0.35) before the quenching, and the length of the cut wire should be 0.4mm.
1. 3.1.1 The inclination angle between the diamond body axis and the indenter (vertical to the indenter) should not exceed .50
4.3.1.3 The half-mean value of the ...Head (B, E, F, C, H, E, T scale; steel ball surface magnetic quality gold ball? 4.2.1 Ball should be light: 11 surface south. Its surface is accurate to slide section R, large ten 0.2u. 2
JJG112-2003
4.3.2.7 The length of the piece is allowed to be different from Table 2. Table 2 The maximum allowable error of the ball diameter
You Medical Exhibition Standard
Children Check Line/n
3.2.3 The request or the taste of the court is not less than the request from the diameter of the alloy ball to make the Apple hardness of the alloy ball not false low, 4.4 The depth of the indentation is closely measured and the bottom of the installation
personal error/amm
± [.00.35
·'s medical quality acceptance is one place
4.4.1 For (4~) scale: K limit depth tracking device number printing error -0.n: V and T scale maximum allowable error is +, mm, that is.5.
block meter under the test force recorded by the child, the machine channel length change is enough to affect the sample position, for the chain meter with no chain tightness, it should not exceed.51R; for the point quality of the locking device, it should be 0.5HH4. The maximum allowable reading difference of the indication value and the repeatability of the indication value are shown in Table 3. Table 3 Maximum allowable error and indication value repeatability of the meter indication value are marked with the degree of
120 - 751 HA
1>75 -88) H44
(-4)HRR
45-6CRB
20~7C1R0
(40 - 10) HRT!
>0-7?][D
7-90 IHF:
90 -1003HRK
Indication value
.3IIRE
+7HRT5
Reactivity
--0. (13 - H)
0.02 (1-)
0.0%（100)
5 Hardness scale
JJG112—2803
Table 3 (continued)
International standard carbon content range
(-90)HR
(>90 - 100) HRF
(30-50) HRC
(>50 -75) HRG
(>75 --4) HR
(80 -100) HRH
(40 - 60) [IRK
(>0~) HKK
(>) -1(n) HK
Free: 1. H5 point current degree 2 purchase weight.
2. When there are two people, choose one of them.
General technical requirements
Maximum allowable error of indication
±3HtF
±2HRH
±3HRK
±2HRN
±3HHT
Indication or property
=0.04 (130 - )
±0.04（130 -）
±0.04(130 -)
=0.04 (100 -)
or 1.2HR
≤0.06 (100 -)
The hardness tester shall have a nameplate, on which shall be indicated the product name, specification model, number and year of manufacture; a newly manufactured hardness tester shall also have a mark.
The hardness tester should be equipped with a standard hardness block with a hardness range. 5.2 The hardness tester should be properly installed on a stable foundation. 1, and adjusted to a level of 1mm/m. 5.3 The indenter should be firmly installed in the spindle hole. 5.4 The spindle, force lever, lifting screw, buffer mechanism, indentation probe measuring cover, etc. of the hardness tester should work normally and flexibly: the screw should not shake: the test force should be added and unloaded smoothly, without impact, and should not affect the reading. 5.5 The test bench should be firmly installed on the screw, and the test bench surface should be smooth and flat. 5.6 The electrical equipment should be in good condition. 5. Test cycle time
The test cycle time is the initial test force holding time, the soil test force time, and the total test force holding time. The maximum allowable error of each test cycle time is ±0.5%. 6. Measuring instrument control
Measuring instrument control includes: initial calibration, subsequent calibration and in-use verification, 4
6.1 Calibration conditions
6.1.1 Environmental conditions
JJG112—2003
The hardness tester is calibrated under the environmental conditions of (23±5). When calibrating outside this temperature range, it should not be lower than 10%℃ and should not be higher than 35℃. The calibration excess should be noted in the calibration record or calibration certificate. The surrounding environment should be clean, free of vibration and corrosive gas: 6.1.2
See Table 4 for calibration instruments.
Table 4 Measuring tools for calibration
Calibrating items
Hardness test: Verticality of main axis and
Test bench surface
Coaxiality of lead screw shaft and
Axis of test
Initial test force
Total test force
Indentation of hardness tester
Appearance of indenter
Inspection of indenter quality
Improper brushing
Diamond indenter edge radius
Gold cone
JK indenter value difference
Indenter surface roughness
Ball hardness items
Horizontality of indenter
Right-angle ruler
Display display environment
Standard force gauge
Standard small instrument
Deep variable mutual control tester
Hardness decision
Ball indenter
Standard hardness block
Tool microscope
Hardness block
Sea instrument
Projection device or other device
Line sample
Fallstone meter
Standard tape indicator
Standard hardness block
Qiansha display tester
Positive optical meter
Vickers medical instrument
Level agreement
Verification equipment
Technical requirements
With a precision not more than 0.mn, effective tolerance 100mmt1 level
(0.02-1) mm
division value 0.01numl
≥60HRC
0.3, with return value
uncertainty U.2,um (= 2), measurement group 0.32mm≥60HRG
point diameter is not less than 10mm
hardness can be divided into test force by seeing Table 8
division and 0.16
not less than
≥OHRG
division value 1°
200 with 1
line error not greater than (0.5- 1.0)m
. Maximum allowable error: ".0" total test: Maximum allowable error: ±0.5%
Rockwell K head indication error: ±0.4IIR table 6.1, 6.2
Uncertainty: 5%~22% (increase ±9)
Indication error: ±0.25m
Test force: 98.07N; Maximum allowable error of indication: ±3% Graduation value: 0.2mum/m ||tt| |6. Test items and test methods
bzxZ.netTest items are shown in Table 5-
Test items
Test bench combination and accuracy
Lifting screw auxiliary and rail track extraction speed
Test force of the test bench
Total test force
Test result
Movement of the sample and deformation of the rack
Hardness tester indication
J.IG 112—2003
List of fixed items
Second calibration
Note: For more items to be inspected, the "+" state can be omitted. The subsequent calibration of the meter shall be carried out in accordance with the methods of 6.2.1, 6.2.7 and 6.2.8 of the metrological control system: the indication value shall be calibrated and adjusted in accordance with the methods of 6.2.4, 6.3.5 and 6.2.6 of the metrological control system. 6.2.1 Section 5 of this Regulation shall be inspected through actual operation. After inspection, it shall meet the requirements and then conduct the effectiveness determination of other items. 6.2.2 The main calibration plate of the meter and the test object shall be firmly installed in ten places, and the angle ruler and the ruler shall be leveled upwards at two points. The measured value shall meet the requirements of 4.11. The evil request 3 leads to the lowering screw shaft and the rail line coaxiality inspection model. The degree of effect is recorded on the platform, and the water station will be slow on the ground. The stop will be determined by the breaking degree, and the degree will be produced in the same color as the platform: the same way, under the condition of strict coverage of the hard tiger block and the platform, the test platform is rotated, and a giant pump is made on the hard forget position. A total of four indentations are made, and the distance between the two relative marks is measured. The maximum distance should be derived from the requirements of 12. 6.2.4 Test for verification
line.2..1 Initial test force inspection
Put down the pressure head and release the standard test force. At this time, for the strong card period axle load, the double jade is tilted. The test party needs to calibrate the test force. When the test force is planned, use a dynamometer of .07V or 1.1N: the initial test after the main test is completed is 54, or 07. The force measurement assumption is 2 during the calibration. This test is carried out 3 times each. The test error is calculated using the formula (1):
Formula: F-Test force error:
IJG 112—203
-×100%
K. —The standard dynamometer indication corresponding to the test is: K——the reading with the largest difference from the 3 readings. The verification results F shall all meet the requirements of 4.2.1. 6.2.4.2 Total test force
Put the dynamometer on the test bench, clamp the auxiliary line of the shaft, pre-press 3 times, adjust the dynamometer to zero position, and whenever possible: the total test force shall be verified at least 3 positions at certain intervals within the entire movement range of the spindle during the test. During the verification, the movement direction of the spindle shall be consistent with the movement direction during the test. Measure 3 times at each position of the spindle. The total test force error is calculated according to formula (1). The verification results shall all meet the requirements of 4.2.2. 6 .2.5 Determination of the positive head
6.2.5.1 Appearance inspection of the diamond positive head (A, C, D, N scale):
The surface state of the working part of the diamond positive head shall be observed with a microscope of not less than 50 times; the surface roughness of the diamond shall be measured with an interference microscope, which shall meet the requirements of Table 4.3.1.1. 1. Use a hardness center of not less than 60HRC and test the indentation 1D times under the test force of 1471N. The first 3 times shall be ignored and the indication of the last 7 times shall be within the range of .2111. The result shall meet the requirements of Table 4.3.1.2.) Measurement of the cone angle: Use a measuring device to measure the cone angle (0°, 60°, 120°) on the three cut surfaces of the indenter. Each load shall be measured twice, and the average value shall be the cone angle of the section. The average of the three cross-section circular angles is the cone angle of the diamond indenter. The result should meet the requirements of 4.3.1.3.) The inclination angle between the axis of the diamond cone and the axis of the indenter handle is measured with a tool microscope. The workbench and the measuring mirror are placed at zero position. On the workbench or on the workbench, place the calibration sample in the V-shaped groove so that the calibration generatrix coincides with the vertical line of the crosshairs in the goniometer. Fix the V-shaped groove, remove the calibration sample, place the indenter in the groove so that the axis of the indenter handle coincides with the vertical line of the crosshairs, and rotate the goniometer drum so that the horizontal line of the crosshairs coincides with the generatrix of the indenter body (box 1). Measure the angle, (-)/2 is the inclination angle between the axis of the diamond cone and the axis of the indenter handle, which should meet the requirements of 4.3.1.4. Note: 180<a, 1e,) e) Measurement of spherical radius: Use a projector or other instrument with a magnification of not less than 200 times to measure, compare the projection of the spherical surface of the indenter with the curve template, rotate the indenter around the axis, measure the spherical radius on 4 sections of 0°, 45°, 90° and 135°, measure each section twice, and the half-value is the spherical radius of the section: the average of the single diameters of the spherical surface of the 4 sections is the spherical radius of the diamond indenter, and the result should meet the requirements of 4.3.1.5. The hardness indication verification of diamond indenter is carried out on at least 4 standard blocks. The hardness range of the 4 standard blocks is shown in Table 6.1-
. The hardness range of the standard blocks used for the hardness indication verification of diamond indenters using A, C scale or N scale is shown in Table 6.2.
Indenter type
Gradient indenter
C, A scale
Rockwell indenter
N scale
JJG 112—2003
Angle measuring scale
Diamond grid indenter
Figure 1 Schematic diagram of diamond round body tilt angle measurement Table 6, Degree range of standard block for calibrating diamond surface indenter indication National scale
(20 ~ 26) HRC
[S2 ~ 58] HRC
(40 -46) IR45N
(88 -- 4) HR15N
Hardness range of standard block for calibrating diamond surface indenter indication Table 6.2
Hardness range
(2n -. 26) HRG
(40 - 50) HRC
(60 ~ 65) HRC
[8085]1LA
(63 - 70) HR45
(42 ~54) HR30
(74 ~B0)HR309
(88~94) IIRI5
For each standard block, the difference between the average hardness value obtained by three indentations made by the indenter under test and the shear hardness value of the standard indenter shall meet the requirements of 4.3.1.6. The indentations made by the indenter under test and the indentations made by the standard indenter shall be adjacent. 6.2.5.2 Ball indenter (spherical ball or hard alloy (B, E, F, C, H, K, T scale)) The surface roughness of the ball shall be measured with a dry sandpaper. The result shall meet the requirements of 4.3.2.1. The diameter shall be measured at not less than 3 positions. The difference between the ball diameter and its nominal diameter shall meet the requirements of Table 2 of 4.3.2.2.4 requirements Note: 180<a, 1e,) is the needle angle between the indenters, e) Measurement of the semi-radius of the spherical surface: Use a projector or other instrument with a magnification of not less than 200 times to measure the spherical surface, compare the projection of the spherical surface of the indenter with the curve template, rotate the indenter around the axis, measure the spherical radius on 4 sections at 0°, 45°, 90° and 135°, measure each section twice, and the half-radius is the spherical radius of the section: the average single diameter of the spherical surface of the 4 cut surfaces is the spherical radius of the diamond indenter, and the result The requirements of 4.3.1.5 shall be met. The hardness indication verification of diamond indenter shall be carried out on at least 4 standard blocks. The hardness ranges of the 4 standard blocks are shown in Table 6.1. The hardness ranges of the standard blocks used for the hardness indication verification of diamond indenters using A, C or N scales are shown in Table 6.2. 112—2003
Angle measuring scale
Diamond grid indenter
Figure 1 Schematic diagram of diamond round body tilt angle measurement Table 6. Range of standard blocks for calibrating diamond surface indenter indication National scale
(20 ~ 26) HRC
[S2 ~ 58] HRC
(40 -46) IR45N
(88 -- 4) HR15N
Hardness range of standard blocks for calibrating diamond surface indenter indication Table 6.2
Hardness range
(2n -. 26) HRG
(40 - 50) HRC
(60 ~ 65) HRC
[8085]1LA
(63 - 70) HR45
(42 ~54) HR30
(74 ~B0)HR309
(88~94) IIRI5
For each standard block, the difference between the average hardness value obtained by three indentations made by the indenter under test and the shear hardness value of the standard indenter shall meet the requirements of 4.3.1.6. The indentations made by the indenter under test and the indentations made by the standard indenter shall be adjacent. 6.2.5.2 Ball indenter (spherical ball or hard alloy (B, E, F, C, H, K, T scale)) The surface roughness of the ball shall be measured with a dry sandpaper. The result shall meet the requirements of 4.3.2.1. The diameter shall be measured at not less than 3 positions. The difference between the ball diameter and its nominal diameter shall meet the requirements of Table 2 of 4.3.2.2.4 requirements Note: 180<a, 1e,) is the needle angle between the indenters, e) Measurement of the semi-radius of the spherical surface: Use a projector or other instrument with a magnification of not less than 200 times to measure the spherical surface, compare the projection of the spherical surface of the indenter with the curve template, rotate the indenter around the axis, measure the spherical radius on 4 sections at 0°, 45°, 90° and 135°, measure each section twice, and the half-radius is the spherical radius of the section: the average single diameter of the spherical surface of the 4 cut surfaces is the spherical radius of the diamond indenter, and the result The requirements of 4.3.1.5 shall be met. The hardness indication verification of diamond indenter shall be carried out on at least 4 standard blocks. The hardness ranges of the 4 standard blocks are shown in Table 6.1. The hardness ranges of the standard blocks used for the hardness indication verification of diamond indenters using A, C or N scales are shown in Table 6.2. 112—2003
Angle measuring scale
Diamond grid indenter
Figure 1 Schematic diagram of diamond round body tilt angle measurement Table 6. Range of standard blocks for calibrating diamond surface indenter indication National scale
(20 ~ 26) HRC
[S2 ~ 58] HRC
(40 -46) IR45N
(88 -- 4) HR15N
Hardness range of standard blocks for calibrating diamond surface indenter indication Table 6.2
Hardness range
(2n -. 26) HRG
(40 - 50) HRC
(60 ~ 65) HRC
[8085]1LA
(63 - 70) HR45
(42 ~54) HR30
(74 ~B0)HR309
(88~94) IIRI5
For each standard block, the difference between the average hardness value obtained by three indentations made by the indenter under test and the shear hardness value of the standard indenter shall meet the requirements of 4.3.1.6. The indentations made by the indenter under test and the indentations made by the standard indenter shall be adjacent. 6.2.5.2 Ball indenter (spherical ball or hard alloy (B, E, F, C, H, K, T scale)) The surface roughness of the ball shall be measured with a dry sandpaper. The result shall meet the requirements of 4.3.2.1. The diameter shall be measured at not less than 3 positions. The difference between the ball diameter and its nominal diameter shall meet the requirements of Table 2 of 4.3.2.2.
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