Related Manuals for MRC HR-150AS
Summary of Contents for MRC HR-150AS
- Page 1 Digital Display Manual Rockwell Hardness Tester HR-150AS 3, Hagavish st. Israel 58817 Tel: 972 3 5595252, Fax: 972 3 5594529 mrc@mrclab.com MRC. 10.23...
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Page 2: Table Of Contents
Contents 1, Summary…………………………………………………………………………1 2, Application of hardness meter…………………………………………………2 3, Main technical parameters………………………………………………………3 4, Performance indicators ………………………………… …………………4 5, Use instructions……………………………………………… …………………4 6, product appearance…………………………………………… ………………5 7, Introduction of mechanism performance…………………… …………………6 ………………… …………………7 8, Installation of hardness meter………… 9, Methods of operation and precautions………………………… ………………7 10, maintenance and calibration of hardness meters………………... -
Page 3: 1, Summary
I Summary 1, What is Hardness It is the ability of material to resist elastic deformation, plastic deformation or destructive force. For indentation hardness tests, hardness is the ability of a substance to resist the indentation of another harder object of a certain shape and size into its surface. 2, The principle of Rockwell hardness Test The Rockwell hardness measurement method is to press the test force F1 into the surface of the specimen under the action of two test forces (initial test force Fo and total... -
Page 4: 2, Application Of Hardness Meter
Application of Hardness Tester Rockwell hardness test can choose different pressure head and test force according to the range of，material hardness and different test thickness, and use different scale to express it. The most commonly used scale is Agni Bian C scale. The test force and pressure head of common scale are given in the following table. -
Page 5: 3, Main Technical Parameters
HRA：Suitable for the determination of metals whose hardness exceeds 70HRC, such as tungsten carbide, cemented carbides, hard sheet materials and surface hardened materials. HRB：Used for the determination of soft or medium hardness materials such as non-ferrous metals and their alloys, annealed steel or unhardened steel products. HRC：Used to determine the hardness of heat-treated steel products such as carbon steel, tool steel and alloy steel. -
Page 6: 4, Performance Indicators
Direction for use Initial Status If exceed 305, Increase Test Anvil and Touches then redo it Indenter, start initial fore displays 295-305 If index to 0, then Start main force, redo it then timing Reach to set time, unload abnormal value, main force, show hardness redo it... -
Page 7: 6, Product Appearance
Product appearance 1、ZERO/ON keystroke: short press reset, long press shut down; 2、Set key: short press select scales, long press clock setting; 3、CLR key: short press clear current measurement data; 4、Out key: long press output data;(recording data to a predetermined number of effective) 5、... -
Page 8: 7, Introduction Of Mechanism Performance
1、conversion units 8、force applied 2、 conversion results 9、unit of force 10、Mean value mark 3、Time indication 4、Unit conversion mark 11、surveyor's rod type 5、 power shortage alert 12、Surface Rockwell type supplement 6、hardness value 13、average total 7、head type 14、average current count Print output format Hardness data output to printer or computer in ASCII code, baud rate 38400,n,8,1，The output format is as follows：... -
Page 9: 8, Installation Of Hardness Meter
Brief introduction of Mechanism performance The hardness gauge consists of a fuselage, a test force applying mechanism, a measuring indicator mechanism and a test piece support mechanism (see figure The fuselage is a closed shell. Except for the table, the lead screw and the handling handle, the other mechanisms are all installed in the fuselage shell to keep clean. - Page 10 counterclockwise, and the main test force can be fully applied when the ring is supported by a small knife (20) at the end of a large lever during the descent. The measuring index mechanism is composed of a small lever (21), a lever (5), an adjusting plate (22), a connecting rod (23) and an indicator (24), etc.
- Page 11 （8）、release of small lever fastening cord (4) （9）、 turn the handwheel (1) to lower the lead screw (2) and remove the pressure head pad (3). 2、Unload the screw protector (30) with kerosene to wash the rust oil from the lead screw, handwheel, etc., then pour a small amount of lubricating oil into the contact place between the screw and the handwheel, and reapply the screw protection suit.
- Page 12 and the spindle face. （4）、Preparation and selection of specimen The specimen should have a certain size and thickness, and the distance between the adjacent indentation center and the edge of the specimen should be more than 3 mm, and the minimum thickness of the specimen should not be less than eight times of the indentation depth.
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Page 13: 10, Maintenance And Calibration Of Hardness Meters
The table surface of the specimen must be polished or polished, the roughness of the table surface shall be not less than 1.6, and the hardness of the material shall not be affected during processing, that is, the working-hardening or tempering should not occur, the roughness of the table surface of the supporting surface shall not be less than 3.2, and the working face of the specimen, The supporting surface and the working table surface should be clean and free from oil pollution. -
Page 14: 11, Statement Of Status
② Wipe the test piece support surface and place it on the workbench. Rotate the handwheel (27) to make the table rise slowly, and push up the indenter. The small pointer to the indicator points to the red dot, and the large pointer rotates three times vertically upwards (allows a difference of ±... - Page 15 environment with a temperature of 25 ±10 ℃. 2、Cover the machine with a dust-proof cover when the hardness meter is not used for a long time. 3、Regular injection of a small amount of oil at the interface between the lead screw (26) and the handwheel (27). 4、If it is found that the indication error of the hardness meter is large, (1) the worktable can be removed to check whether the contact surface with the lead screw is clean;...
- Page 16 front and back position of the plate (22). The method is to loosen two M 3 screws on the adjusting plate (22) and move the position of the adjusting plate (22) back and forth. Note that when moving toward the indicator direction, the indication value increases, otherwise the value decreases.
- Page 17 measurement. 4、Remove the main test When the timing time comes, the main test can be removed, the second time display disappears, the HRC symbol is lit up, the hardness meter starts to show the actual hardness value, at this time, the system will show the maximum value recorded in the measurement process;...
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Page 18: 12, Packing List
as shown in the figure： The position of the dot matrix is Ytable year, the third row is the year. Of which "14" flashed， Short press or long press [CLR] to add 1; continue to press SET shortly The keys will flash M, D, H, m in sequence. Time division, short press in the process [CLR] key corresponds to flashing data plus 1, long press [CLR] button can be added quickly;... -
Page 19: 13, Certification
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Page 20: 14, Warranty Card
页... - Page 21 list Rockwell hardness gauge packing Serial Quantit name specification unit number Rockwell hardness XRock-S304 station bigWorkbench smallWorkbench VWorkbench Diamond cone indenter 120° φ1.588mm Steel ball indenter φ1.588mm Steel ball StandardRockwellhardne 85-100HRB Piece ss block StandardRockwellhardne 60-70 HRC Piece ss block StandardRockwellhardne 20-30HRC Piece...
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