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|Place of Origin:||Beijing China|
|Minimum Order Quantity:||1 piece|
|Packaging Details:||Wooden box|
|Delivery Time:||5-8 work days|
|Payment Terms:||T/T, Western Union,PayPal|
|Supply Ability:||50units per month|
|Preliminary Testing Force:||29.4N，tolerance±2.0%||Testing Force:||147N、294N、441N，tolerance±1.0%|
|Measuring Range:||HR15N：70-91、HR30N：42-80、HR45N：20-70、 HR15T：73-93、HR30T：43-82、HR45T：12-72||Display:||Mechanical Dial|
|Rockwell Scale:||HR15N 、HR30N 、HR45N 、HR15T 、HR30T 、HR45T||Distance Of Indenter To Outer Wall:||165mm|
|Dimensions:||510*212*700mm||Main Unit Weight:||65kg|
Classic Dial Digital Hardness Tester , High Accurate Surface Rockwell Hardness Machine
Mitech MHR-45 A Rockwell Hardness Surface Test is a machine for tapering diamond or hard indenter alloy by pressing the surface of the sample to produce the recess of the material to achieve hardness measurement of the material by measuring the depth of the recess Based on the beginning of the principle . According to the statistics, the Rockwell hardness test is the most widely used hardness test method in the metallurgical industry with a use rate of over 70%. It is widely used in the areas of constant performance, ease of operation, intuitive and comfortable dial loading, metal processing and fabrication, failure analysis of various metallic materials, universities and research institutes and sophisticated metal detector and other materials.
The surface Rockwell hardness test is based on a diamond cone or a diameter of the ball head, with a small test force to press the sample surface hardness value. In the test, the initial test force is first loaded and the main test force is loaded. After pressing the specimen test surface, the main test force is removed, and the surface Rockwell hardness value of the measured metal material can be determined,according to the depth of the specimen indentation while retaining the initial test force.
As is shown in the figure below, 0-0 is the position where the diamond indenter is not yet in contact with the specimen. 1-1 for the initial test force under the action of the indenter position, press the depth of h1, the initial test is to eliminate the sample surface.It is not clean which is caused by the accuracy of the test results. In the figure, 2-2 is the position of the indenter under the total test force (initial test force and main test force), the pressing depth is h2.3-3,and the position of the indenter after unloading the main test force, for metal elastic deformation will produce a certain recovery, so the actual pressure into the depth of h3 h3.The main test force caused by the plastic deformation of the indenter into the depth of h is h3-h1. Rockwell hardness value determined by the size of h, the greater the depth h, the lower the hardness; the other hand, and the higher the hardness. Each press 0.001mm is a surface Rockwell hardness unit. The hardness value obtained is called the surface Rockwell hardness value, denoted by the symbol HRN (T).
Rockwell hardness tester working principle Figure
|Scale||Indenter||Preliminary testing force(N)||Testing force(N)||Applications|
|HR15N||diamond cone with 120°apex angle top spherical radius with 0.2mm||29.4||147.1||Nitriding steel, various steel sheets, knives and other parts of the edge and the surface treatment part|
|HR15T||φ1.5875mm(1/16 inch steel ball)||147.1||Soft steel, yellow steel, bronze, aluminum and other sheet|
|Standard Configuration||1||Main unit||1|
|2||Diamond Rockwell indenter||1|
1/16in ball indenter
|5||Thermal printing paper||1|
|6||Small testing table||1||Diameter 40mm|
|7||Large testing table||1||Diameter 150mm|
|8||V-shape testing table||1||Diameter 40mm,test cylindrical specimens|
Rockwell Standard Block
Surface Rockwell Standard Block
Surface Rockwell Standard Block
|12||Plastic dust cover||1|
|14||ABS instrument case||1|