Overview:

Integrated casting body, without deformation or displacement, with a weight loading structure, stable performance, high measurement accuracy, and good repeatability. The display interface adopts a menu style structure. Electric loading, automatic load holding and unloading, automatic reading, easy operation, small indentation, and high accuracy. Main functions: selection of surface Rockwell hardness scale, multiple hardness conversion functions, printing and outputting hardness test results, with good operability.

Main functions:

A surface Rockwell hardness tester for testing the surface hardness of metal materials with electric loading, automatic load holding and unloading, and automatic reading;

The characteristics of easy operation, small indentation, and high accuracy;

● Selection of surface Rockwell hardness scale;

● Hardness conversion between different hardness levels;

● Print and output hardness test results;

Has good reliability and operability.

Application scope:

Surface quenched steel, copper, aluminum alloy thin sheets, strip steel, hard alloy steel, galvanized, chrome plated, tin plated, various metal materials with surface heat treatment and chemical surface treatment.

        
Technical data: 

Roche test principle:
At the beginning of the experiment, the pressure head of the testing machine is placed on the specimen, an initial test force is applied, and a reference point measured by the displacement measurement device is established. Because the initial test force causes the indenter to press into the specimen, the smoothness or irregularity of the surface will not affect the test. Next, the testing machine applies the main test force, which is larger and enters the specimen deeper. Then, the main test force is removed while maintaining the initial test force. At this time, the testing machine measures the depth of the indentation relative to the established reference point. The straight-line depth of dents is the basis of Rockwell hardness values. A shallow indentation depth only indicates a higher material hardness, while a relatively deep indentation depth indicates a softer material hardness.

HRC A=100-n1-n0 0.002

HRB=130-n1-n0 0.002

In the formula: n0- the depth at which the indenter is pressed into the specimen under the initial test force F0

N1- The depth at which the indenter is pressed into the specimen while applying the total test force F and removing the main test force F1, while still maintaining the initial test force F0.

Appearance of hardness tester host:

The hardness tester meets the standard:

GB/T 230.1-2018 Rockwell hardness test for metallic materials Part 1 Test method

GB/T 230.2-2012 "Rockwell hardness test for metallic materials - Part 2: Verification and calibration of hardness testers" National standard

JJG 112-2013_ Verification Regulations for Metal Rockwell Hardness Testers (A, B, C, D, E, F, G, H, K, N,/T Scales)

ASTM E18-2015 Standard Test Method for Rockwell Hardness of Metallic Materials

ASTM Standard - Metal Test Methods and Analysis Procedures

Standard configuration