How to choose the right Rockwell hardness tester-Huayin,sclerometer,Metallographic cut

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How to choose the right Rockwell hardness tester

Release time:

2023/02/23

Currently on the market there are many companies selling Rockwell hardness tester,so how do we choose the right equipment?Or so many models how to choose?

This problem,for the purchaser is very troublesome,because there are too many models,prices vary,do not know how to choose?

Here is a brief description,so that you can choose the right Rockwell hardness tester.

Rockwell hardness tester,is the hardness test,the most widely used one.

Because of its simple operation,fast test speed,low requirements for the workpiece,low requirements for the operator and other characteristics,by the majority of heat treatment factories,workshops,colleges and universities,research institutes,aerospace applications.

1,Rockwell hardness tester principle

Rockwell hardness tester is the principle of depth method;

Let's use the simplest words,please refer to the literature for details.

With different force values corresponding to different indenter,hit the indentation,directly read out the hardness value.

2,rockwell hardness tester classification

Classification by scale:

Ordinary Rockwell hardness tester,test HRA,HRB,HRC and so on a total of 15 kinds of scale;.

Surface Rockwell hardness tester,test HR15N,HR30,HR45N,HR15T and so on a total of 15 kinds of scales;

Plastic Rockwell hardness tester,testing HRE,HRL,HRM,HRR and other plastic scales;

Full Rockwell hardness tester,testing all Rockwell(Puro,Table Rockwell,Plastic),a total of 30 Rockwell scales;

Classification by machine:

Bench Rockwell hardness tester;

Portable Rockwell hardness testers.

Classification by display:

Pointer type(dial reading),manual loading,manual unloading,dial reading;

Digital display type(LCD screen or touch screen),automatic loading,automatic unloading,automatic display of hardness value.

Classification by loading mechanism:

Weight loading;

Closed-loop sensor loading.

Classified by country:

Domestic Rockwell hardness tester;

Imported Rockwell hardness tester.

Classification by machine structure:

Screw rising;

Machine head movement.

Classified according to the degree of automation:

Manual Rockwell hardness tester:initial test force manual loading;main test force manual loading,manual unloading;

Operating steps:the pressure head and sample contact,the big pointer turn three times,manually trigger down the loading handle loading,in the hand to push down the handle unloading,look at the pointer reading,resolution 0.5HR;

2.Electric Rockwell hardness tester:initial test force manual loading;the main test force automatic loading,automatic load retention,automatic unloading(need to press the"loading key";saturation time adjustable).

Operation steps:the indenter and sample contact,the big pointer to turn three times,press the"loading key",automatic loading,automatic load protection,automatic unloading,look at the pointer reading,resolution 0.1HR;

3.Digital Rockwell hardness tester:two kinds of

Initial test force manual loading;main test force automatic loading,automatic load protection,automatic unloading;

Operation steps:the indenter and the sample contact,the cursor to"OK",automatic loading,automatic load protection,automatic unloading,automatic display of hardness value,resolution 0.1HR;

Initial test force automatic loading;main test force automatic loading,automatic load preservation,automatic unloading;

Operation steps:the distance between the indenter and the sample is 0.5mm,press the"loading key",the indenter is automatically lowered,automatic loading,automatic load preservation,automatic unloading,the indenter is automatically lifted,automatic display of hardness value,resolution 0.1HR;

4.Automatic digital display Rockwell hardness tester(can refer to:automatic Rockwell hardness tester-a sentence to understand)

Features:automatic lifting screw,automatic selection of test force,automatic loading of the initial test force,automatic loading of the main test force,automatic unloading,automatic display of the hardness tester

Operation steps:

One-key operation:press the start button,the worktable rises automatically,the sample touches the indenter and loads automatically,unloads automatically,and displays the hardness value automatically.

(The working table is automatically raised and lowered(there is no height limitation)without manually turning the screw rotating wheel.)

5.Quick measurement Rockwell hardness tester

Features:4 seconds to display the hardness value;low requirements on the surface of the workpiece,no need to remove the oxidized skin can be measured;with clamping device,without auxiliary support,can automatically clamp the long axis workpiece;

Classification by customization:

Standard machine;customized machine;.

Convex nose Rockwell hardness tester:

Features:unique"convex nose"structure indenter,can test the ordinary hardness tester can not be measured on the surface,such as ring,tube,frame parts inside the surface,the bottom of the table type parts,etc.

Rockwell hardness scale,indenter,test force,material selection

Rockwell hardness tester use

Rockwell hardness error range

Minimum specimen thickness

Through the above simple combing of knowledge points,I hope you can Rockwell hardness tester has a general understanding,and then choose the right equipment for you.

Rockwell hardness tester according to different configurations,different functions,the price will be different.

1,if,you want to choose the cheapest,then you choose:

Pointer type,manually loaded,durable,such as HR-150A;

2,if,you want to choose the cost-effective equipment,then you choose:

Digital display WHR-150;

3、If you want high precision equipment,then you choose:WHR-60D,military quality.

4、If,you automation degree is high,then you choose:

Automatic Rockwell hardness tester

5,if,you a day to measure a lot of workpieces,full inspection,requires fast measurement speed,then you choose:

Fast Rockwell hardness tester

6,if,you want to measure the thinner pieces,then you choose:

Surface Rockwell hardness tester