The Leeb hardness tester as well as its features,typical applications,development and proper type selection were introduced.

Using G type Leeb hardness tester to test the hardness of low strength structural steel sheets, the hardness number is often lower.

Combining with the situation of existing error in hardness measurement by Leeb Hardness Tester,this paper introduces the measuring principle of leeb hardness tester and analyzes the influencing factors of measuring error such as surface roughness of specimen,specimen thickness and the distance between measuring points,and proposes some corresponding preventive measures.

Using the cone anvil made by self, inspect the hardness of small steel ball on WELSON - A653T Rockwell hardness tester ,solve the problem of the small steel ball is slip on the pedestal anvil and "V" shape anvil, difficult to fix,and make the variance analysis to the result compare with traditional method,and to prove the result , of inspect by this way is correct.

The Rockwell hardness tester is a precision measurement instrument in material and part hardness testing, which is often used in detection of materials, product and half-finished product.

The text particular introduced working principle of Rockwell hardness tester, designed load-up program, analyzed raliability,and according related requirements elected electromechanical and the like components.