Thread Content
The Rockwell hardness tester is a type of metrological testing instrument that plays an important role in ensuring product quality and conducting failure analysis; therefore, choosing the right Rockwell hardness tester is a crucial issue for users. 1. Should I choose an imported or domestic Rockwell hardness tester? The Swiss company PROCEQ invented the Rockwell hardness tester in 1977. The Rockwell hardness testers produced by this company are of world-class quality, and many countries around the world adopt its technical standards as their own measurement standards. China’s measurement standards are also formulated with reference to PROCEQ’s technical standards. The main feature of the Rockwell hardness testers produced by the Swiss company PROCEQ is that one main unit can be equipped with seven different types of impact devices. Imported Rockwell hardness testers have impeccable performance, but they are relatively expensive. A imported Rockwell hardness tester with the standard D-type configuration costs around 70,000 yuan, and it is not convenient to repair them when problems arise. The advantage of domestic Rockwell hardness testers is their low cost; a domestically produced Rockwell hardness tester with a standard D-type configuration costs around 10,000 yuan. However, domestic Rockwell hardness testers vary in quality, so careful selection is necessary when purchasing them. 2. How to distinguish between high-quality and low-quality Rockwell hardness testers? True Richter hardness testers comply with **standards and international standards, and exhibit interchangeability and consistency. Although the relevant Chinese authorities have established standards for Rockwell hardness testers, some manufacturers lack the technical capability to produce such testers that meet these standards; as a result, they use correction methods to manufacture their devices. Although these products are also labeled as Rockwell hardness testers, they are quite different from genuine ones. Hardness testers with originally inaccurate readings can achieve accurate results after being corrected. Therefore, when choosing a Rockwell hardness tester, it is important to pay attention to the following characteristics of a genuine device: ① The impact mechanism must be interchangeable. One main unit of a Rockwell hardness tester can be equipped with seven different types of impact devices simultaneously ； Several impact devices of the same type can be configured on one host. ②The punch of the impact device is replaceable. The punch of the impact device in the Rockwell hardness tester is replaceable. The punches of impact devices of the same type can be replaced with each other without affecting the measurement values. ③The Rockwell hardness tester does not have adjustability. A Leeb hardness tester does not have any adjustment capabilities after leaving the factory; when inaccurate readings occur due to wear of the ball head, this issue should be resolved by replacing the ball head. ④The measurement error of the Rockwell hardness tester meets the standard requirements across the entire range of hardnesses. The measurement error of the Rockwell hardness tester meets the specified error requirements across the entire range of hardnesses, from low to high.