High temperature Vacuum Hardness tester has a very unique position in many materials performance test, its special test is to be able to directly relate to the international common parameter system (such as mechanics, area, time, electric energy, temperature, etc。)。 In other words, the principle contains a number of ISO standard units, in a necessary condition, need sufficient conditions to establish a hardness relationship。 On the basis of high temperature hardness, the most basic condition is that we need to establish an industrial application level of the relevant open diffusion system, especially in the need for hardness gauges and test specimens and standard blocks to repeatedly test the accuracy of the hardness tester。
Because the hardness test of high-temperature vacuum hardness tester is a destructive test, the single test method can not get the same specimen in different conditions of precision hardness, so need to use different ways to measure the hardness of the material under different conditions, this is our high temperature hardness of the existence of power. In addition to ISO standards, the instrument also involves a number of standards, and in different national standards and industry standards have different requirements, customers need to specify when ordering.
High temperature Vacuum Hardness tester testing is the hardness of materials at a higher temperature, high-temperature vacuum hardness tester in a variety of situations are very necessary, such as tool steel materials, wear-resistant coating, such as seat and application molds, they are used in high temperature。 High temperature hardness can identify the different properties of various materials at high temperature, and has great practicability。 Because the temperature changes in the room are not related to the hardness change, it cannot be used to evaluate the high temperature performance。 However, the hardness of the material, when the temperature changes significantly, such as tempering, wear, corrosion and thermal erosion process, therefore, pressure and high temperature creep fracture performance problems, aging, sliding wear, softening, creep deformation and other problems are to be used to study the high-temperature hardness of materials to solve。 Under normal circumstances, the material under high temperature softening, may lead to wear, this adhesive wear and metal surface between the material damage is a common reason for the failure of parts or equipment in industry, can not seriously study the high-temperature hardness of various materials。
High temperature Vacuum Hardness tester can determine the Rockwell hardness from ambient temperature to high temperature, most suitable for the identification of heat-resistant metal materials, ceramics and other new materials, such as high-temperature hardness, a total of the following key components: High temperature Vacuum Hardness Tester mainframe: Digital double Rockwell hardness tester, configuration dedicated probe, in the high-temperature environment directly test samples of Rockwell and surface Rockwell. The shaft part of the high-temperature furnace is to keep the furnace sealed while the stove is free to rise and fall, and the Rockwell probe can exert the test force from the outside of the furnace. Furthermore, the control of the test force and the test force exerted from outside the furnace depends on the external Rockwell hardness tester mainframe. High-temperature furnace: High-temperature furnace is connected with the shaft can move up and down and observation of the heating device, is with the sample heating device and specimen of the mobile device of the sealing heating room, with sample placement platform, heating wire, insulation furnace and inert gas protection devices. Heating Environment Control System: first of all, the high-temperature furnace heating to the required temperature, and then determine the hardness of the sample, testing process, the sample placed in the High-temperature furnace to maintain high temperature state. Temperature control system can be achieved by arbitrary lifting and temperature maintenance, inert gas protection samples are not oxidized, with high-temperature hardness tester for the special probe from outside the furnace Schgallo hardness pressure, complete the full automatic Rockwell hardness test. Water cooling system: In order to protect the safety of the operator, in the sealed furnace body filled with constant temperature of circulation, to maintain high temperature outside the furnace surface constant temperature.