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洛氏硬度測試

ISO 6508 & ASTM E-18中將洛氏硬度測試定義為世界上使用廣泛的硬度測試方法，適用于幾乎所有的金屬，在某種程度上同樣適用于塑料。洛氏硬度測試是測量由特定壓頭和某個特定試驗力所產(chǎn)生的永恒深度得來。洛氏硬度測試需要更少的式樣表面準(zhǔn)備工作，這使得測試更快速簡便，因此在很多行業(yè)都得到廣泛使用。洛氏硬度測試的主要優(yōu)勢在于其測試速度，打完壓痕后就能立即顯示測量結(jié)果。

洛氏硬度測試的基本方法為：首先施加一個初試驗力，然后再施加一個主試驗力來達(dá)到所需的總的力值，最后回到初試驗力。初試驗力標(biāo)定了零點(diǎn)或參考點(diǎn)。施加主試驗力保持一定預(yù)設(shè)時間是為了使彈性復(fù)原。然后移除主試驗力，而仍然保留初試驗力來得出相對零點(diǎn)或參考點(diǎn)所發(fā)生的變化，以至于得出洛氏硬度值。

軼諾的NEXUS, VERZUS, NEMESIS和Fenix200CL系列的硬度計均由力傳感器閉環(huán)控制（下一篇文章將重點(diǎn)介紹）；它們均由軼諾的研發(fā)中心所研發(fā)，設(shè)計，并完成耐久測試。此外，所有電路板和高科技組件由內(nèi)部生產(chǎn)以確保高等級的行業(yè)生產(chǎn)質(zhì)量控制。

ROCKWELL HARDNESS TESTER

The Rockwell hardness tester uses the method as defined in ISO 6508 & ASTM E18, which is the most commonly used method around the world to determine a material’s hardness and is suitable for almost all metals and to some degree for plastics. Rockwell test measures the permanent depth of indentation produced by a specified force/load on a specified indenter. The Rockwell test requires the least amount of sample prep making it the quicker and easier hardness test to perform across many industries around the globe. The main advantage of Rockwell hardness testing is its speed of testing and its ability to display hardness values directly after penetrating the material.

HOW IS A ROCKWELL HARDNESS TEST DETERMINED?

The Rockwell hardness is determined by the application of a preliminary test force (minor load or preload), followed by an additional load (major load) to reach the total required test load, finally returning to the same preliminary test force (minor load). The first minor load provides the zero or reference position. The major load is applied and held for a predetermined amount of time (dwell time) to allow for elastic recovery. Then the major load is removed, while still maintaining the minor load to establish the change from zero or refence position in determining a Rockwell hardness value.

The NEXUS, VERZUS, NEMESIS and Fenix 200CL series,  dedicated Rockwell hardness testers, are Load Cell Closed Loop machines developed, designed and endurance tested at INNOVATEST R&D facilities. In addition, all electronic boards and high-tech components are manufactured internally allowing the highest level of manufacturing quality control in our industry.