全苏物理与无线电计量科学研究院于1979～1985年研制成新的布氏硬度专用基准,取代了原有的测量范围只限于450HB 以内的旧基准。新基准的测量范围完全符合国际标准的规定。该基准主机为液压传动的直接加荷式机构,如图1所示。负荷有155.2,612.9,1893,2452,7305,9807,29420N 等七级。主机由 All-Su Institute of Physics and Radio Science and Metrology in 1979-1985 developed a new Brinell hardness-specific benchmark to replace the original measurement range is limited to 450HB within the old benchmark. The measurement range of the new benchmark fully meets the requirements of international standards. The reference host is a hydraulically driven direct-loading mechanism, as shown in Figure 1. Load 155.2,612.9,1893,2452,7305,9807,29420N and other seven. Host by