HRM-45型手动表面洛氏硬度计是一种普及型的，专门用于测试金属材料表面硬度的洛氏硬度计。本机采用机械式手动加载操作，无电器装置。具有操作简便，压痕微小，精度高等特点。
适用范围
表面淬火钢，铜、铝合金薄板，带钢,硬质合金钢，镀锌，镀铬，镀锡，材料表面热处理和化学表面处理的各种金属材料。
HR-45M Manual Superficial Rockwell Hardness Tester adopts mechanicalmanual testing method, without electrical device. With simple appearance, it uses as popular type Rockwell Hardness testing instrument.
Usage Range:
Surface hardened steel, copper, aluminum alloy sheet, hard alloy steel, zinc layers, chrome layers, tin layers, surface heat treatingchemical treating materials, etc.
技术数据（Technical Specifications）
| 洛氏标尺(Rockwell Scales) | HR15N, HR30N, HR45N, HR15T, HR30T, HR45T |
| 初试验力（Initial Testing Force） | 3Kg (29.42N) |
| 试验力（All Testing Force） | 15Kg (147.1N), 30Kg (294.2N), 45Kg (441.3N) |
| 硬度读取 (Indication of Hardness Value) | 表盘式（Dial ） |
| 试件zui大高度 Max. Height of Specimen | 170mm |
| 仪器尺寸(Overall Dimension) | 520X240X700MM (长X宽X高, LXH) |
| 仪器重量(Net Weight) | 80 Kg |
| 执行标准 (Carried Standard) | GB/T230.2 国家标准、JJG112检定规程 GB/T230.2 Chinese StandardJJG112 Inspection Rule |
| 标准配件、附件 (Standard Accessories) | 金刚石洛氏压头，直径1.5875mm硬质合金球压头，大平试台、中平试台、V型试台，硬度块 Diamond Rockwell Indenter, Diameter 1.5875mm Hard Alloy Steel Ball Indenter, Large Testing Table , Medium Testing TableV-shaped Testing Table, HRCHRB Hardness Blocks |
