车间对热处理工件进行检验使用的试样,有些是专供检验用的随炉试样,有些是直接从工件上切取。这样的试样必须在规定部位切取。切取淬火工件的试样通常使用砂轮片切割,应不断放水冷却,以免因切割热而使工件回火。在砂轮上磨光试样时同样应及时冷却,以免因摩擦热而产生相变。用粗砂纸进行第一道磨光时 Some of the specimens used in the workshop for the test of heat-treated workpieces are for furnace test specimens, some of which are cut directly from the work piece. Such samples must be cut at the specified location. Quenching the workpiece samples are usually cut using a grinding wheel, should continue to drain water cooling, so as to avoid heat caused by the workpiece tempering. Grinding the sample wheel in the same time should be promptly cooled, so as to avoid friction heat generated phase change. When gritting the first pass with grit paper