\r| \r\r HB=0.102<\/span>×<\/span><\/p>\r<\/div>\r <\/div>\r<\/td>\r<\/tr>\r<\/tbody>\r<\/table>\r 2F
<\/span><\/span>πD(D-√D2<\/sup>-d2<\/sup>)<\/span>\r式中：F-通過鋼球<\/span>壓頭<\/span>加在試樣上的試驗(yàn)力,N<\/span><\/div>\rD-<\/span>鋼球直徑，mm<\/span><\/div>\rd-<\/span>壓痕直徑，mm<\/span><\/div>\r0.102<\/span>—規(guī)定的系數(shù)。<\/span><\/div>\r <\/div>\r\r
二. 主要技術(shù)參數(shù)
<\/span><\/strong><\/span><\/div>\r1<\/span><\/strong> <\/span>試驗(yàn)力級(jí)數(shù)： 62.5kgf (612.5N) 500kgf(4900N)<\/span><\/span><\/div>\r 100kgf(980N) 750kgf(7350N)<\/span><\/div>\r 125kgf(1225N) 1000kgf(9800N)<\/span><\/div>\r 187.5kgf(1837.5N) 1500kgf(14700N)<\/span><\/div>\r 250kgf(2450N) 3000kgf(29400N)<\/span><\/div>\r2<\/span><\/strong>． 硬度測試范圍： （8～650）HBW<\/span><\/div>\r3.<\/span><\/strong> <\/span>示值精度：<\/span><\/div>\r標(biāo)準(zhǔn)硬度塊 <\/span>示值最大誤差%(相對(duì)H) <\/span>示值重復(fù)性誤差<\/span><\/div>\r≤125 <\/span>±3 0.03d <\/span><\/span><\/div>\r125<HBW<\/span>≤225 <\/span>±2.5 0.025d<\/span><\/span><\/div>\r >225 <\/span>±2 0.02d<\/span><\/span><\/div>\rH<\/span>—標(biāo)準(zhǔn)塊的標(biāo)定硬度值 d<\/span>—壓痕直徑的總平均值<\/span><\/div>\r4.<\/span><\/strong> <\/span>測微目鏡放大倍率： 20<\/span>倍<\/span><\/div>\r5.<\/span><\/strong> <\/span>測微目鏡最小分度值： 0.625um<\/span><\/span><\/div>\r6.<\/span><\/strong> <\/span>試樣最大高度： 185mm<\/span><\/span><\/div>\r7.<\/span><\/strong> <\/span>壓頭中心至機(jī)體最大距離： 135mm<\/span><\/span><\/div>\r8.<\/span><\/strong> <\/span>電源電壓： AC 220V<\/span><\/span><\/div>\r9.<\/span><\/strong> <\/span>外形尺寸： (786<\/span>×565×245)mm<\/span><\/div>\r10.<\/span><\/strong>重量： 130kg
<\/span><\/span><\/div>\r<\/div>\r<\/div>\r<\/p><\/div>
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