維氏硬度測量方法

1、M1-11.0Definition（定羲）用夾角U懸136o的金剛石四方角金隹入副S，如圄1-1所示，以罩位屋痕面稹所受載荷表示材料的硬度.即HV=0.102FMFsin巴，式中F-戴荷（N）,S-SI痕表面?。╩m2）,d-SI痕封Sd22角度的平均值（mm）.也可根8寸角度d,查表碓定硬度值2.0Measurementcondition（測量彳件）:測量前必i（符被測量面磨平整、拋亮，不能有副痕，污痕及其他親隹物，如:油，氧化唇和磨屑等.被測量面的厚度必1保卸除載荷彳爰，測量面的反面沒有建形.一般其厚度至少有1.5倍於屋痕封角度.硬度倭必i（放置在非常穩(wěn)固的平臺上，屋力S（及其事由必i（保

2、持垂直.要每天用襟型硬度現(xiàn)校瞬硬度倭是否有系統(tǒng)IS差.量雉氏硬度，一般在23C的琪境溫度下迤行.如材料封溫度敕敏感，受溫度波勤影簪敕大川鷹根fitiK材料的特性碓定合理的璟境溫度3.0Measurementprocedure（測量步片聚）:測量畤，必i（符被測量面放置在典硬度由相垂直的位置，且符被測量零件放穩(wěn)次牢.封於外形很小或形狀不SOW的零件，一定要用很可靠的方式（包括用惠用械架）符他伸號災持牢靠.湖整放置被測量零件支撐平臺高度，直至攏目能非常清楚地看到被測量表面，如表面不光亮，平整卻需重新拋光.移樽目寸型被測量面，在測量面上逐取測副停占畤，須注意各測副停占之iw的距離隹必須大於4倍的測制

3、裸占凹坑封角度測副裸占中心到被測量零件距離隹必i（大於2.5倍測副裸占凹坑封角度.施加屋力畤，必慢操作，逐漸加屋，不能生任何震勤和沖擎.或且碓保因操作而使逋勤部件生的慣性矩封測量結(jié)果崖生的影簪可忽略不言十（操作越慢，影簪越?。?此外，如瓢特別明初就屋力鷹翥可能避用敕大的，屋力保持畤iw一般鷹有1015秒.3.5.1#取封角度畤，要注意其精度iOt到封角度的0.4%或0.2Nm,具H視所用倭器精度情況而定.4.0Correspondenceofhardnessandtestload（雉氏硬度符虢JME力之fW的毓I系）硬度符虢硬度符虢硬度符虢硬度符虢HV0.0019.807mNHV0.0250.

4、2452NHV0.54.903NHV20196.1NHV0.00219.61mNHV0.050.4903NHV19.807NHV301294.2NHV0.00329.42mNHV0.10.9807NHV219.61NHV50490.3NHV0.00549.03mNHV0.21.961Nhv549.03NHV0.0198.07mNHV0.32.942NHV1098.07N5.0Correctioncoefficientonthecurvedsurface（曲面雉氏硬度測量修正系數(shù)）:常被測量面是曲面畤，雉氏硬度測量值需退逾常的系數(shù)相乘迤行修正.根at曲面形狀的不同，修正系數(shù)Cm可分以下6槿情況，

5、其中d是屋痕凹坑封角度的平均值，D是測量檬板直彳至平均值.5.1.被測量面是凸球面畤，修正系數(shù)CmJ1下表：d/DCmd/DCmd/DCmd/DCmd/DCmd/DCm0.0040.9950.0280.9700.0550.9450.0860.9200.1220.8950.1650.8700.0090.9900.0330.9650.0610.9400.0930.9150.1300.8900.1750.8650.0130.9850.03810.9600.0670.9350.1000.9100.1390.88510.1850.8600.0180.9800.0430.9550.0730.9300.10

6、70.9050.1470.8800.1950.8550.0230.9750.0490.9500.0790.9250.1140.9000.1560.8750.2060.8505.2.被測量面是凹球面畤，修正系數(shù)Cm見下表:d/DCmd/DCmd/DCmd/DCmd/DCmd/DCm0.0041.0050.0241.0300.0411.0550.0571.0800.0711.1050.0841.1300.0081.0100.0281.0350.0451.0600.0601.0850.0741.1100.0871.1350.0121.0150.03111.0400.0481.0650.0631.09

7、00.0771.11510.0891.1400.0161.0200.0351.0450.0511.0700.0661.0950.0791.1200.0911.1450.0201.0250.0381.0500.0541.0750.0691.1000.0821.12510.0941.1505.3.被測量面是凸圄柱面畤，修正系數(shù)Cm見下表（封角典圄柱事由成450畤的情況）:d/DCmd/DCmd/DCmd/DCmd/DCmd/DCm0.0090.9950.0440.9750.0810.9550.1190.9350.1590.9150.2000.8950.0170.9900.0530.9700.090

8、0.9500.1290.9300.1690.9100.0260.9850.0620.9650.1000.9450.1390.9250.1790.9050.0350.9800.0710.9600.1090.9400.1490.9200.1890.9005.4.被測量面是凸圄柱面畤，修正系數(shù)Cm見下表（封角典圄柱事由平行畤的情況）:d/DCmd/DCmd/DCmd/DCmd/DCmd/DCm0.0090.9950.0290.9850.0540.9750.0850.9650.1260.9550.1890.9450.0190.9900.0410.9800.0680.9700.1040.9600.153

9、0.9500.2430.9405.5.被測量面是凹BI柱面畤，修正系數(shù)Cm見下表（封角典BI柱串招g成45畤的情況）:d/DCmd/DCmd/DCmd/DCmd/DCmd/DCm0.0091.0050.0501.0300.0891.0550.1271.0800.1621.1050.1961.1300.0171.0100.0581.0350.0971.0600.1341.0850.1691.1100.2031.1350.0251.0150.0661.0400.1041.0650.1411.0900.1761.1150.2091.1400.0341.0200.0741.0450.1121.0700

10、.1481.0950.1831.1200.2161.1450.0421.0250.0821.0500.1191.0750.1551.1000.1891.1250.2221.1505.6.被測量面是凹BI柱面畤，修正系數(shù)Cm見下表（封角典BI柱串招g平行畤的情況）d/DCmd/DCmd/DCmd/DCmd/DCmd/DCm0.0081.0050.0421.0300.0671.0550.0871.0800.1031.1050.1161.1300.0161.0100.0481.0350.0711.0600.0901.0850.1051.1100.1181.1350.0231.0150.0531.0400.