<strike id="zpth1"></strike>
<span id="zpth1"></span>
<strike id="zpth1"></strike>
<strike id="zpth1"><dl id="zpth1"><del id="zpth1"></del></dl></strike><strike id="zpth1"><dl id="zpth1"></dl></strike>
<span id="zpth1"></span>
<strike id="zpth1"><i id="zpth1"><del id="zpth1"></del></i></strike>
<strike id="zpth1"><i id="zpth1"><del id="zpth1"></del></i></strike>
<strike id="zpth1"></strike>
硬度測量的圓形修正值表

不同硬度制加到測試結果的不同直徑部件的修正值

加到洛氏C,AD的修正值

硬度   凸柱表面直徑     
讀值 1/4 in 3/8 in 1/2 in 5/8 in 3/4 in 7/8 in 1 in 1-1/4 in 1-1/2 in
  6.4 mm 10 mm 13 mm 16 mm 19 mm 22 mm 25 mm 32 mm 38 mm
20 6.0 4.5 3.5 2.5 2.0 1.5 1.5 1.0 1.0
25 5.5 4.0 3.0 2.5 2.0 1.5 1.0 1.0 1.0
30 5.0 3.5 2.5 2.0 1.5 1.0 1.0 1.0 0.5
35 4.0 3.0 2.0 1.5 1.5 1.0 1.0 0.5 0.5
40 3.5 2.5 2.0 1.5 1.0 1.0 1.0 0.5 0.5
45 3.0 2.0 1.5 1.0 1.0 1.0 0.5 0.5 0.5
50 2.5 2.0 1.5 1.0 1.0 0.5 0.5 0.5 0.5
55 2.0 1.5 1.0 1.0 0.5 0.5 0.5 0.5 0
60 1.5 1.0 1.0 0.5 0.5 0.5 0.5 0 0
65 1.5 1.0 1.0 0.5 0.5 0.5 0.5 0 0
70 1.0 1.0 0.5 0.5 0.5 0.5 0.5 0 0
75 1.0 0.5 0.5 0.5 0.5 0.5 0 0 0
80 0.5 0.5 0.5 0.5 0.5 0 0 0 0
85 0.5 0.5 0.5 0 0 0 0 0 0
90 0.5 0 0 0 0 0 0 0 0
加到洛氏B,F及G的洛氏修正值
硬度    凸柱表面直徑     
讀值 1/4 in 3/8 in 1/2 in 5/8 in 3/4 in 7/8 in 1 in    
  6.4 mm 10mm 13mm 16 mm 19 mm 22 mm 25 mm    
                   
0 12.5 8.5 6.5 5.5 4.5 3.5 3.0    
10 12.0 8.0 6.0 5.0 4.0 3.5 3.0    
20 11.0 7.5 5.5 4.5 4.0 3.5 3.0    
30 10.0 6.5 5.0 4.5 3.5 3.0 2.5    
40 9.0 6.0 4.5 4.0 3.0 2.5 2.5    
50 8.0 5.5 4.0 3.5 3.0 2.5 2.0    
60 7.0 5.0 3.5 3.0 2.5 2.0 2.0    
70 6.0 4.0 3.0 2.5 2.0 2.0 1.5    
80 5.0 3.5 2.5 2.0 1.5 1.5 1.5    
90 4.0 3.0 2.0 1.5 1.5 1.5 1.0    
100 3.5 2.5 1.5 1.5 1.0 1.0 0.5    

 

    當測試圓柱型樣本時,測試的準確性將受升降螺絲的對準線,V型樣品臺,壓頭,表面拋光度及圓柱的直線度的嚴重影響。這些修正值是大概的數值并代表的是平均值,最小到0.5。洛氏和表面洛氏值,還需要大量的實踐觀察。 

The above tables are from ASTM E 18
Reprinted from the Annual Book of STM Standards, copyright American Society for Testing and Materials.
100 Harbor Drive, West Conshohocken , PA 19428-2959



日本三级黄三片2020免费