四、金属硬度及强度换算
分类：冷作钣金工操作13156字
黑色金属硬度及强度换算见表2—11。低碳钢硬度及强度换算见表2—12。
表2—11 黑色金属硬度及强度换算
硬 度洛氏表面洛氏维氏布氏HRCHRAHR15NHR30NHR45NHVHB30D2d10、2d5、
4d2.5(mm)70.0
69.5
69.0
68.5
68.0
67.5
67.0
66.5
66.0
65.586.6
86.3
86.1
85.8
85.5
85.2
85.0
84.7
84.4
84.1 1037
1017
997
978
959
941
923
906
889
872 65.0
64.5
64.0
63.5
63.0
62.5
62.0
61.5
61.0
60.5
60.0
59.5
59.0
58.5
58.0
57.5
57.0
56.5
56.0
55.5
55.0
54.5
54.0
53.5
53.0
52.583.9
83.6
83.3
83.1
82.8
82.5
82.2
82.0
81.7
81.4
81.2
80.9
80.6
80.3
80.1
79.8
79.5
79.3
79.0
78.7
78.5
78.2
77.9
77.7
77.4
77.192.2
92.1
91.9
91.8
91.7
91.5
91.4
91.2
91.0
90.8
90.6
90.4
90.2
90.0
89.8
89.6
89.4
89.1
88.9
88.6
88.4
88.1
87.9
87.6
87.4
87.181.3
81.0
80.6
80.2
79.8
79.4
79.0
78.6
78.1
77.7
77.3
76.9
76.5
76.1
75.6
75.2
74.8
74.4
73.9
73.5
73.1
72.6
72.2
71.8
71.3
70.971.7
71.2
70.6
70.1
69.5
69.0
68.4
67.9
6 ...... （共13156字） [阅读本文]>>
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