Research Article
Study on Surface Hardness and Microstructure of Pure Copper Chip Strips Prepared by LSEM
Table 7
Experimental results for surface hardness.
| | No. | D | E | Empty column | F | Surface hardness (HV) |
| | 1 | 1 | 1 | 1 | 1 | 134.5 | | 2 | 1 | 2 | 2 | 2 | 127.0 | | 3 | 1 | 3 | 3 | 3 | 122.2 | | 4 | 2 | 1 | 2 | 3 | 114.2 | | 5 | 2 | 2 | 3 | 1 | 118.2 | | 6 | 2 | 3 | 1 | 2 | 112.2 | | 7 | 3 | 1 | 3 | 2 | 114.6 | | 8 | 3 | 2 | 1 | 3 | 117.6 | | 9 | 3 | 3 | 2 | 1 | 117.3 | | K1 | 383.7 | 363.3 | 364.3 | 370.0 | T = 1077.8 | | K2 | 344.6 | 362.8 | 358.5 | 353.8 | = 129072.5 | | K3 | 349.5 | 351.7 | 355.0 | 354.0 | | | K1 | 127.9 | 121.1 | 121.4 | 123.3 | | | K2 | 114.9 | 120.9 | 119.5 | 117.9 | | | K3 | 116.5 | 117.2 | 118.3 | 118.1 | | | R | 13.0 | 3.9 | 3.1 | 5.4 | | | SS | 302.5 | 28.7 | 14.7 | 57.6 | |
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