Giải thích các thuật ngữ HRA, HRC, HV
1, Mũi khoan HRA là thân hình nón kim cương 120+-0,5°, có độ cong trên cùng là 0,2+-0,002mm và tải trọng 60Kg.
2, Mũi khoan HRC là thân hình nón kim cương 120+-0,5°, có độ cong trên cùng là 0,2+-0,002mm và tải trọng 150Kg
3, Bề mặt đường chéo HV của mũi khoan kim cương hình chóp tứ giác 136 °, giá trị độ cứng là áp suất riêng trên diện tích đơn vị vết lõm, tải trọng là lực 50/100 gram, diện tích vết lõm là vài um, giá trị là kg / mm
| HV | HRC | nhân sự | HV | HRC | nhân sự | HV | HRC | nhân sự |
| 1700,0 | 80,5 | 92,5 | 528,0 | 51,0 | 76,0 | 31,0 | 66,0 | |
| 1600,0 | 80,0 | 92,0 | 513.0 | 50,0 | 76,0 | 301.0 | 30,0 | 66,0 |
| 1550,0 | 79,0 | 91,5 | 498,0 | 49,0 | 76,0 | 29,0 | 65,0 | |
| 1500,0 | 78,0 | 91,0 | 48,5 | 75,0 | 28,5 | 65,0 | ||
| 1450,0 | 77,0 | 90,5 | 485,0 | 48,0 | 75,0 | 285,0 | 28,0 | 65,0 |
| 1400,0 | 76,0 | 90,0 | 47,5 | 74,5 | 27,5 | 64,5 | ||
| 1350,0 | 75,0 | 89,5 | 471,0 | 47,0 | 74,0 | 27,0 | 64,0 | |
| 1300,0 | 74,0 | 89,0 | 458,0 | 46,0 | 73,5 | 26,5 | 64,0 | |
| 1250,0 | 73,0 | 88,5 | 45,0 | 73,0 | 271,0 | 26,0 | 64,0 | |
| 1200,0 | 72,0 | 88,0 | 446,0 | 44,5 | 73,0 | 25,5 | 63,5 | |
| 1150.0 | 71,5 | 87,5 | 435,0 | 44,0 | 73,0 | 25,0 | 63,0 | |
| 1140.0 | 71,0 | 87,0 | 43,5 | 72,5 | 24,5 | 63,0 | ||
| 1076.0 | 70,0 | 86,5 | 43,0 | 72,0 | 257,0 | 24.0 | 62,5 | |
| 1004.0 | 69,0 | 86,0 | 413.0 | 42,0 | 72,0 | 23,5 | 62,0 | |
| 942,0 | 68,0 | 85,8 | 41,5 | 71,5 | 23,0 | 62,0 | ||
| 894.0 | 67,0 | 85,0 | 41,0 | 71,0 | 22,5 | 62,0 | ||
| 854.0 | 66,0 | 84,5 | 40,5 | 70,5 | 22.0 | 62,0 | ||
| 820.0 | 65,0 | 84,0 | 393,0 | 40,0 | 70,5 | 21,5 | 61,5 | |
| 789.0 | 64,0 | 83,5 | 39,5 | 70,0 | 21.0 | 61,0 | ||
| 763.0 | 63,0 | 83,0 | 39,0 | 70,0 | 20,5 | 61,0 | ||
| 739,0 | 62,0 | 82,5 | 38,5 | 69,5 | 236,0 | 20,0 | 61,0 | |
| 716.0 | 61,0 | 82,0 | 373,0 | 38,0 | 69,0 | 223,0 | 19,5 | 60,5 |
| 695,0 | 60,0 | 81,5 | 37,5 | 69,0 | 217,0 | 19.0 | 60,0 | |
| 675,0 | 59,0 | 81,0 | 37,0 | 69,0 | 18,5 | 60,0 | ||
| 655,0 | 58,0 | 80,5 | 36,5 | 68,5 | 209,0 | 18.0 | 60,0 | |
| 636.0 | 57,0 | 80,0 | 353.0 | 36,0 | 68,0 | 205,0 | 60,0 | |
| 56,5 | 79,5 | 35,5 | 68,0 | 197,0 | 59,0 | |||
| 617,0 | 56,0 | 79,0 | 35,0 | 67,5 | 195,0 | 58,0 | ||
| 598,0 | 55,0 | 78,0 | 334.0 | 34,5 | 67,0 | 191,0 | 57,5 | |
| 580,0 | 54,0 | 78,0 | 34,0 | 67,0 | 186,0 | 56,0 | ||
| 562.0 | 53,0 | 78,0 | 33,5 | 67,0 | ||||
| 545,0 | 52,0 | 77,0 | 317,0 | 32,0 | 67,0 | |||
| 51,5 | 76,5 | 31,5 | 66,0 |
Thời gian đăng: 18-04-2024