Step Action hardness (Hardness) and storage
of specimens 1. Connect the finished plan to test the hardness (Hardness) according to standard inspection
2. Cutting to size. thickness of 9 mm, a width of 50 mm and a length of 200 mm by using a mechanical saw with water cooling. The accuracy of the workpiece
3. The specimen was cut into the surface hardness testing with wet sandpaper 180-1200. In a standard test, along with the Polishing Powder Alumina powder is mixed with water at a ratio of 1:10 to 3:11 model of the Surface display with sandpaper and water do. Polishing 4. etching the desired hardness Glyceregia acids with a mixture of Glycerol 3 Hydrochloric 2 of the Nitric 1 and take part in the acid bite with 3-5 minutes, then rinse the surface with Methanol, then blow dry. Figure 3.12 shows the biting surface hardness with acid. Glyceregia 5. determine the hardness test the welds and the heat effect Figure 3.13 The placement test, hardness test, hardness 6. The versatile hardness tester (Micro Hardness Test Scale Vickers Testing) by default. from the middle of the weld, then measure out the entire second side of the workpiece to finish in the heat Figure 3.14 shows testing the hardness testing machine. HV 7. Record the test results of the test for hardness. By measuring the hardness of the weld Figure 3.15 The value of the hardness of the specimen.
การแปล กรุณารอสักครู่..
