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Rockwell superficial hardness testi

Rockwell superficial hardness testing method
The Rockwell superficial hardness tester is shown at a in fig. 5-37. The method of testing with this mechine is identical to that of the basic Rockwell hardness tester. The difference is that rockwell superficial tester tests the hardness closer to the outside surface of the metal than the rockwell tester does.
Views B and C show hardness testing machines that can be altered to test either rockwell hardness or Rockwell superficial hardness.
Process description
In order to test the hardness closer to the surface, a smaller minor load and smaller major load are used. The three common loads used on the superficial tester are 15 kg, 30 kg, and 45 kg. The same diamond point penetrator and 1/16 in. Ball used in the Rockwell test are also used on the Rockwell superficial tester.
Details of machine
Since there are two choices of penetrators and three choices of kg loadings, there are six total combinations available for used on the superficial tester. Thus, the superficial tester employs six common scales. Show the relationship of these scales to their penetrators and kg loadings.
For example, 55 - 15 N would mean that the material has a hardness value of 55 units. The sample was measured on a Rockwell superficial test machine where 15 kg and a diamond point penetrator were used to run the test. A reading of 75 - 30T would mean that the material hardness is 75 units and the 1/16 in. Ball and 30 kg load were used.
The penetrator-load combination on a Rockwell superficial tester for the hardest steels would be the one employed for the 45N scale. This combination makes use of the diamond point penetrator and the 45 kg load.
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Rockwell superficial hardness testing methodThe Rockwell superficial hardness tester is shown at a in fig. 5-37. The method of testing with this mechine is identical to that of the basic Rockwell hardness tester. The difference is that rockwell superficial tester tests the hardness closer to the outside surface of the metal than the rockwell tester does.Views B and C show hardness testing machines that can be altered to test either rockwell hardness or Rockwell superficial hardness.Process descriptionIn order to test the hardness closer to the surface, a smaller minor load and smaller major load are used. The three common loads used on the superficial tester are 15 kg, 30 kg, and 45 kg. The same diamond point penetrator and 1/16 in. Ball used in the Rockwell test are also used on the Rockwell superficial tester.Details of machineSince there are two choices of penetrators and three choices of kg loadings, there are six total combinations available for used on the superficial tester. Thus, the superficial tester employs six common scales. Show the relationship of these scales to their penetrators and kg loadings.For example, 55 - 15 N would mean that the material has a hardness value of 55 units. The sample was measured on a Rockwell superficial test machine where 15 kg and a diamond point penetrator were used to run the test. A reading of 75 - 30T would mean that the material hardness is 75 units and the 1/16 in. Ball and 30 kg load were used.The penetrator-load combination on a Rockwell superficial tester for the hardest steels would be the one employed for the 45N scale. This combination makes use of the diamond point penetrator and the 45 kg load.
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Rockwell metode pengujian kekerasan dangkal
The Rockwell kekerasan dangkal tester ditampilkan di dalam ara. 5-37. Metode pengujian dengan mechine ini identik dengan dasar Rockwell hardness tester. Perbedaannya adalah bahwa rockwell tester dangkal menguji kekerasan lebih dekat ke permukaan luar dari logam dari rockwell tester tidak.
Dilihat B dan C menunjukkan kekerasan pengujian mesin yang dapat diubah untuk menguji baik rockwell kekerasan atau kekerasan Rockwell dangkal.
Deskripsi Proses
Dalam rangka untuk menguji kekerasan lebih dekat ke permukaan, beban ringan lebih kecil dan beban utama yang lebih kecil digunakan. Tiga beban yang umum digunakan pada tester dangkal 15 kg, 30 kg, dan 45 kg. Sama titik berlian penetrator dan 1/16 di Ball. Digunakan dalam uji Rockwell juga digunakan pada Rockwell tester dangkal.
Detail mesin
Karena ada dua pilihan penembus dan tiga pilihan beban kg, total ada enam kombinasi yang tersedia untuk digunakan pada tester dangkal. Dengan demikian, tester dangkal mempekerjakan enam skala umum. Menunjukkan hubungan dari skala ini untuk mereka penembus dan kg beban.
Misalnya, 55-15 N berarti bahwa materi memiliki nilai kekerasan 55 unit. Sampel diukur pada Rockwell mesin uji dangkal di mana 15 kg dan titik penetrator berlian yang digunakan untuk menjalankan tes. Sebuah pembacaan 75 -.. 30T akan berarti bahwa kekerasan material adalah 75 unit dan 1/16 di Ball dan 30 kg beban yang digunakan
Kombinasi penetrator-beban pada tester dangkal Rockwell untuk baja yang paling sulit akan menjadi satu digunakan untuk skala 45N. Kombinasi ini membuat penggunaan titik berlian penetrator dan beban 45 kg.
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