kekerasan:

Stainless steel tubes are commonly used to measure the hardness of Brinell, Rockwell and Vickers. Brinell hardness Among the pipa stainless steel standards, Brinell hardness is the most widely used, and the hardness of the material is often expressed by the indentation diameter, which is both intuitive and convenient. However, it is not suitable for steel pipes of harder or thinner steel.

Rockwell hardness:

Tabung stainless steel Rockwell uji kekerasan adalah sama dengan uji kekerasan Brinell. Perbedaannya adalah bahwa hal itu mengukur kedalaman lekukan. The Rockwell uji kekerasan adalah metode banyak digunakan di mana HRC digunakan kedua setelah kekerasan Brinell HB standar pipa baja. Rockwell kekerasan dapat diterapkan untuk penentuan bahan logam dari sangat lembut sampai yang sangat keras. Ini mengkompensasi metode Brinell. Hal ini lebih sederhana dari metode Brinell dan langsung dapat membaca nilai kekerasan dari dial dari mesin kekerasan. Namun, karena lekukan kecil, nilai kekerasan tidak seakurat metode Brinell.

kekerasan Vickers

Tabung stainless steel Vickers uji kekerasan juga merupakan metode uji indentasi untuk mengukur bahan logam yang sangat tipis dan lapisan permukaan kekerasan. Ini memiliki keuntungan utama dari metode Brinell dan Rockwell, dan mengatasi kekurangan dasar mereka, tetapi tidak sesederhana metode Rockwell. Metode Vickers jarang digunakan dalam standar pipa baja.

uji kekerasan

The stainless steel tube has an inner diameter of 6.0mm or more and an annealed stainless steel tube with a wall thickness of 13mm or less. It can be a W-B75 type Vickers hardness tester. It is very fast and simple to test and is suitable for rapid and non-destructive inspection of pipa stainless steels. Stainless steel tubes with an inner diameter of more than 30 mm and a wall thickness greater than 1.2 mm are tested with a Rockwell hardness tester to test HRB and HRC hardness. Stainless steel tubes with an inner diameter of more than 30 mm and a wall thickness of less than 1.2 mm are tested with a surface Rockwell hardness tester to test HRT or HRN hardness. For stainless steel pipes with an inner diameter of less than 0 mm and greater than 4.8 mm, the hardness of HR15T is tested by a special Rockwell hardness tester for pipes. When the inner diameter of the stainless steel tube is larger than 26 mm, the hardness of the inner wall of the tube can also be tested by a Ro

Komposisi kimia

Peralatan mekanis

Ukuran Stainless Steel Pipe

Anil & acar, anil cerah, dipoles

Proses