kekerasan:

Stainless steel tubes are commonly used to measure the hardness of Brinell, Rockwell and Vickers. Brinell hardness Among the paip keluli tahan karat 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 kekerasan:

Tahan karat tiub keluli Rockwell ujian kekerasan adalah sama seperti ujian kekerasan Brinell. Perbezaannya ialah ia mengukur kedalaman lekukan. The Rockwell ujian kekerasan adalah kaedah yang digunakan secara meluas di mana HRC digunakan kedua hanya untuk Brinell kekerasan HB dalam standard paip keluli. Rockwell kekerasan boleh digunakan untuk penentuan bahan-bahan logam daripada sangat lembut untuk keras. Ia mengkompensasi kaedah Brinell itu. Ia adalah lebih mudah daripada kaedah Brinell dan boleh terus membaca nilai kekerasan dari tombol mesin kekerasan. Walau bagaimanapun, disebabkan lekukan kecil, nilai kekerasan tidak begitu tepat sebagai kaedah Brinell itu.

kekerasan Vickers

Tahan karat tiub keluli Vickers ujian kekerasan adalah juga satu kaedah ujian lekukan untuk mengukur bahan-bahan logam yang sangat nipis dan kekerasan lapisan permukaan. Ia mempunyai kelebihan utama kaedah Brinell dan Rockwell, dan mengatasi kelemahan asas mereka, tetapi ia tidak semudah kaedah Rockwell. Kaedah Vickers jarang digunakan dalam standard paip keluli.

ujian 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 paip keluli tahan karats. 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

Properties mekanikal

Saiz paip keluli tahan karat

Anil & jeruk, penyepuhlindapan terang, digilap

Proses