Onderwerp bekijken
 Nickel hard cast iron
|
|
| zhangxiaosan |
Geplaatst op 24-11-2021 07:29
|
 Guru  Berichten: 9433 Datum van aanmelding: 20.09.16 |
Nickel hard cast iron was developed and applied in the 1930s. After the advent of nickel hard cast iron, alloy white cast iron began to replace non alloy white cast iron, which is an important turning point in the development history of anti abrasive wear materials.Placa de inox chapa de acero inoxidable de 0,5 mm de grosor Nickel hard white cast iron contains nickel and chromium alloy elements, which is internationally known as "Ni hard", and has been incorporated into the national standard in China. The addition of nickel can improve the hardenability, obtain the metal matrix dominated by martensite, accompanied by more retained austenite, and improve the toughness. Chromium is added to prevent the precipitation of graphite and the formation of higher hardness carbides. Nickel hard cast iron was developed and applied in the 1930s. After the advent of nickel hard cast iron, alloy white cast iron began to replace non alloy white cast iron, which is an important turning point in the development history of anti abrasive wear materials.Precio de tuberÃa de acero inoxidable SS 304 Nickel hard white cast iron contains nickel and chromium alloy elements, which is internationally known as "Ni hard", and has been incorporated into the national standard in China. The addition of nickel can improve the hardenability, obtain the metal matrix dominated by martensite, accompanied by more retained austenite, and improve the toughness. Chromium is added to prevent the precipitation of graphite and the formation of higher hardness carbides. Nickel hard cast iron is added with 3.0% ~ 5.0% nickel and 1.5% ~ 3.5% chromium on the basis of ordinary white cast iron to obtain a very hard and wear-resistant martensitic matrix + m3c carbide structure. The infinite solid solution of nickel and iron can effectively improve the hardenability and promote the formation of martensite bainite matrix. At the same time, nickel can stabilize austenite. Too high nickel content will cause a large amount of residual austenite. The addition of chromium can prevent graphitization, promote the formation of carbides, and improve the hardness of m3c carbides, from hv900 ~ 1000 without alloy to hv1100 ~ 1200. The wear resistance of nickel hard cast iron is better than that of ordinary white cast iron. It is widely used in mining, electric power, cement, ceramics, casting and other industries.Placa de chapa de acero inoxidable de 20 mm de espesor 430 |
|
|
|
| Spring naar forum: |
