[Reprint China Metallurgical News] Casting high-speed steel rolls: a major achievement in the development of rolls in the world


Time:

2023/06/25

At the end of the 20th century, the rise of casting high-speed steel rolls has become a major event in the history of the world's roll development, because it has crossed the high-chromium cast iron and high-chromium steel rolls we are developing at a very fast speed, and quickly occupied most of the market. For many years, generations of roll manufacturers have tried to make the carbide in the roll tissue into a dispersed and isolated form. The successful development of high-speed steel rolls has made this dream come true, and the traditional Fe3C(M3C) and M7C3 carbides have been changed into MCM2C and M6C carbides with better performance, greatly improving the comprehensive performance of the roll working layer. When we lament the rapid development of international roll manufacturing technology, it has been pulled away by foreign countries. People of insight in the domestic roll industry must fully face up to this reality and concentrate financial, material and human resources to develop the casting high-speed steel rolls needed by modern rolling mills. The picture shows Sun Jianxun (right), general manager of Chaoyang Lianqiang Roll Co., Ltd., inspecting the roll production workshop Since the 1990 s, the world's roll development has achieved remarkable and huge economic benefits. The successful development of cast high-speed steel series rolls. First, the cast high-speed steel roll is used on the front frame of the hot strip rolling mill, and its life is 3 times that of the high chromium cast iron roll. Japan uses high-speed steel rolls in almost all tropical continuous rolling front frames, and European and American countries also use high-speed steel rolls in these mills. With the further improvement of the material and performance of high-speed steel rolls, high-speed steel rolls are being pushed from the finishing front frame of the hot strip rolling mill to the rear frame to replace the high-nickel-chromium infinite chilled composite rolls. The second is the application of casting semi-high-speed steel rolls in tropical roughing mills. The service life is 3 to 4 times higher than that of casting semi-steel rolls, 1.5 to 2.5 times higher than that of high-chromium steel rolls, and the shape and surface quality of rough rolling strip steel are improved. The 1% Cr cast high-speed steel roll produced by CPC method abroad is used on the first and third frames of cold strip rolling mill after quenching and high temperature tempering, and its service life is several times higher than that of 5% Cr forged steel cold rolling work roll.

At the end of the 20th century, the rise of casting high-speed steel rolls has become a major event in the history of the world's roll development, because it has crossed the high-chromium cast iron and high-chromium steel rolls we are developing at a very fast speed, and quickly occupied most of the market. For many years, generations of roll manufacturers have tried to make the carbide in the roll tissue into a dispersed and isolated form. The successful development of high-speed steel rolls has made this dream come true, and the traditional Fe3C(M3C) and M7C3 carbides have been changed into MCM2C and M6C carbides with better performance, greatly improving the comprehensive performance of the roll working layer. When we lament the rapid development of international roll manufacturing technology, it has been pulled away by foreign countries. People of insight in the domestic roll industry must fully face up to this reality and concentrate financial, material and human resources to develop the casting high-speed steel rolls needed by modern rolling mills.

The picture shows Sun Jianxun (right), general manager of Chaoyang Lianqiang Roll Co., Ltd., inspecting the roll production workshop

Since the 1990 s, the world's roll development has achieved remarkable and huge economic benefits. The successful development of cast high-speed steel series rolls.

First, the cast high-speed steel roll is used on the front frame of the hot strip rolling mill, and its life is 3 times that of the high chromium cast iron roll. Japan uses high-speed steel rolls in almost all tropical continuous rolling front frames, and European and American countries also use high-speed steel rolls in these mills. With the further improvement of the material and performance of high-speed steel rolls, high-speed steel rolls are being pushed from the finishing front frame of the hot strip rolling mill to the rear frame to replace the high-nickel-chromium infinite chilled composite rolls.

The second is the application of casting semi-high-speed steel rolls in tropical roughing mills. The service life is 3 to 4 times higher than that of casting semi-steel rolls, 1.5 to 2.5 times higher than that of high-chromium steel rolls, and the shape and surface quality of rough rolling strip steel are improved.

The 1% Cr cast high-speed steel roll produced by CPC method abroad is used on the first and third frames of cold strip rolling mill after quenching and high temperature tempering, and its service life is several times higher than that of 5% Cr forged steel cold rolling work roll.