Introduction to common sense of cast iron roll

2022-01-15 17:25

The carbon content of cast iron roll is about 2.5% - 3.5%. According to the primary raw materials, it can be divided into four categories: general cast iron roll, high nickel chromium infinite chilled composite cast iron roll, high chromium composite cast iron roll and alloy nodular cast iron roll. Today, let the roll manufacturer Wuxi Taihu roll editor bring you a brief introduction to the common sense of cast iron rolls.




According to the roll manufacturer, the common arrangement in cast iron roll can be divided into three categories: matrix, cementite and graphite. The matrix is mainly composed of bainite, ferrite, pearlite, bainite and martensite. The shape of graphite in cast iron generally includes flake and spherical.


Cast iron roll

General cast iron roll




The general cast iron roll can be divided into chilled cast iron roll, medium and low alloy infinite chilled cast iron roll and medium and low alloy nodular cast iron roll. Chilled cast iron is a kind of cast iron obtained by using the undercooling of molten iron itself and the external chilling of mold. The external chilling of roll body produces white layer, which has high hardness and good wear resistance. Chilled cast iron rolls can be divided into non ductile iron, nodular graphite composite and spherical core according to the manufacturing process and core raw materials. Infinite chilled cast iron roll is a kind of raw material between chilled cast iron and gray cast iron. There is graphite in the matrix arrangement of roll body working layer, and there is no significant boundary between roll body working layer and core. Rubber roll is this kind of low-end roll. Generally, cast iron rolls are mainly used for stacking thin plate rolling mill, three high Lauter medium plate rolling mill, wire rod rolling mill, bar rolling mill and section steel rolling mill.




High nickel chromium infinite chilled cast composite iron roll




Infinite chilled cast iron is a kind of raw material between chilled cast iron and gray cast iron. There is uniformly distributed graphite in the matrix arrangement of the working layer of the infinite chilled cast iron roll body. The content of graphite increases with the addition of depth from the outside of the roll body, and the hardness decreases




Therefore, there is no significant boundary between the working layer of the roll body and the core. It is also called unbounded chilled cast iron roll. When the raw material of infinite chilled cast iron roll contains high chromium, nickel and molybdenum alloy elements, it is a high nickel chromium infinite chilled cast iron roll, which is produced by full flushing (overflow method) or centrifugal compound pouring process.

Cast iron roll

There are a large amount of carbides in the matrix arrangement of the working layer of the roll body of high nickel chromium infinite chilled cast iron roll, so it has high wear resistance. The existence of graphite in the matrix arrangement makes it have excellent heat resistance. It is widely used as the finishing roll of wide, medium and heavy plate mills and strip mills.




OK, the above is a brief introduction to the general knowledge of the roll manufacturer about the roll cast iron system. If you want to know more about roll products and cast iron rolls, please pay attention to the roll manufacturer Wuxi Taihu roll Xiaobian.