Graphitic Steel Roll
Graphitic steel roll is in semi-finished condition. The carbon content and matrix similar to adamite roll. Some features and usage similar to semi-steel roll.
Introduction
The graphitic steel roll refers to add an appropriate amount of inoculant alloy and nodulizing agent in the molten steel through controlling the content of graphitizing elements and carbide forming elements and the corresponding proportion, to inoculate and nodulate During the solidification process, the rolls form spherical or agglomerated graphite.
The carbon content of graphite steel rolls is equivalent to that of semi-steel roller. The microstructure of the matrix is similar to that of a semi-steel roller. There are still wear-resistant particles with granular and rod-shaped carbides in the matrix structure, and there is a certain amount of spherical graphite in the matrix structure. The presence of spheroidal graphite in a steel matrix significantly improves the coefficient of friction. This ensures a superior bite, preventing slippage during the initial stages of blooming and roughing where heavy reductions are required. According to the purpose of the roll, the carbon content, alloy element content, and hardness requirements of the graphite steel roll can be adjusted, and the content and morphology of carbide and graphite in the structure can be controlled.
Unlike standard alloy steel, the graphite particles in our Graphitic Steel Rolls act as internal lubricants and thermal buffers, effectively arresting the propagation of thermal fatigue cracks (fire-cracking) caused by rapid heating and cooling cycles.
Application
It can be widely used as a work roll of medium plate reversible rolling mill, two-high strip mills machine, medium plate reversible rolling mill, rough rolling mill, blooming mill, steel billet rolling mill, high-speed wire rod roughing mill.
Chemical Composition
| Graphite Steel | C | Si | Mn | P | S | Ni | Cr | Mo |
| ZuS140SiCrNiMo | 1.30~1.50 | 1.30~1.60 | 0.50~0.80 | ≤0.035 | ≤0.030 | 0.20~0.60 | 0.40~0.70 | 0.20~0.50 |
| ZuS150SiCrNiMo | 1.40~1.60 | 1.00~1.40 | 0.60~1.00 | ≤0.035 | ≤0.030 | 0.35~1.00 | 0.60~1.00 | 0.20~0.50 |
| ZuS160SiCrNiMo | 1.50~1.70 | 1.00~1.40 | 0.60~1.00 | ≤0.035 | ≤0.030 | 0.50~1.50 | 0.60~1.60 | 0.20~0.50 |
| ZuS170SiCrNiMo | 1.60~1.80 | 1.00~1.40 | 0.60~1.00 | ≤0.035 | ≤0.030 | 0.80~2.00 | 0.60~2.00 | 0.20~0.50 |
Physical Properties
| Graphite Steel | Roll-body hardness HSD | Tensile strength Mpa |
| ZuS140SiCrNiMo | 36~46 | ≥660 |
| ZuS150SiCrNiMo | 40~50 | ≥600 |
| ZuS160SiCrNiMo | 42~52 | ≥550 |
| ZuS170SiCrNiMo | 45~55 | ≥550 |
Metallographic Structure
The metallurgical structure of roll-body work layer: Pearlite + carbide or fine pearlite + a little bainite + carbide
Customization
Leave your RFQ and provide the drawings, chemical composition, hardness, physical properties, etc.