Ultra-fine grain high-nickel-chromium molybdenum infinitely chilled ductile cast iron and composite roll thereof
A technology of infinite chilled cast iron and ultra-fine grains, applied in the direction of rolling, metal rolling, metal rolling, etc., can solve the problems of insufficient heat crack resistance and other problems, and achieve the benefits of improving surface quality, rolling volume, and reducing The effect of rolling costs
Active Publication Date: 2010-09-01
JIANGSU GONGCHANG ROLL
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Problems solved by technology
This material is mainly graphite in the shape of point balls, and has good wear resistance, but the disadvantage is that the carbide structure is still distributed in a network shape, which can resist thermal cracks, especially for high rolling force and high temperature rolling medium and thick plates It still shows insufficient heat crack resistance on the rolling mill, so there is still room for improvement
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0015] Example 1: Ultra-fine grain high nickel-chromium-molybdenum infinite chilled cast iron, adding 3% by weight (calculated as pure substance) of antimony to the molten iron composed of nickel-chromium-molybdenum infinite chilled cast iron GB / T1504-91.
Embodiment 2
[0016] Embodiment 2: ultrafine-grained high nickel-chromium-molybdenum infinite chilled cast iron, in GB / T1504-91 nickel-chromium-molybdenum infinite chilled cast iron composition iron liquid, add the vanadium of 2% by weight (in terms of pure matter) and 0.5% by weight of Vanadium (as pure substance).
Embodiment 3
[0017] Embodiment 3: Referring to Example 2, the added weight of antimony is 1% (in pure matter), and the added weight of vanadium is 0.8% (in pure matter).
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Ultra-fine grain high Ni-Cr-Mo indefinite chilled cast iron belongs to roll materials used for rolling large vessels. The component comprises the followings based on the weight percentage: 2.9-3.7% of C, 0.6-1.2% of Si, 0.4-1.2% of Mn, 3.01-5.00% of Ni, 1.00-2.00% of Cr, 0.20-0.60% of Mo and Fe being the balance. The component also comprises 1-3% of antimony, which substantially eliminates the network structure of the carbide, causes the structure to be more dispersed, changes the metallographic structure and property of the materials, effectively combines the wear resistance and hot crack resistance of the materials and comprehensively prolongs the service life of the materials.
Description
Technical field [0001] The present invention is aimed at the improvement of the rolling large -scale ships with roll materials, one nickel chromium molybdenum, unlimited cold and hard cast iron, especially involving a super fine for high -rolling requirements, high abrasion resistance and high heat -resistant cracks.The grain high -nickel chromium molybdenum is unlimited and cold and hard cast iron, and it also provides a composite roll made of this material. Background technique [0002] The existing plate with hot-rolled cold rolling materials, nickel chromium molybdenum unlimited cold hard cast iron (IV) (GB / T1504-91), ingredients: C: 2.9-3.7 %, SI: 0.6-1.2 %, mn: 0.4-1.2 %, Ni: 3.01-5.00 %, CR: 1.00-2.00 %, MO: 0.20-0.60 %.This material has a flat strip of graphite and a mesh structure of carbides, so the substrate strength is relatively low and the service life is not long.The crack performance is also poor. During the rolling process of rolling rolling, the rolling volume w...
Claims
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IPC IPC(8): C22C37/10B21B27/00
Inventor 周勤忠邵黎军王纯宏
Owner JIANGSU GONGCHANG ROLL
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