Indefinite chilled double-poured cast iron (ICDP) roller containing V and production technique thereof
A production process and roll technology, applied in the field of V-shaped ICDP roll and its production process, can solve the problems of low wear resistance production efficiency, etc., and achieve the effect of refining the structure of the casting, excellent use effect, and improved anti-accident ability.
Active Publication Date: 2015-12-09
TANGSHAN IRON & STEEL GROUP
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Problems solved by technology
The low wear resistance of the traditional nickel-chromium-molybdenum rolls used on the finishing stand has become a bottleneck restricting the production efficiency of the entire rolling line
Method used
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Embodiment
[0044] Embodiment: The concrete process of the production technology of this plus V type ICDP roll is as follows.
[0045] (1) Produce 9 pieces of Φ700×1880 plus V-shaped ICDP rolls for the hot plate line of a steel factory. The 3T and 10T medium frequency induction furnaces are respectively used to smelt the working layer of the V-shaped ICDP roll and the molten iron at the core of the roll.
[0046] The chemical composition of the working layer of the 9 plus V-shaped ICDP rolls produced according to this process is shown in Table 1.
[0047] Table 1: Chemical composition of the working layer of the rolls in each embodiment (wt%)
[0048]
[0049] In Table 1, the balance is iron and unavoidable impurity elements.
[0050] The chemical composition of the working layer of the 9 plus V-shaped ICDP rolls produced according to this process is shown in Table 2.
[0051] Table 2: Chemical composition of the roll core of each embodiment (wt%)
[0052]
[0053] In Table 2, t...
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The invention discloses an indefinite-chilled double-poured cast iron (ICDP) roller containing V and a production technique thereof. A working layer of the ICDP roller is made of high-nickel-chromium indefinite-chilled cast iron containing V, and a core of the ICDP roller is made of excessively high-strength alloy nodular cast iron. The working layer of the ICDP roller is prepared from, by mass, 3.0%-3.4% of C, 0.6%-1.2% of Si, 0.4%-1.0% of Mn, 0%-0.08% of P, 0%-0.03% of S, 4.0%-4.5% of Ni, 1.6%-2.0% of Cr, 0.2%-0.6% of Mo, 0.7%-0.8% of V and the balance iron and inevitable impurity elements. The ICDP roller containing V is different from an existing improved ICDP roller strengthened through V and Nb together in that only the V element is added for strengthening; through micro hardness detection, it can be detected that the hardness of VC and VN is higher than that of the mixed carbide of NbC and NbN and is also higher than that of the mixed carbide of Nb and V, namely the ICDP roller containing the V has higher abrasion resistance and hardness compared with the existing ICDP roller containing V and Nb, and it is guaranteed that a finish rolling front rack is matched with a finish rolling rear rack. Through practical use of steel rolling enterprises, it is proved that the ICDP roller is excellent in use effect, and the abrasion resistance and the accident preventing capacity of the roller are remarkably improved compared with ordinary rollers.
Description
technical field [0001] The invention relates to a compound roll, especially a V-shaped ICDP roll and its production process. Background technique [0002] In the past few decades, with the continuous development of steel rolling technology and the continuous improvement of product quality requirements, the performance requirements of rolling mill rolls have also been continuously improved. Roll performance is mainly reflected in high wear resistance, longer rolling life and higher safety. High-speed steel (HSS) rolls are gradually replacing the high-chromium composite cast iron rolls of the hot continuous rolling finish rolling front frame with their high wear resistance, surface roughness resistance, and good performance in terms of strength and toughness. The surface quality is better than that rolled by high chromium cast iron rolls. The good surface quality of high-speed steel rolls is enough to extend the service life of the rolls. After finishing rolling, there is no...
Claims
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IPC IPC(8): B21B27/02C22C38/56
Inventor 黄明李元春肖连华张杰刘宇刘宝存刘双喜李红宇高玉章盛强赵海军曹瑞荣
Owner TANGSHAN IRON & STEEL GROUP