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Nickel-molybdenum-vanadium alloy semi-steel roll used for section mill S-shaped rack

A technology of semi-steel rolls and vanadium alloys, which is applied in the field of nickel-molybdenum-vanadium alloy semi-steel rolls for racks, which can solve the problems of wear resistance, hardness drop impact extrusion toughness, heat crack resistance and lack of plasticity, and roll processing efficiency reduction , surface roughness and other problems, to achieve the effect of improving wear resistance, processing efficiency and service life

Pending Publication Date: 2019-09-20
常州市中宇合金轧辊厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many products rolled by rolls, such as section steel, plate, etc.; H-section steel is an important product among them. The plasticity is still lacking, which leads to cracks and rough surfaces of the rolls, which has a great impact on the processing of the product, and will also cause the operators to carry out frequent repairs, which reduces the overall roll processing efficiency.

Method used

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  • Nickel-molybdenum-vanadium alloy semi-steel roll used for section mill S-shaped rack

Examples

Experimental program
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Effect test

Embodiment 1

[0023] A production and processing process of nickel-molybdenum-vanadium alloy semi-steel rolls for the S frame of a section steel rolling mill, including the following steps: S1, selecting the chemical composition of the rolls: C: 1.40%, Si: 0.40%, Mn: 0.80%, P: 0.01 %, S: 0.01%, Cr: 2.0%, Ni: 2.50%, Mo: 0.40%, V: 0.20%, Nb: 0.20%; S2, smelting and burning: smelting in an intermediate frequency induction furnace, during which 50% of quartz sand is used %, lump lime 20%, fluorite powder 5% mixed slagging agent; when the temperature reaches 1530°C, the scum appears white, and the slag is produced; then add 0.03% aluminum for deoxidation, and then tap the steel into the ladle. Argon blowing and oscillating using the refining process outside the furnace; adding 1 kg of yttrium-based heavy rare earth molten steel modifier to remove H and N elements; pouring after sedation for 6 minutes; heat treatment for S3 and roll rough opening: leave 5 mm machining allowance on one side ;The h...

Embodiment 2

[0025] A production and processing process of nickel-molybdenum-vanadium alloy semi-steel rolls for the S frame of a section steel rolling mill, including the following steps: S1, selecting the chemical composition of the rolls: C: 1.60%, Si: 0.60%, Mn: 1.30%, P: 0.02 %, S: 0.02%, Cr: 2.5%, Ni: 2.8%, Mo: 0.60%, V: 0.30%, Nb: 0.30%; S2, smelting and burning: smelting in an intermediate frequency induction furnace, during which quartz sand 65 %, lump lime 27%, fluorite powder 8% mixed slag forming agent; when the temperature reaches 1550°C, the scum will appear white; then add 0.03% aluminum for deoxidation, and then tap the steel into the ladle. Argon blowing and oscillation is carried out by refining process outside the furnace; 2 kg of yttrium-based heavy rare earth molten steel modifier is added to remove H and N elements; pouring after calming down for 7 minutes; heat treatment of S3 and roll rough opening type: leave 5 mm machining allowance on one side ;The heat treatment...

Embodiment 3

[0027]A production and processing process of nickel-molybdenum-vanadium alloy semi-steel rolls for the S frame of a section steel rolling mill, comprising the following steps: S1, selecting the chemical composition of the rolls: C: 1.80%, Si: 0.80%, Mn: 1.60%, P: 0.03 %, S: 0.025%, Cr: 3.0%, Ni: 3.50%, Mo: 0.80%, V: 0.40%, Nb: 0.40%; S2, smelting and burning: smelting in an intermediate frequency induction furnace, during which 80% of quartz sand is used %, lump lime 30%, fluorite powder 10% mixed slag forming agent; when the temperature reaches 1580 ℃, the scum will appear white; then add 0.03% aluminum for deoxidation, and then tap the steel into the ladle. Argon blowing and oscillating using the refining process outside the furnace; adding 3 kg of yttrium-based heavy rare earth molten steel modifier to remove H and N elements; pouring after sedation for 8 minutes; heat treatment of S3 and roll rough opening type: leave 8 mm machining allowance on one side ;The heat treatmen...

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Abstract

The invention relates to the technical field of rolls, in particular to a nickel-molybdenum-vanadium alloy semi-steel roll used for a section mill S-shaped rack. The nickel-molybdenum-vanadium alloy semi-steel roll is provided with an upper roll and a lower roll which are arranged in parallel in the up-down direction, and multiple first ring-shaped opening grooves are formed in the upper roll in the length direction. Multiple second ring-shaped opening grooves are formed in the positions, opposite to the first ring-shaped opening grooves, of the lower roll. The first ring-shaped opening grooves and the second ring-shaped opening grooves are subjected to die combining to form rolled H profile steel. The nickel-molybdenum-vanadium alloy semi-steel roll used for the section mill S-shaped rack is simple in structure and reasonable in machining technology, the wear resistance, the hardness fall, the impact extrusion toughness, the heat crack resisting performance and plasticity of the roll can be obviously improved, and therefore the service life of the overall roll is prolonged, and the roll machining efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of rolls, in particular to a nickel-molybdenum-vanadium alloy semi-steel roll for the S frame of a section steel rolling mill. Background technique [0002] With the continuous development of society, the roll processing industry has developed rapidly. At present, there are many products rolled by rolls, such as section steel, plate, etc.; H-section steel is an important product among them. The plasticity is still lacking, resulting in cracks and rough surfaces of the rolls, which have a great impact on the processing of the product, and will also cause the operators to carry out frequent repairs, reducing the overall roll processing efficiency. Contents of the invention [0003] The technical problem to be solved by the present invention is: in order to solve the problems existing in the above-mentioned background technology, a nickel-molybdenum-vanadium alloy semi-steel roll for the S frame of a section...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/44C22C38/46C22C38/48C22C38/56C21C5/54C21D9/38C21D1/18B21B27/02
CPCC22C38/02C22C38/04C22C38/44C22C38/46C22C38/48C22C38/56C21C5/54C21D9/38C21D1/18B21B27/02C21D2211/008C21D2211/002C21D2211/004
Inventor 许峰许阿平蒋志芳
Owner 常州市中宇合金轧辊厂
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