High wear resistance alloy for slitting roller and manufacturing method thereof

A high wear-resistant, rolling technology, applied in the field of high wear-resistant alloys, can solve the problems of large matrix splitting, loss of matrix protection, and unsatisfactory microhardness

Inactive Publication Date: 2009-07-01
张朝龙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The metallographic structure (quenched state) of high chromium white cast iron is generally M 7 C 3 Type carbide + martensitic matrix, M 7 C 3 The microhardness of type carbide (Hv1200~1800), the volume fraction is about 30%. Compared with some hard abrasives such as quartzite (Hv1000~1300) and corundum (Hv1800), its microhardness is not ideal and is more It is important that M 7

Method used

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  • High wear resistance alloy for slitting roller and manufacturing method thereof
  • High wear resistance alloy for slitting roller and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: According to the composition weight percentage in Table 1, smelting in a vacuum intermediate frequency induction furnace, the process steps are: put pig iron, scrap steel, ferrochrome, ferromolybdenum, ferrotungsten, niobium and other alloys into the smelting furnace for heating and melting , and put the ferro-vanadium into the furnace to heat and melt 20 minutes before the molten steel is released; raise the temperature of the molten iron in the smelting furnace to 1500°C-1600°C, add the ferrosilicon and ferromanganese in batches after the aluminum is fully deoxidized , rare earth and ferro-titanium are added by pouring into the bag; when the temperature rises to 1490-1520°C, aluminum is inserted again for deoxidation and then released; by centrifugal casting, when the centrifugal casting molten steel is formed in the mold barrel, when the temperature drops to 1350°C, the A powerful electromagnetic induction coil is added to the outside of the centrifugal ...

Embodiment 2

[0023] The process steps of embodiment 2 and embodiment 3 are the same as embodiment 1, and their composition weight percentages are shown in table 1.

[0024] The metallographic structure diagram of the alloy that the present invention obtains is shown in figure 1 .

[0025] Table 1 Chemical Composition

[0026]

[0027] The rest is iron and unavoidable impurity elements.

[0028] The wedge-shaped test pieces of the alloys obtained in Example 1, Example 2, and Example 3 were wire-cut and ground into 10×10×55 mm samples. The mechanical properties and wear resistance are shown in Table 2. The wear test was carried out on a ML-10 pin-on-disk wear tester with a load of 1300g and an abrasive of 150 # Al 2 o 3 Water sandpaper, wear time 30min.

[0029] Table 2 Mechanical properties and wear resistance

[0030]

Hardness HRC Impact toughness α

k(J / cm2) Abrasion (mg) Example 1 68.0 9.6 0.75 Example 2 66.0 8.3 1.15 Example 3 62.7 9...

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Abstract

The invention provides a high wear-resistant alloy for a splitting roller, which is characterized in that the alloy comprises the following constituents by weight percentage: 1.9 to 3.8 percent of C, 6 to 25 percent of W, 6 to 18 percent of Mo, 3 to 8 percent of Cr, 6 to 15 percent of Co, 5 to 15 percent of V, 1.5 to 7.5 percent of Nb, 0.5 to 1.5 percent of Si, 0.3 to 1.2 percent of Mn, 2 to 8 percent of Ni, 0.5 to 2.5 percent of B, less than or equal to 0.05 percent of S, less than or equal to 0.07 percent of P, and the balance being Fe. The invention also provides a method for preparing the high wear-resistant alloy for the splitting roller. The method greatly improves impact toughness while improving the wear resistance of materials, and preparation technology is easy to control and grasp.

Description

Technical field [0001] The invention belongs to the field of metal materials, and relates to a high wear-resistant alloy suitable for manufacturing split rolls under high stress and strong abrasive wear conditions and a preparation method of the alloy. Background technique [0002] Wear is one of the main ways of material failure, especially in mining, building materials, electric power, steel mills, rolls and other industries. The service life of rolling steel is short, the amount of steel passing through the rolling groove is small, and the groove of the roll is changed frequently. The whole country consumes about tens of millions of tons of ordinary high-nickel-chromium rolls. Ordinary rolls are not wear-resistant and consume a large amount of metal materials. The use of tungsten carbide is expensive, and the explosive rolls will peel off, which affects the operating efficiency of the main machine. [0003] In order to meet the needs of different working conditions, vari...

Claims

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Application Information

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IPC IPC(8): C22C38/56C22C33/04C21C7/06B22D37/00C21D1/00
Inventor 张朝龙
Owner 张朝龙
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