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High-wear-resistance corrosion-resistant large-tillage deep-rotary tillage knife material and preparation method thereof

A high wear-resistant, rotary blade technology, applied in metal material coating process, coating, solid-state diffusion coating, etc., can solve the problem that the emergence, growth, and tillage depth of crops in the later season cannot fully meet the requirements and reduce soil fertility and other problems, to achieve excellent soil corrosion resistance, reduce C content, and overcome limitations

Active Publication Date: 2019-06-14
NANJING VOCATIONAL UNIV OF IND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to realize the agronomic requirements of returning full amount of straw to the field without side effects in the double-cropping area of ​​rice and wheat, the plowing depth must exceed 20cm. If the proportion of straw is too high, it will reduce soil fertility and affect the emergence and growth of later crops

Method used

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  • High-wear-resistance corrosion-resistant large-tillage deep-rotary tillage knife material and preparation method thereof
  • High-wear-resistance corrosion-resistant large-tillage deep-rotary tillage knife material and preparation method thereof
  • High-wear-resistance corrosion-resistant large-tillage deep-rotary tillage knife material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] In this embodiment, a material with high wear resistance and corrosion resistance and large tillage depth rotary tiller blade, in terms of mass fraction, mainly includes:

[0041] C 0.35%, Si 0.60%, Mn 1.95%, Cr 3.00%, Ni 0.10%, V 0.26%, Al 0.30%, Nb 0.01%, P 0.030%, S 0.023%, Fe balance.

[0042] The preparation steps are as follows:

[0043] (1) Smelting: In the converter smelting, the mass fraction of C in the molten steel is less than 0.06%, and the mass fraction of P and S is less than 0.02%. Steel tapping. Ferrosilicon, ferromanganese, ferrochrome, ferronickel and ferrovanadium are added during tapping. Alloying of Si, Mn, Cr, Ni and V elements and adding aluminum block for deoxidation; argon blowing during the refining process of LF furnace, white slag retention time 30min, Nb, Al alloying before tapping to control the final molten steel composition After transferring to the degassing station, perform RH vacuum degassing treatment, the vacuum degree is ≤67Pa, to reduce...

Embodiment 2

[0062] In this embodiment, a material with high wear resistance and corrosion resistance and large tillage depth rotary tiller blade, in terms of mass fraction, mainly includes:

[0063] C 0.40%, Si 0.20%, Mn 2.30%, Cr 1.95%, Ni 0.18%, V 0.30%, Al 0.10%, Nb 0.03%, P 0.027%, S 0.022%, Fe balance.

[0064] The preparation steps are as follows:

[0065] (1) Smelting: In the converter smelting, the mass fraction of C in the molten steel is less than 0.06%, and the mass fraction of P and S is less than 0.02%. Steel tapping. Ferrosilicon, ferromanganese, ferrochrome, ferronickel and ferrovanadium are added during tapping. Alloying of Si, Mn, Cr, Ni and V elements and adding aluminum block for deoxidation; argon blowing during the refining process of LF furnace, white slag retention time 30min, Nb, Al alloying before tapping to control the final molten steel composition After transferring to the degassing station, perform RH vacuum degassing treatment, the vacuum degree is ≤67Pa, to reduce...

Embodiment 3

[0082] In this embodiment, a material with high wear resistance and corrosion resistance and large tillage depth rotary tiller blade, in terms of mass fraction, mainly includes:

[0083] C 0.45%, Si 0.30%, Mn 1.50%, Cr 1.50%, Ni 0.30%, V 0.10%, Al 0.22%, Nb 0.05%, P 0.028%, S 0.025%, Fe balance.

[0084] The preparation steps are as follows:

[0085] (1) Smelting: In the converter smelting, the mass fraction of C in the molten steel is less than 0.06%, and the mass fraction of P and S is less than 0.02%. Steel tapping. Ferrosilicon, ferromanganese, ferrochrome, ferronickel and ferrovanadium are added during tapping. Carry out Si, Mn, Cr, Ni and V element alloying, and add aluminum block to deoxidize; LF furnace refining process is full of argon blowing, white slag retention time 20min, Nb, Al alloying before tapping, control the final molten steel composition , After transferring to the degassing station, perform RH vacuum degassing treatment, the vacuum degree is ≤67Pa, to reduce t...

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Abstract

The invention discloses a high-wear-resistance corrosion-resistant large-tillage deep-rotary tillage knife material and a preparation method thereof. The rotary tillage knife material is based on 60Si2Mn and 50 CrVA steel alloy components, and Nb and Al elements are also added. The material comprises, by mass, 0.30-0.45% of C, 0.20-0.60% of Si, 1.50%-2.30% of Mn, 1.50%-3.00% of Cr, 0.10%-0.30% ofNi, 0.10%-0.30% of V, 0.10%-0.30% of Al, 0.01-0.05% of Nb, less than 0.035% of P, less than 0.035% of S and the balance Fe. According to the knife material is hard and tough in surface, and suitable for preparing a long-service-life large-tillage deep-tillage deep-tillage knife; and the alloy composition is optimized, and the rotary tillage knife treated by the composite rare-earth boron-carbon-nitrogen co-permeation surface is excellent in wear resistance.

Description

Technical field [0001] The invention belongs to the technical field of the preparation of agricultural rotary cultivators, and in particular relates to a material with high wear-resistance and corrosion resistance and large tillage and deep rotary cultivators and a preparation method thereof. Background technique [0002] Agricultural machinery equipment is an important support for agricultural development, and it is also an area where "Made in China 2025" clearly focuses on development. Domestically-made agricultural machinery equipment is increasingly demanding in terms of high-end product supply, independent research and development of key components, and product reliability. GB / T5669-2017 (Rotary tillage machine: knife and knife holder) stipulates that the material of the rotary tiller is 65Mn or 60Si2Mn steel. In order to improve the service life in the actual production process, 50CrVA or 51CrV4 steel can also be used as the tool material. In order to ensure the wear resist...

Claims

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Application Information

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IPC IPC(8): C22C38/58C22C38/48C22C38/46C22C38/06C22C38/02C22C33/06C21D8/02C23C8/02C23C8/76
Inventor 施渊吉于林惠
Owner NANJING VOCATIONAL UNIV OF IND TECH
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