A wear-resistant and corrosion-resistant non-magnetic alloy material and its preparation method

An alloy material, non-magnetic technology, applied in the field of alloy materials, can solve the problems of poor fatigue resistance, easy deformation, poor wear resistance, etc., to achieve the effect of improving corrosion resistance, reducing corrosion potential difference, and reducing driving force

Active Publication Date: 2021-06-15
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 2) Cr30A: low material fluidity, poor casting performance
[0007] 3) ZG40Cr25Ni20Si2: low high temperature strength, low as-cast hardness (about 25HRC), poor fatigue resistance, easy deformation, poor wear resistance
[0011] The above-mentioned patents are poor in a single factor such as corrosion resistance and wear resistance, which leads to the failure of the erosion resistance of the material to meet the requirements, so it cannot meet the requirements in extreme environments.

Method used

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  • A wear-resistant and corrosion-resistant non-magnetic alloy material and its preparation method
  • A wear-resistant and corrosion-resistant non-magnetic alloy material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] This embodiment provides a wear-resistant and corrosion-resistant non-magnetic alloy material, which is smelted from the following components by weight: 1.1% carbon, 0.2% silicon, 0.7% manganese, 30% chromium, and 12% nickel %, 1.2% copper, 3.4% molybdenum, 0.2% tungsten, 0.019% phosphorus, 0.023% sulfur, 0.08% titanium, 0.27% vanadium, 0.09% niobium, 0.1% cerium and the rest is iron.

[0049] The preparation process is:

[0050] (1) Smelting: Add carbon steel, recycled material, ferrochromium, ferromolybdenum, electrolytic copper, electrolytic nickel, ferrosilicon, pure titanium, rare earth cerium, pure vanadium, pure niobium, etc. to the intermediate frequency according to the material composition ratio. In the induction furnace, the temperature of the molten iron is controlled at 1650°C. After the material is completely melted, some ferromanganese is added for pre-deoxidation treatment.

[0051] (2) Out of the furnace: when the temperature of the molten iron is cont...

Embodiment 2

[0061] This embodiment provides a wear-resistant and corrosion-resistant non-magnetic alloy material, which is smelted from the following components by weight: 1.3% carbon, 0.5% silicon, 0.9% manganese, 29% chromium, and 10% nickel %, copper 2%, molybdenum 3.7%, tungsten 0.5%, phosphorus 0.016%, sulfur 0.022%, titanium 0.1%, vanadium 0.28%, niobium 0.09%, cerium 0.07%, and the rest is iron. After testing, the performance index of the alloy material produced by the present invention is as follows:

[0062] The preparation process is the same as in Example 1:

[0063] 1), hardness index: 40 ~ 45HRC

[0064] 2), corrosion resistance:

[0065] 160g / L sulfuric acid + 8g / L hydrochloric acid + 13g / L hydrofluoric acid, 25°C: the corrosion rate is 0.271mm / y;

[0066] 160g / L sulfuric acid + 8g / L hydrochloric acid + 13g / L hydrofluoric acid, 85°C: the corrosion rate is 1.219mm / y;

[0067] 160g / L sulfuric acid + 8g / L hydrochloric acid + 13g / L hydrofluoric acid + 40~70# quartz sand, 25°...

Embodiment 3

[0069] This embodiment provides a wear-resistant and corrosion-resistant non-magnetic alloy material, which is smelted from the following components by weight: 1.5% carbon, 1.4% silicon, 0.4% manganese, 31% chromium, and 9% nickel %, 1.0% copper, 3.7% molybdenum, 0.9% tungsten, 0.016% phosphorus, 0.025% sulfur, 0.03% titanium, 0.2% vanadium, 0.04% niobium, 0.05% cerium and the rest is iron.

[0070] The preparation process is the same as in Example 1:

[0071] 1), hardness index: 42~47HRC

[0072] 2), corrosion resistance:

[0073] 160g / L sulfuric acid + 8g / L hydrochloric acid + 13g / L hydrofluoric acid, 25°C: the corrosion rate is 0.378mm / y;

[0074] 160g / L sulfuric acid + 8g / L hydrochloric acid + 13g / L hydrofluoric acid, 85°C: the corrosion rate is 2.274mm / y;

[0075] 160g / L sulfuric acid + 8g / L hydrochloric acid + 13g / L hydrofluoric acid + 40~70# quartz sand, 25°C, the slurry washing speed is 2m / s: the corrosion rate is 3.483.mm / y;

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Abstract

The invention provides a wear-resistant, corrosion-resistant and non-magnetic alloy material, whose chemical element composition and mass fraction are: carbon 1.1-1.5%, silicon 0.2-1.4%, manganese 0.4-1.2%, chromium 26-32%, nickel 26-32% 6.0-15.0%, copper 0.7-2.0%, molybdenum 2.5-5.0%, tungsten 0.1-0.9%, phosphorus 0-0.1%, sulfur 0-0.1%, titanium 0.01-0.1%, vanadium 0.1-0.3%, niobium 0.01- 0.1%, cerium 0.01~0.1%, the rest is iron. This material is not only non-magnetic, but also has high wear resistance, high temperature resistance, erosion resistance, and excellent corrosion resistance in the environment of sulfuric acid, hydrochloric acid and hydrofluoric acid. The invention has reasonable raw material formula and simple process, and can be widely used in chemical industry, flue gas desulfurization device, metallurgy and other industries with strong acidity, alkalinity and serious solid scouring.

Description

technical field [0001] The invention belongs to the field of alloy materials, in particular to a wear-resistant and corrosion-resistant non-magnetic alloy material and a preparation method thereof. Background technique [0002] At present, the slurry pump materials used in mining, metallurgy, petroleum, chemical industry, marine exploration and other fields are facing the phenomenon of severe corrosion and wear, which leads to a shortened service life. The sulfuric acid, phosphoric acid, hydrochloric acid, hydrofluoric acid and other corrosive media produced in the phosphoric acid, sulfuric acid industry and flue gas desulfurization devices in thermal power generation and the harsh two-phase fluid transportation industry have a strong corrosive effect on the slurry pump. At the same time, there are usually a large number of solid particles in these service environments. During the service process of the material, while being corroded by the corrosive medium, the material is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/42C22C38/44C22C38/50C22C38/46C22C38/48C22C33/06C21C7/06C21C7/064C21D1/26
CPCC21C7/06C21C7/064C21C7/0645C21D1/26C21D2211/001C22C33/06C22C38/005C22C38/02C22C38/04C22C38/42C22C38/44C22C38/46C22C38/48C22C38/50
Inventor 许晓嫦宁兆祥谭騛宁晋奎
Owner CENT SOUTH UNIV
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