An amorphous/nanocrystalline matrix high-hardness wear-resistant and corrosion-resistant alloy and its preparation method

A technology of corrosion-resistant alloys and nanocrystals, which is applied in the manufacture of mechanical wear-resistant parts, and the preparation of wear-resistant and corrosion-resistant cast iron alloys and their components. It can solve the problems of low alloy toughness, limited application range, and difficult application, and achieve casting Simple process requirements, good fluidity and low melting point

Active Publication Date: 2017-05-10
广州市信纳德生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Hard phase M in Fe-B alloy 2 B (M represents alloying elements such as Fe, Cr, V, Nb dissolved in borides) is distributed in a continuous network, which completely destroys the continuity of the matrix, resulting in low toughness of the alloy, and it is difficult to apply it to the impact force. Large and severe working conditions, so its application range is limited
Using high temperature heat treatment, rare earth modification, alloying and other means to improve the continuous network distribution of borides to strengthen and toughen Fe-B alloys, expand its application range, and give full play to its wear resistance potential is a very important topic. , but the current research has not made a substantial breakthrough

Method used

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  • An amorphous/nanocrystalline matrix high-hardness wear-resistant and corrosion-resistant alloy and its preparation method
  • An amorphous/nanocrystalline matrix high-hardness wear-resistant and corrosion-resistant alloy and its preparation method
  • An amorphous/nanocrystalline matrix high-hardness wear-resistant and corrosion-resistant alloy and its preparation method

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Experimental program
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Embodiment 1

[0032] Embodiment 1. Select high-carbon ferrochrome, microcarbon ferrochrome, ferroboron, ferro-niobium, ferro-vanadium and industrial pure iron as raw material, and the composition range is as follows: Cr: 10.0wt.%; B: 2.9wt.%; C: 0.7wt.%; Nb: 0.4wt.%; V: 0.2wt.%; See Table 2 for the control of impurity elements. Induction melting and iron mold casting are adopted, the melting temperature is 1500°C, and the casting temperature is about 1400°C. When the temperature of the ingot is about 800°C, the iron mold is opened and air-cooled. The ingot weighs 40kg and the thickness is 30mm.

Embodiment 2

[0033] Embodiment 2. Select high-carbon ferrochromium, metal chromium, ferroboron, ferro-niobium and industrial pure iron as raw materials, and the composition range is as follows: Cr: 10.0wt.%; B: 2.7wt.%; C: 0.7wt.%; Nb: 0.5wt.%; see Table 2 for the control of impurity elements. Induction melting and sand casting are used to cast the master alloy into strips, the melting temperature is 1450°C, and the casting temperature is about 1400°C. Remelt the master alloy cast strips with a resistance furnace, the melting temperature is about 1300°C, and use a die-casting machine to die-cast them into precision parts. The weight of a single part is 300g, and the minimum thickness is 2mm.

Embodiment 3

[0034] Embodiment 3. select high-carbon ferrochrome, microcarbon ferrochrome, ferroboron, ferro-niobium and industrial pure iron as raw materials, and the composition range is as follows: Cr: 10.0wt.%; B: 2.7wt.%; C: 0.8wt.% %; Nb: 0.6wt.%; See Table 2 for the control of impurity elements. Induction melting and centrifugal iron mold casting are adopted, the melting temperature is 1500°C, and the casting temperature is about 1400°C. When the temperature of the ingot is about 800°C, the iron mold is opened and air-cooled. The ingot weighs 120kg and the thickness is 30mm.

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Abstract

The invention provides a high-hardness, wear-resistant and corrosion-resistant alloy of an amorphous / nanocrystal matrix and a preparation method of the high-hardness, wear-resistant and corrosion-resistant alloy. The high-hardness, wear-resistant and corrosion-resistant alloy of the amorphous / nanocrystal matrix comprises the following elements in percentages by mass: 9.0-12.0 of Cr, 2.6-2.9 of B, 0.7-0.9 of C, 0.4-0.8 of Nb, 0.4-0.8 of V, less than 0.3 of Mn, less than 0.07 of Si, less than or equal to 0.01 of S and P, and the balance of Fe, wherein the sum of C and B is 3.3-3.6; the content ratio of C / Cr is 0.06-0.08; and the sum of Nb and V is 0.5-1.0. Through multi-component alloying, an eutectic composition is formed, the melting point is low, fluidity is good, requirements of a casting technology are simple, large wear-resistant and corrosion-resistant castings can be cast, and small precision wear-resistant and corrosion-resistant castings can also be produced. The hardness of the alloy is HRC66-70, and impact toughness of the alloy is 4-9 J / cm (2).

Description

technical field [0001] The invention belongs to the field of high-hardness and wear-resistant cast iron, and relates to a wear-resistant and corrosion-resistant cast iron alloy containing ultrafine hard phases and amorphous / nanocrystalline, supersaturated solid solutions, and martensite matrix phases and a method for preparing components thereof. It is widely used in the manufacture of mechanical wear-resistant parts in electric power, metallurgy, machinery, chemical industry and other industries. [0002] technical background [0003] In the mechanical equipment of mining, metallurgy, electric power and other industries, the widely used wear-resistant materials are nickel-hard cast iron, high-chromium cast iron, high-manganese steel and low-alloy wear-resistant steel. Due to the low hardness of high manganese steel, its wear resistance depends entirely on the work hardening effect during use. Under actual working conditions, it cannot or cannot be fully work hardened, and it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/32C22C38/26C22C38/24C22C38/04C22C38/02C22C33/04C22C45/02C21D1/30
CPCC21D1/30C22C33/04C22C38/02C22C38/04C22C38/24C22C38/26C22C38/32C22C45/02C22C2200/02C22C2200/04
Inventor 卢静罗丰华闵小兵夏光明严淑群贺立牟楠周蓉蓉
Owner 广州市信纳德生物科技有限公司
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