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A kind of yttrium toughened wear-resistant alloy and its casting and heat treatment method

A heat treatment method and a wear-resistant alloy technology, which are applied in the preparation of wear-resistant and corrosion-resistant cast iron alloys and their components, and in the field of mechanical wear-resistant parts manufacturing, can solve the problems of insufficient impact toughness, low strength index, and low bending strength.

Active Publication Date: 2022-01-28
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hardness of this type of alloy is high, but the impact toughness is insufficient, the strength index is low, and the bending strength is low, in the range of 346-477MPa, which limits the application of this alloy to some occasions where the external load is large and impact resistance is required.

Method used

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  • A kind of yttrium toughened wear-resistant alloy and its casting and heat treatment method
  • A kind of yttrium toughened wear-resistant alloy and its casting and heat treatment method
  • A kind of yttrium toughened wear-resistant alloy and its casting and heat treatment method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Embodiment 1. After adopting iron powder and yttrium carbonate powder to mix uniformly, molded into powder briquettes. The mass ratio of yttrium carbonate powder to iron powder is about 1:3, that is to form Fe-yttrium carbonate mixed compact of Fe-10.8wt.%Y. As the carrier of rare earth Y metamorphism.

[0053] High-carbon ferrochrome, micro-carbon ferrochrome, ferroboron, ferroniobium, ferrovanadium, industrial pure iron and the above-mentioned Fe-yttrium carbonate mixed briquette are selected as raw materials, and the composition range is as follows: Cr: 10.0wt.%; B: 2.9wt .%; C: 0.7wt.%; Nb: 0.4wt.%; V: 0.2wt.%; Y: 1.6wt.%; Small amounts of impurities such as Al, Mn, N, etc. do not cause fundamental changes in alloy properties and are therefore not listed in Table 2. After weighing the corresponding raw materials according to the composition requirements, induction melting and sand mold casting are adopted. The specific steps are:

[0054] Place the Fe-yttrium ca...

Embodiment 2

[0056] Embodiment 2. After iron powder and yttrium carbonate powder are uniformly mixed, molded into a powder briquette. The mass ratio of yttrium carbonate powder to iron powder is about 1:13, that is to form Fe-yttrium carbonate mixed briquettes of Fe-3.09wt.%Y. As the carrier of rare earth Y metamorphism.

[0057] Select high-carbon ferrochrome, metal chromium, ferroboron, ferroniobium, industrial pure iron and the above-mentioned Fe-Y2 o 3 Mixed briquettes are used as raw materials, and the composition range is as follows: Cr: 10.0wt.%; B: 2.7wt.%; C: 0.7wt.%; Nb: 0.5wt.%; Y: 0.08wt.%; 2. Small amounts of impurities such as Al, Mn, N, etc. do not cause fundamental changes in alloy properties and are therefore not listed in Table 2. After weighing the corresponding raw materials according to the composition requirements, the vacuum induction furnace can be used for melting and water-cooled iron mold casting. The specific steps are:

[0058] Place the Fe-yttrium carbona...

Embodiment 3

[0059] Embodiment 3. After adopting iron powder and yttrium carbonate powder to mix uniformly, molded into powder briquettes. The mass ratio of yttrium carbonate powder to iron powder is about 1:10, that is to form Fe-yttrium carbonate mixed briquette with Fe-3.93wt.%Y. As the carrier of rare earth Y metamorphism.

[0060] Select high-carbon ferrochrome, micro-carbon ferrochrome, ferroboron, ferroniobium, industrial pure iron and the above-mentioned Fe-Y 2 o 3 The mixed briquettes are used as raw materials, and the composition range is as follows: Cr: 10.0wt.%; B: 2.7wt.%; C: 0.8wt.%; Nb: 0.6wt.%; Y: 0.1wt.%; 2. Small amounts of impurities such as Al, Mn, N, etc. do not cause fundamental changes in alloy properties and are therefore not listed in Table 2. After weighing the corresponding raw materials according to the composition requirements, induction melting and investment casting are adopted. The specific steps are:

[0061] Place the Fe-yttrium carbonate powder briqu...

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Abstract

A yttrium toughened and wear-resistant alloy and its casting and heat treatment method, the mass percent content of each element of the alloy is Cr: 9.0-13.0, B: 2.6-2.9, C: 0.7-0.9, Nb: 0.4-0.8, V: 0.4~0.8, Mn content is less than 0.3, Y: 0.02~1.6, S, P: ≤0.01, the balance is Fe. Among them, the sum of C and B: 3.3-3.6; the mass ratio of C / Cr: 0.06-0.08; the sum of Nb and V is 0.5-1.0. Get your Fe‑Y ready first 2 o 3 , Fe-yttrium carbonate or Fe-yttrium nitrate powder briquette, alloy ingredients, melting and modification treatment, casting alloy, and then quenching-tempering treatment, casting temperature is 1250 ~ 1320 ° C. The overall hardness of the ingot of the present invention is HRC65.4-69.4, and the impact toughness reaches 12.6-17.1J / cm 2 , the bending strength reaches 1340-1750MPa.

Description

technical field [0001] The invention belongs to the field of high-hardness and wear-resistant cast iron, and relates to an alloy of wear-resistant and corrosion-resistant cast iron with yttrium-modified fine hard phase, supersaturated solid solution, and martensitic matrix phase and a component preparation method thereof, which can be widely used in electric power, Manufacture of mechanical wear-resistant parts in metallurgy, machinery, chemical industry and other industries. [0002] technical background [0003] Fe-Cr-B-C wear-resistant casting alloy is mainly composed of Fe 2 B or M 2 B is a hard phase, which has good toughness, high hardness, high corrosion resistance, and good smelting-casting processability. Modification treatment is one of the effective methods to improve the microstructure and mechanical properties of Fe-Cr-B-C alloy. Modifiers can be divided into strong carbon, nitrogen, and sulfide forming elements according to their functions, such as Ti, V and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/32C22C38/26C22C38/24C22C38/04C22C33/06C21D6/00C21D1/18
CPCC22C38/32C22C38/26C22C38/24C22C38/04C22C38/005C22C33/06C21D6/002C21D1/18
Inventor 罗丰华牟楠唐紫薇付晓虎卢静陈亨
Owner CENT SOUTH UNIV
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