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Cerium modified abrasion-resisting alloy and casting method thereof

A wear-resistant alloy and alloy technology, which is applied in the manufacture of mechanical wear-resistant parts, the alloy of wear-resistant and corrosion-resistant cast iron and the preparation of its components, can solve the problems of low strength index, insufficient impact toughness, low bending strength, etc.

Active Publication Date: 2019-07-05
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, ranging from 346 to 477 MPa, 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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  • Cerium modified abrasion-resisting alloy and casting method thereof
  • Cerium modified abrasion-resisting alloy and casting method thereof
  • Cerium modified abrasion-resisting alloy and casting method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Embodiment 1. adopt iron powder and Ce 2 o 3 After the powder is evenly mixed, it is molded into a powder briquette. Ce 2 o 3 The mass ratio of powder to iron powder is approximately 1:5, that is, Fe-Ce of Fe-14.23wt.%Ce is formed 2 o 3 Mixed briquettes. As a carrier for the modification of rare earth Ce.

[0048] Select high-carbon ferrochrome, micro-carbon ferrochrome, ferroboron, ferro-niobium, ferro-vanadium, industrial pure iron and the above-mentioned Fe-Ce 2 o 3 Mixed briquettes are used 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.%; Ce: 0.8wt.% %; See Table 2 for the control of impurity elements. 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...

Embodiment 2

[0050] Embodiment 2. adopt iron powder and Ce 2 o 3 After the powder is evenly mixed, it is molded into a powder briquette. Ce 2 o 3 The mass ratio of powder to iron powder is roughly 1:20, that is, Fe-Ce of Fe-4.06wt.%Ce is formed 2 o 3 Mixed briquettes. As a carrier for the modification of rare earth Ce.

[0051] Select high-carbon ferrochrome, metal chromium, ferroboron, ferroniobium, industrial pure iron and the above-mentioned Fe-Ce 2 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.%; Ce: 0.03wt.%; the control of impurity elements is shown in the table 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. ...

Embodiment 3

[0053] Embodiment 3. adopt iron powder and Ce 2 o 3 After the powder is evenly mixed, it is molded into a powder briquette. Ce 2 o 3 The mass ratio of powder to iron powder is roughly 1:10, that is, Fe-Ce of Fe-7.76wt.%Ce is formed 2 o 3 Mixed briquettes. As a carrier for the modification of rare earth Ce.

[0054] Select high-carbon ferrochrome, micro-carbon ferrochrome, ferroboron, ferroniobium, industrial pure iron and the above-mentioned Fe-Ce 2 o 3 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.%; Ce: 0.6wt.%; the control of impurity elements is shown in the table 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:

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Abstract

The invention discloses a cerium modified abrasion-resisting alloy and a casting method thereof. The alloy is prepared from the elements in percentage by mass that 9.0-13.0 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, 0.03-1.2 of Ce and the balance of Fe, wherein the total amount of the C and the B is 3.3-3.6, the content ratio of the C / the Cr is 0.06-0.08,the total amount of the Nb and the V is 0.5-1.0, Fe-Ce2O3, Fe-cerium nitrate or Fe-cerium carbonate powder briquette is firstly prepared, after batching, melting and modification treatment are conducted on the alloy, the alloy is casted, and the range of the casting temperature is 1250-1320 DEG C. According to the cerium modified abrasion-resisting alloy and the casting method thereof, casting ingot HRC is 66.4-71.5, impact toughness reaches 11.8-16.6 J / cm<2>, and bending strength reaches 1216-1546 MPa.

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 with cerium-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, good smelting-casting processability, and has very broad application prospects. [0004] 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 accord...

Claims

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Application Information

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IPC IPC(8): C22C38/32C22C38/26C22C38/24C22C38/04C22C33/06C21D6/00C21D1/18
CPCC22C38/32C22C38/26C22C38/24C22C38/04C22C38/005C22C33/06C21D6/002C21D1/18
Inventor 罗丰华周海铭牟楠刘浪飞郭代健陈雪阳
Owner CENT SOUTH UNIV
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