CN-122013058-A - Alloy, preparation method and application thereof, and ball valve part

Abstract

The invention relates to an alloy, a preparation method and application thereof, and a ball valve part, and relates to the technical field of alloy materials, wherein the alloy comprises, by weight, 100 parts of scrap steel, 0.05-0.12 part of ferrovanadium and 0.01-0.05 part of composite rare earth, and the composite rare earth consists of Ce and La in a weight ratio of (25-30): (70-75). The invention mainly improves the comprehensive properties of the alloy such as hardness, tensile strength, impact toughness and the like through the design of alloy formula components and the optimization of the preparation process, can meet the use requirements of mechanical devices such as ball valve parts and the like, and has wide application.

Inventors

• OU GUOSHENG
• LAI DAFU

Assignees

• 成都成化机械制造有限公司

Dates

Publication Date

20260512

Application Date

20260306

Claims (10)

1. 1. The alloy is characterized by comprising the following raw materials in parts by weight: 100 parts of scrap steel, 0.05-0.12 part of ferrovanadium and 0.01-0.05 part of composite rare earth; the composite rare earth consists of Ce and La in a weight ratio of (25-30) to (70-75).
2. 2. The alloy of claim 1, wherein the weight fraction of the ferrovanadium W 1 and the weight fraction of the composite rare earth W 2 satisfy the following relationship 0.10≤W 1 + α·W 2 + β·(W 1 ·W 2 ). Ltoreq.0.24, wherein α is 2.0 and β has a value of 2.8.
3. 3. The alloy of claim 1, wherein the alloy comprises the following raw materials in parts by weight: 100 parts of scrap steel, 0.08 part of ferrovanadium and 0.03 part of composite rare earth.
4. 4. The alloy of claim 1, wherein the composite rare earth consists of Ce and La in a weight ratio of 28:72; and/or, the scrap comprises Q235 scrap.
5. 5. A method for producing an alloy according to any one of claims 1 to 4, comprising the steps of: heating and melting scrap steel, adding preheated ferrovanadium until molten steel is melted, and then desulfurizing, dephosphorizing and deslagging to obtain a first mixed solution; deoxidizing and vacuumizing the first mixed solution, and adding preheated composite rare earth under the argon atmosphere for melting to obtain a second mixed solution; And casting the second mixed solution in an argon atmosphere to form, and then performing heat treatment on the obtained casting to obtain the alloy.
6. 6. The method for producing an alloy according to claim 5, wherein the scrap steel is heated and melted and then preheated ferrovanadium is added to a molten steel melting temperature of 1600.+ -. 10 ℃; And/or, the temperature of the preheated ferrovanadium is 530+/-10 ℃; and/or the temperature of the preheated composite rare earth is 480+/-10 ℃; and/or adding the preheated composite rare earth under the argon atmosphere to melt at the temperature of 1530+/-10 ℃; and/or the temperature of casting molding under argon atmosphere is 1460+/-10 ℃.
7. 7. The method for producing an alloy according to claim 5, wherein the sulfur content in the first mixed solution is 0.005wt% or less; And/or, the phosphorus content in the first mixed solution is less than or equal to 0.005wt percent; And/or the total oxygen content in the molten steel after deoxidizing the first mixed liquid is less than or equal to 30ppm.
8. 8. The method of producing an alloy according to claim 5, wherein the step of heat treating comprises the steps of: And (3) preserving the temperature of the cast obtained after demoulding at 1050 ℃ plus or minus 10 ℃ for 4-5 hours, taking out, cooling to room temperature in quenching liquid, heating to 540 ℃ plus or minus 10 ℃ and preserving the temperature for 8-9 hours, taking out, and cooling to room temperature in air to obtain the alloy.
9. 9. Use of an alloy according to any one of claims 1 to 4 and/or an alloy obtained by a method according to any one of claims 5 to 8 for the production of mechanical devices.
10. 10. A ball valve element, characterized in that it is manufactured from an alloy according to any one of claims 1 to 4 and/or an alloy obtained by a manufacturing method according to any one of claims 5 to 8.

Description

Alloy, preparation method and application thereof, and ball valve part Technical Field The invention relates to the technical field of alloy materials, in particular to an alloy, a preparation method and application thereof, and a ball valve part. Background In the industrial field, alloy materials play a vital role in the manufacture of numerous mechanical devices by virtue of their unique performance advantages. Among them, ball valves are commonly used as control components in industrial piping systems, whose performance directly affects the operational safety and efficiency of the overall piping system. The traditional ball valve material has certain limitations in the aspects of hardness, tensile strength, impact toughness and the like, and is difficult to meet the requirements of some complex working conditions. Therefore, the development of an alloy material with good comprehensive performance for ball valve parts has important practical significance. Disclosure of Invention In order to solve the problems, the embodiment of the invention provides an alloy, a preparation method and application thereof, and a ball valve part. In a first aspect, an embodiment of the present invention provides an alloy, which includes the following raw materials in parts by weight: 100 parts of scrap steel, 0.05-0.12 part of ferrovanadium and 0.01-0.05 part of composite rare earth; the composite rare earth consists of Ce and La in a weight ratio of (25-30) to (70-75). Further, the weight part W 1 of the ferrovanadium and the weight part W 2 of the composite rare earth meet the following relational expression that W 1+ α·W2+ β·(W1·W2 is more than or equal to 0.10 and less than or equal to 0.24, wherein alpha is 2.0, and beta takes a value of 2.8. Further, the alloy comprises the following raw materials in parts by weight: 100 parts of scrap steel, 0.08 part of ferrovanadium and 0.03 part of composite rare earth. Further, the composite rare earth consists of Ce and La in a weight ratio of 28:72; and/or, the scrap comprises Q235 scrap. According to a second aspect, based on the same inventive concept, an embodiment of the present invention provides a method for preparing an alloy according to any one of the first aspects, the method comprising the steps of: heating and melting scrap steel, adding preheated ferrovanadium until molten steel is melted, and then desulfurizing, dephosphorizing and deslagging to obtain a first mixed solution; deoxidizing and vacuumizing the first mixed solution, and adding preheated composite rare earth under the argon atmosphere for melting to obtain a second mixed solution; And casting the second mixed solution in an argon atmosphere to form, and then performing heat treatment on the obtained casting to obtain the alloy. Further, after the scrap steel is heated and melted, preheated ferrovanadium is added until the molten steel is melted down to 1600+/-10 ℃; And/or, the temperature of the preheated ferrovanadium is 530+/-10 ℃; and/or the temperature of the preheated composite rare earth is 480+/-10 ℃; and/or adding the preheated composite rare earth under the argon atmosphere to melt at the temperature of 1530+/-10 ℃; and/or the temperature of casting molding under argon atmosphere is 1460+/-10 ℃. Further, the sulfur content in the first mixed solution is less than or equal to 0.005wt percent in terms of weight percent; And/or, the phosphorus content in the first mixed solution is less than or equal to 0.005wt percent; And/or the total oxygen content in the molten steel after deoxidizing the first mixed liquid is less than or equal to 30ppm. Further, the step of heat treating comprises the following process: And (3) preserving the temperature of the cast obtained after demoulding at 1050 ℃ plus or minus 10 ℃ for 4-5 hours, taking out, cooling to room temperature in quenching liquid, heating to 540 ℃ plus or minus 10 ℃ and preserving the temperature for 8-9 hours, taking out, and cooling to room temperature in air to obtain the alloy. In a third aspect, embodiments of the present invention provide an alloy according to any one of the first aspect, and/or an alloy obtained by a method for preparing an alloy according to any one of the second aspect, for use in the preparation of a mechanical device. In a fourth aspect, embodiments of the present invention provide a ball valve element made from an alloy according to any one of the first aspects and/or from an alloy obtained by the method for producing an alloy according to any one of the second aspects. Compared with the prior art, the technical scheme provided by the embodiment of the invention has at least the following advantages: The embodiment of the invention provides an alloy, a preparation method and application thereof, and a ball valve part, the invention mainly adopts the design of alloy formula components and the optimization of preparation process, the comprehensive properties of the alloy such as hardness, tensile strength, impact to