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A kind of preparation method of high-strength aluminum alloy pin shaft

A technology for aluminum alloys and aluminum alloy parts, which is applied in the field of aluminum alloys and can solve problems such as large pollution, high cost, and complicated process flow

Active Publication Date: 2019-01-08
XCMG CONSTR MACHINERY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process of surface quenching and surface carburizing is complex, costly, and polluting

Method used

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  • A kind of preparation method of high-strength aluminum alloy pin shaft
  • A kind of preparation method of high-strength aluminum alloy pin shaft
  • A kind of preparation method of high-strength aluminum alloy pin shaft

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] Aluminum alloy ingots with a diameter of 135 mm were produced by semi-continuous casting. The composition of the aluminum alloy was: Si: 0.4, Fe: 0.45, Cu: 1.7, Mg: 2.4, Mn: 0.3, Cr: 0.2, Zn :5.5, Ti:0.2, Al: balance. A horizontal extrusion machine was used to forward-extrude the aluminum alloy billet with an extrusion ratio of 7.2, an extrusion temperature of 360°C, and an extrusion speed of 4m / min to obtain an extruded blank. Ultrasonic flaw detector was used to judge the size of the extrusion waste area of ​​the extrusion blank, and the extrusion waste area was measured to be 420mm at the head and 450mm at the tail of the aluminum alloy blank, and the extrusion waste area was removed. Solid solution and aging treatment are carried out on the aluminum alloy blank, the solution temperature is 465°C, the solution time is 2.5 hours, the aging temperature is 110°C, and the aging time is 26 hours. Machining the aluminum alloy blank after the solution aging treatment to th...

Embodiment 2

[0097] Aluminum alloy ingots with a diameter of 150 mm were produced by semi-continuous casting. The composition of the aluminum alloy was: Si: 0.4, Fe: 0.5, Cu: 1.2, Mg: 2.1, Mn: 0.3, Cr: 0.22, Zn by weight :5.1, Ti:0.2, Al: balance. A horizontal extrusion machine was used to forward-extrude the aluminum alloy billet with an extrusion ratio of 9.0, an extrusion temperature of 400°C, and an extrusion speed of 3.0 m / min to obtain an extruded blank. Ultrasonic flaw detector was used to determine the size of the extrusion waste area of ​​the extrusion blank, and the extrusion waste area was measured to be 510 mm at the head and 460 mm at the tail of the aluminum alloy blank, and the extrusion waste area was removed. The aluminum alloy blank is subjected to solution and aging treatment, the solution temperature is 470°C, the solution time is 2 hours, the aging temperature is 120°C, and the aging time is 24 hours. Machining the aluminum alloy blank after the solution aging treatme...

Embodiment 3

[0100]Aluminum alloy ingots with a diameter of 250 mm were produced by semi-continuous casting. The composition of the aluminum alloy was: Si: 0.4, Fe: 0.5, Cu: 2.0, Mg: 2.7, Mn: 0.3, Cr: 0.3, Zn by weight :6.0, Ti:0.2, Al: balance. A horizontal extruder is used to forward-extrude the aluminum alloy billet, the extrusion ratio is 25, the extrusion temperature is 450° C., and the extrusion speed is 2.5 m / min to obtain an extruded blank. Ultrasonic flaw detector was used to determine the size of the extrusion waste area of ​​the extrusion blank. The extrusion waste area was measured to be 320mm at the head and 460mm at the tail of the aluminum alloy blank, and the extrusion waste area was removed. The aluminum alloy blank is subjected to solution and aging treatment, the solution temperature is 475°C, the solution time is 1 hour, the aging temperature is 150°C, and the aging time is 22 hours. Machining the aluminum alloy blank after the solution aging treatment to the size of t...

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Abstract

The invention provides a preparation method of an aluminum alloy part. The method comprises the following steps of (i) extruding aluminum alloy billets so as to obtain a blank of the aluminum alloy part; (ii) performing solid solution and aging treatment on the blank of the aluminum alloy part, wherein the solid solution temperature is 450 DEG C to 500 DEG C, the solid solution time is 0.5 hour to 3 hours, the aging temperature is 100 DEG C to 160 DEG C, and the aging time is 20 hours to 30 hours. The aluminum alloy part has the advantages of good anti-fatigue performance and high strength.

Description

technical field [0001] The invention belongs to the field of aluminum alloys, in particular to a method for preparing a high-strength aluminum alloy pin. Background technique [0002] The pin bears high shear and bending loads during operation, and it often fails in the form of wear and fatigue. At present, in the field of construction machinery, alloy steel materials such as 40Cr, 42CrMo, and 35CMo are used as raw materials, and pin shafts are prepared by quenching and tempering→turning→grinding→surface chrome plating. Among them, the quenching and tempering method has long production cycle, high energy consumption, high cost and serious environmental pollution. [0003] In addition, in order to further improve the wear resistance and strength of the pin shaft, on the basis of quenched and tempered steel, surface quenching and surface carburizing are also used in the prior art to replace surface chrome plating. While improving the surface hardness of the pin shaft, the me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/053C22C21/10C25D11/04F16B19/00
CPCC22C21/10C22F1/053C25D11/04F16B19/00
Inventor 崔海霞王光宗李毅朱强张翔李大全
Owner XCMG CONSTR MACHINERY