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A kind of environment-friendly high-strength free-cutting aluminum alloy and preparation method thereof

A high-strength, easy-cutting technology, applied in the field of high-strength easy-cutting aluminum alloys and its preparation, can solve the problems of poor hardness of materials, obstacles to the widespread application of lead-containing aluminum alloys, easy separation of cutting tools and workpieces, etc., to achieve improved Strength, enhanced solid solution strengthening effect, and effect of reducing adverse effects

Active Publication Date: 2020-05-22
JIANGSU ASIA PACIFIC LIGHT ALLOY TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] However, as people pay more attention to environmental issues, the processing waste / recycling of old parts of lead-containing aluminum alloys has become a major obstacle to its wide application.
[0004] The invention patent "a high-strength free-cutting aluminum alloy" with the publication number CN101307403A discloses a high-strength free-cutting aluminum alloy without lead. The tensile strength of the obtained aluminum alloy is as high as 390.81, but the hardness of the material is poor. Easy to separate the cutting tool and the workpiece during sample cutting

Method used

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  • A kind of environment-friendly high-strength free-cutting aluminum alloy and preparation method thereof
  • A kind of environment-friendly high-strength free-cutting aluminum alloy and preparation method thereof

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Embodiment

[0028] An environmentally friendly high-strength free-cutting aluminum alloy, comprising the following components in parts by weight: Si0.6-1.4, Fe≤0.7, Cu 0.2-0.5, Mn 0.2-1.0, Mg 0.6-1.2, Cr≤0.3, Bi0.5~1.5, single content of other impurities≤0.05, total impurities≤0.15, balance is Al.

[0029] A method for preparing an environmentally friendly high-strength free-cutting aluminum alloy, comprising the following steps:

[0030] 1) Melting: Put the aluminum ingot of the AL99.70 grade in the GB / T 1196-2008 standard into the furnace and heat it to 720-760°C for melting;

[0031] 2) Slag removal: Sprinkle the slag removal agent evenly into the furnace at 735±20°C and stir it fully for 10-15 minutes, remove the scum on the surface of the aluminum liquid with a rake, and the amount of the slag removal agent is calculated per ton 0.2~0.4KG;

[0032] 3) Alloy: Si, Fe, Cu, Mn, Mg, Cr, Bi are added when the melt temperature is 730-760°C, among which Si, Cu, Mn, Bi are added in the form...

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Abstract

The invention discloses an environment-friendly high-strength and easy-to-cut aluminum alloy. The environment-friendly high-strength and easy-to-cut aluminum alloy is prepared from the following components in parts by weight: 0.6 to 1.4 parts of Si, less than or equal to 0.7 part of Fe, 0.2 to 0.5 part of Cu, 0.2 to 1.0 part of Mn, 0.6 to 1.2 parts of Mg, less than or equal to 0.3 part of Cr, 0.5to 1.5 parts of Bi, a single impurity with the content of less than or equal to 0.05 part, less than or equal to 0.15 part of total impurities and the balance of Al. According to the environment-friendly high-strength and easy-to-cut aluminum alloy, Si and Mg elements and Cu element have a strengthening effect in the alloy to improve the mechanical strength of the alloy and refine grain structuresof a material; the Bi element is added to replace a common Pb element (the Pb element belongs to a banned substance control element in environment protection) and has the effect of optimizing alloy cutting performance, so that the material is easily subjected to chip breaking in a machining process and is not wound on a knife. The final tensile strength of the material can reach 400Mpa or more and the material rigidity can reach HB 110 or more.

Description

technical field [0001] The invention relates to an environment-friendly high-strength free-cutting aluminum alloy and a preparation method thereof. Background technique [0002] The alloy contains a certain amount of one or more elements such as sulfur, phosphorus, lead, calcium, selenium, tellurium, etc., which is a free-cutting alloy. And a class of materials with good cutting performance. Free-cutting alloys are suitable for making large quantities of parts processed by automatic cutting machine tools. During the cutting process, compared with non-free cutting, it can prolong tool life, reduce cutting resistance, improve the surface finish of processing, and easily remove chips. [0003] However, as people pay more attention to environmental issues, the recycling of lead-containing aluminum alloy processing waste / old parts has become a major obstacle to its wide application. [0004] The invention patent "a high-strength free-cutting aluminum alloy" with the publication...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/08C22C21/02C22C1/02C22F1/04C22F1/05
CPCC22C1/026C22C21/003C22C21/02C22C21/08C22F1/04C22F1/05
Inventor 史俊强糜丽燕
Owner JIANGSU ASIA PACIFIC LIGHT ALLOY TECH CO LTD
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