CN101748317A

CN101748317A - Wear-resisting high-strength aluminum alloy material and manufacturing technology thereof

Info

Publication number: CN101748317A
Application number: CN200810231204A
Authority: CN
Inventors: 李海军
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-12-04
Filing date: 2008-12-04
Publication date: 2010-06-23

Abstract

The invention relates to a wear-resisting high-strength aluminum alloy and a manufacturing method thereof, which is realized by the following technical scheme that the wear-resisting high-strength aluminium alloy comprises the following chemical compositions in percentage by weight: 7.6-8.3% of silicon, 2.5-3.5% of copper, 1.2-1.4% of iron, 0.3-0.5% of magnesium, 0.1-0.05% of rare earth and the balance of aluminium; a cylinder body comprises the following chemical compositions in percentage by weight, and impurity contents are not more than the following percent: 0.3% of zinc, 0.2% of lead, 0.2% of chromium, 0.1% of tin, 0.1% of nickel and 0.1% of titanium. The wear-resisting high-strength aluminum alloy is obtained by burdening, refining, deteriorating, pouring and quenching. After adopting the invention, because the internal chemical composition and the manufacturing technology of the material are changed and improved, internal tissue is compact, has toughness and has the advantages of favorable cast forming performance and working quality, favorable abrasive resistance and low cost.

Description

A kind of wear-resisting high-strength aluminum alloy material and manufacturing process thereof

Technical field

The present invention relates to a kind of wear-resisting high-strength aluminum alloy material and manufacturing process thereof.

Background technology

Existing high-strength abrasion-proof aluminum alloy material generally adopts matrix material to carry out high-pressure casting and forms.This manufacturing process used device cost height exists the not good enough phenomenon of technical indicator, and the as cast condition bad mechanical property is generally at 150---180MPa, hardness is low, and it is poor to cut, and wears no resistance, the product processing difficulties, roughness is poor, thereby has influenced the serviceability of high-strength abrasion-proof aluminum alloy.Foundry goods need all carry out " saturation process " subsequent handling.

Summary of the invention

The objective of the invention is to overcome above-mentioned deficiency, improve a kind of obdurability that has, aluminum alloy materials and manufacturing process thereof that high mill property is good, hardness is high.

Purpose of the present invention is achieved through the following technical solutions: a kind of wear-resisting high-strength aluminum alloy material, the chemical ingredients of described material is calculated with weight, and it constitutes 7.6～8.3% silicon, 2.5～3.5% bronze medals, 1.2～1.4% iron, 0.3～0.5% magnesium, 0.1～0.05% rare earth surplus is aluminium.The chemical ingredients of described material is calculated with weight, and the content of its impurity is not more than: 0.3% zinc, 0.2% lead, 0.2% chromium, 0.1% tin, 0.1% nickel, 0.1% titanium.

The manufacturing process of above-mentioned wear-resisting high-strength aluminum alloy material is:

(1), will state the raw material of aluminum alloy that ratio is equipped with and in holding furnace, carry out melting in described, remove steam turbine by refining again and use the injection refining agent that aluminium alloy solution is carried out refining degasification, the rotten processing; Then alloy liquid is poured in the required mold cavity of making, once shaped becomes work in-process.

(2), work in-process that described low-pressure casting is made put into quenching furnance and carry out solution treatment, temperature was taken out through aging oven for 200～220 ℃ then in 3～6 hours, take out and put into the machine oil chilling, after Cutter Body Processing with Machining Center form.

After adopting the present invention, because the inside chemical ingredients of this cylinder body and variation, the improvement of manufacturing process make its dense internal organization, good toughness, its casting formability, excellent processability, wear resistance is good, and cost is low; Its tensile strength sigma _bCan reach 300---330MPa, unit elongation δ rises to 1～2%, and Brinell hardness reaches 120-140HBS.

Embodiment

A kind of wear-resisting high-strength aluminum alloy material, the chemical ingredients of described material is calculated with weight, and it constitutes 7.6～8.3% silicon, 2.5～3.5% bronze medals, 1.2～1.4% iron, 0.3～0.5% magnesium, 0.1～0.05% rare earth surplus is aluminium.The chemical ingredients of described material is calculated with weight, and the content of its impurity is not more than: 0.3% zinc, 0.2% lead, 0.2% chromium, 0.1% tin, 0.1% nickel, 0.1% titanium.

The aluminium alloy that this invention is made is used for engine cylinder-body, and its wear resistance is good, toughness is high, intensity is big, has improved engine compression ratio, has the advantage of tangible saving cost with present material.

Claims

1. wear-resisting high-strength aluminum alloy material, it is characterized in that: the chemical ingredients of described material is calculated with weight, and it constitutes 7.6～8.3% silicon, 2.5～3.5% bronze medals, 1.2～1.4% iron, 0.3～0.5% magnesium, 0.1～0.05% rare earth surplus is aluminium.

2. a kind of wear-resisting high-strength aluminum alloy material according to claim 1, it is characterized in that: the chemical ingredients of described cylinder body is calculated with weight, and the content of its impurity is not more than: 0.3% zinc, 0.2% lead, 0.2% chromium, 0.1% tin, 0.1% nickel, 0.1% titanium.

3. the manufacturing process of a wear-resisting high-strength aluminum alloy material, it is characterized in that: the chemical ingredients of contained material is calculated with weight, it constitutes 7.6～8.3% silicon, 2.5～3.5% bronze medals, 1.2～1.4% iron, 0.3～0.5% magnesium, 0.1～0.05% rare earth surplus is aluminium, and the content of its impurity is not more than: 0.3% zinc, 0.2% lead, 0.2% chromium, 0.1% tin, 0.1% nickel, 0.1% titanium; Comprise following steps:

(1), will state the raw material of aluminum alloy that ratio is equipped with and in holding furnace, carry out melting in described, remove steam turbine by refining again and use the injection refining agent that aluminium alloy solution is carried out refining degasification, the rotten processing; Then alloy liquid is poured in the required mold cavity of making, once shaped becomes work in-process;