CN105316508A

CN105316508A - Aluminum alloy refining agent containing Ce, La and Er

Info

Publication number: CN105316508A
Application number: CN201510687620.1A
Authority: CN
Inventors: 梁健
Original assignee: GUANGXI PINGGUO ALUMINUM PRECISION CASTING Co Ltd
Current assignee: TONGSHAN COUNTY FENGHUA INDUSTRY & TRADE Co.,Ltd.
Priority date: 2015-10-21
Filing date: 2015-10-21
Publication date: 2016-02-10
Anticipated expiration: 2035-10-21
Also published as: CN105316508B

Abstract

The invention discloses an aluminum alloy refining agent containing Ce, La and Er. The aluminum alloy refining agent comprises a material A and a material B, wherein the material A comprises, by weight, 70-80 parts of NaCl, 50-56 parts of KCl, 10-15 parts of CaCl2, 30-36 parts of NaF, 10-12 parts of AlF3, 10-12 parts of sodium fluoroaluminate, 12-18 parts of marble powder and 15-25 parts of light calcium carbonate; the material B is composed of C2Cl6, TiO2 and metal with the weight ratio of 5: 1.5-2: 1-1.5, and the metal is mixed metal containing Mg, Ce, La and Er; the material A and the material B are matched for use and the weight ratio is 2-4: 1. The refining agent is used for refining aluminum alloy, the hydrogen content of an aluminum alloy melt can be reduced effectively, and oxide inclusion of the aluminum alloy melt is removed.

Description

A kind of aluminum refining agent containing cerium lanthanum erbium

Technical field

The present invention relates to aluminium alloy smelting manufacture field, particularly a kind of aluminum refining agent containing cerium lanthanum erbium.

Background technology

In defense technology fields such as aerospace, the application of large aluminum alloy foundry goods gets more and more, more and more higher to the requirement of foundry goods, except will ensureing its chemical composition, mechanical property and dimensional precision, also do not allow foundry goods to have the defects such as shrinkage cavity, pore, seepage, slag inclusion; Purifying aluminium alloy melt process is one of basic guarantee measure of producing high-quality aluminium casting, is also the Main Means improving aluminium alloy over-all properties.Aluminium alloy melt refining effect to loose, pore, to be mingled with etc. be formed with material impact, and directly affect the physicals of aluminium casting, mechanical property and use properties; Therefore, the quality improving alloy molten solution is then improve the important step of casting quality; The main task of aluminium alloy melt process improves purity and the modification effect of molten aluminium alloy.

Although current aluminum refining agent can some be mingled with and reduce hydrogen richness by removing, but for being mingled with more aluminium alloy smelting process, particularly be mingled with removal effect containing tiny inclusion, nonmetal oxide etc. and do not reach requirement, and also cannot realize while removal aluminium alloy melt impurity, refinement carried out to aluminium alloy melt and goes bad, thus improving mechanics and the use properties of aluminum alloy casting better.

Summary of the invention

The invention provides a kind of aluminum refining agent containing cerium lanthanum erbium, effectively can reduce the hydrogen content of aluminium alloy melt, remove the oxide inclusion of aluminium alloy melt.

For achieving the above object, technical scheme of the present invention is:

Containing an aluminum refining agent for cerium lanthanum erbium, comprise A material and B material, wherein, described A material comprises the raw material of following weight part: NaCl70 ~ 80 part, KCl50 ~ 56 part, CaCl ₂10 ~ 15 parts, NaF30 ~ 36 part, AlF ₃10 ~ 12 parts, sodium fluoroaluminate 10 ~ 12 parts, marble flour 12 ~ 18 parts, light calcium carbonate 15 ~ 25 parts; Described B material is by C ₂cl ₆, TiO ₂form by weight 5:1.5 ~ 2:1 ~ 1.5 with metal, described metal is the hybrid metal comprising Mg, Ce, La, Er; A material and B expect with the use of, weight ratio is 2 ~ 4:1.

Preferably, in described B material, each metal is by following weight: Mg50 ~ 60 part, Ce10 ~ 15 part, La10 ~ 15 part, Er8 ~ 12 part.

Preferably, described A material comprises the raw material of following weight part: NaCl75 part, KCl53 part, CaCl ₂12 parts, NaF33 part, AlF ₃11 parts, sodium fluoroaluminate 11 parts, marble flour 16 parts, light calcium carbonate 20 parts.

Preferred, in described B material, each metal is by following weight: Mg55 part, Ce12 part, La12 part, Er10 part.

Preferably, the weight proportion that described A material and B expect is 3:1.

Preferably, described B material is by C ₂cl ₆, TiO ₂form by weight 5:1.8:1.2 with metal.

Containing a using method for the aluminum refining agent of cerium lanthanum erbium, comprise the following steps:

S1, when the temperature of smelting furnace rises to 650-690 DEG C, spray into A material, add-on is 0.1 ~ 2.5g/kg liquation, fully stirs, skims;

S2, when the temperature of smelting furnace rises to 780-810 DEG C, spray in proportion B material, fully stir, skim;

S3, routinely technique leave standstill insulation, then pour into a mould, cool and thermal treatment.

What said components raw material played respectively act as:

NaCl and KCl: to solid-state Al ₂o ₃, inclusion and oxide film have very strong wetting capacity, and the proportion of NaCl and KCl only has 1.55g/cm under smelting temperature ³l.50g/cm ³, be significantly less than the proportion of molten aluminium, therefore aluminium alloy melt surface can be spread over well, the broken oxide film with adsorbing bath surface;

CaCl ₂: muriate, surface tension is little, and wettability is good, with NaCl and KCl with the use of;

NaF, AlF ₃and sodium fluoroaluminate: mainly play refining effect, as absorption, dissolve Al ₂o ₃; Villiaumite can also remove the oxide film of bath surface effectively, improves degassing effect;

Light calcium carbonate and marble flour: the whipping agent of high-quality, sweetening agent, marble flour can improve the thickness of foam;

C ₂cl ₆: water absorbability is low, easy to use, and refining effect is good, and has Grain Refinement Effect;

Mg, Ce, La, Er: basic metal and rare earth metal, have good modification effect to molten aluminium alloy, obviously can reduce grain-size, improves the homogeneity of aluminum products; And rare earth simple substance can replace with absorption melt in impurities H become complex compound REH ₂or REH ₃reach the effect of degasification.

When refining agent of the present invention is used for refining aluminium alloy, be blown in smelting furnace with the use of nitrogen or argon gas, and spray into different raw materials at twice, can obtain good dehydrogenation effect, its advantage comprises:

(1) in the process of refining, Mg, Ce, La and Er element is added, especially the adding of this several rare earth element of Ce, La and Er, can realize, in dehydrogenation with while removing oxide inclusion, playing rotten and refining effect to aluminum alloy organization, improve the mechanical property of alloy;

(2) dehydrogenation successful, H content can drop to the level of about 0.10 ~ 0.16ml/100gAl;

(3) fully can remove the oxide inclusion in melt, slagging-off rate can reach more than 90%;

(4) this molten aluminium alloy is used for cast aluminum alloy pig, and gained aluminum alloy ingot fractograph is fine and close, does not have slag and inclusion.

Embodiment

Below in conjunction with specific embodiment, the invention will be further described, but protection scope of the present invention and range of application are not limited to following examples:

Embodiment 1

Containing an aluminum refining agent for cerium lanthanum erbium, comprise A material and B material, wherein, A material comprises the raw material of following weight part: NaCl75 part, KCl53 part, CaCl ₂12 parts, NaF33 part, AlF ₃11 parts, sodium fluoroaluminate 11 parts, marble flour 16 parts, light calcium carbonate 20 parts; B material is by C ₂cl ₆, TiO ₂form by weight 5:1.8:1.2 with metal, each metal is by following weight: Mg55 part, Ce12 part, La12 part, Er10 part; A material and B material are prepared burden by weight 3:1.

The using method of the above-mentioned aluminum refining agent containing cerium lanthanum erbium, comprises the following steps:

S1, when the temperature of smelting furnace rises to 650-670 DEG C, spray into A material, add-on is 1.5g/kg liquation, fully stirs, skims;

S2, when the temperature of smelting furnace rises to 780-800 DEG C, spray into B material, add-on is 0.5g/kg liquation, fully stirs, skims;

When using the above-mentioned aluminum refining agent refining aluminium alloy containing cerium lanthanum erbium, the H content of molten aluminium can drop to the level of about 0.10 ~ 0.13ml/100gAl; Fully can remove the oxide inclusion in melt, slagging-off rate can reach more than 93%; This molten aluminium alloy pours into aluminum alloy ingot, and gained aluminum alloy ingot fractograph is fine and close, does not have slag and inclusion.

Embodiment 2

Containing an aluminum refining agent for cerium lanthanum erbium, comprise A material and B material, wherein, A material comprises the raw material of following weight part: NaCl80 part, KCl56 part, CaCl ₂15 parts, NaF30 part, AlF ₃10 parts, sodium fluoroaluminate 10 parts, marble flour 12 parts, light calcium carbonate 15 parts; B material is by C ₂cl ₆, TiO ₂form by weight 5:1.5:1.5 with metal, each metal is by following weight: Mg50 part, Ce15 part, La15 part, Er12 part; A material and B material are prepared burden by weight 4:1.

S1, when the temperature of smelting furnace rises to 670-690 DEG C, spray into A material, add-on is 0.2g/kg liquation, fully stirs, skims;

S2, when the temperature of smelting furnace rises to 790-810 DEG C, spray into B material, add-on is 0.05g/kg liquation, fully stirs, skims;

When using the above-mentioned aluminum refining agent refining aluminium alloy containing cerium lanthanum erbium, the H content of molten aluminium can drop to the level of about 0.13 ~ 0.16ml/100gAl; Fully can remove the oxide inclusion in melt, slagging-off rate can reach more than 90%; This molten aluminium alloy pours into aluminum alloy ingot, and gained aluminum alloy ingot fractograph is fine and close, does not have slag and inclusion.

Embodiment 3

Containing an aluminum refining agent for cerium lanthanum erbium, comprise A material and B material, wherein, A material comprises the raw material of following weight part: NaCl70 part, KCl50 part, CaCl ₂10 parts, NaF36 part, AlF ₃12 parts, sodium fluoroaluminate 12 parts, marble flour 18 parts, light calcium carbonate 25 parts; B material is by C ₂cl ₆, TiO ₂form by weight 5:2:1 with metal, each metal is by following weight: Mg60 part, Ce10 part, La10 part, Er8 part; A material and B material are prepared burden by weight 2:1.

S1, when the temperature of smelting furnace rises to 660-680 DEG C, spray into A material, add-on is 2.5g/kg liquation, fully stirs, skims;

S2, when the temperature of smelting furnace rises to 790-810 DEG C, spray into B material, add-on is 1.25g/kg liquation, fully stirs, skims;

When using the above-mentioned aluminum refining agent refining aluminium alloy containing cerium lanthanum erbium, the H content of molten aluminium can drop to the level of about 0.10 ~ 0.13ml/100gAl; Fully can remove the oxide inclusion in melt, slagging-off rate can reach more than 92%; This molten aluminium alloy pours into aluminum alloy ingot, and gained aluminum alloy ingot fractograph is fine and close, does not have slag and inclusion.

Claims

1., containing an aluminum refining agent for cerium lanthanum erbium, it is characterized in that:

Described refining agent comprises A material and B material, and wherein, described A material comprises the raw material of following weight part: NaCl70 ~ 80 part, KCl50 ~ 56 part, CaCl ₂10 ~ 15 parts, NaF30 ~ 36 part, AlF ₃10 ~ 12 parts, sodium fluoroaluminate 10 ~ 12 parts, marble flour 12 ~ 18 parts, light calcium carbonate 15 ~ 25 parts; Described B material is by C ₂cl ₆, TiO ₂form by weight 5:1.5 ~ 2:1 ~ 1.5 with metal, described metal is the hybrid metal comprising Mg, Ce, La, Er; A material and B expect with the use of, weight ratio is 2 ~ 4:1.

2. the aluminum refining agent containing cerium lanthanum erbium according to claim 1, is characterized in that:

In described B material, each metal is by following weight: Mg50 ~ 60 part, Ce10 ~ 15 part, La10 ~ 15 part, Er8 ~ 12 part.

3. the aluminum refining agent containing cerium lanthanum erbium according to claim 1, is characterized in that:

Described A material comprises the raw material of following weight part: NaCl75 part, KCl53 part, CaCl ₂12 parts, NaF33 part, AlF ₃11 parts, sodium fluoroaluminate 11 parts, marble flour 16 parts, light calcium carbonate 20 parts.

4. the aluminum refining agent containing cerium lanthanum erbium according to claim 2, is characterized in that:

In described B material, each metal is by following weight: Mg55 part, Ce12 part, La12 part, Er10 part.

5. the aluminum refining agent containing cerium lanthanum erbium according to claim 1, is characterized in that:

The weight proportion that described A material and B expect is 3:1.

6. the aluminum refining agent containing cerium lanthanum erbium according to claim 1, is characterized in that:

Described B material is by C ₂cl ₆, TiO ₂form by weight 5:1.8:1.2 with metal.

7. a using method for the aluminum refining agent containing cerium lanthanum erbium according to any one of claim 1 ~ 6, is characterized in that comprising the following steps: