CN106676296A - Production process of ZLD102 aluminum alloy - Google Patents

Abstract

The invention discloses a production process of ZLD102 aluminum alloy. The production process comprises the following steps: firstly, adding an aluminum ingot into a resistance furnace for temperature rise and melting; adding industrial silicon into the resistance furnace when the temperature of a melt reaches 900 DEG C or higher; after the industrial silicon is melted, detecting whether chemical components meet the following standard or not: Fe: less than or equal to 0.1%, Si: 10 to 13%, Mg: less than or equal to 0.1%, Cu: less than or equal to 0.3%, Mn: less than or equal to 0.5%, and Zn: less than or equal to 0.1%; then controlling the temperature of the melt to be 710 to 720 DEG C, and adding a refining agent for refining, wherein the dosage of the refining agent is 3kg/ton, and the refining time is 10 to 20 minutes; removing surface slag after refining; adding aluminum-strontium alloy for modification treatment, wherein the strontium content of a final product is controlled to be 0.015 to 0.03 wt%, and the modification treatment temperature is 700 to 720 DEG C; and finally, casting. According to the production process, the present situation that the physical properties of the ZLD102 aluminum alloy are low and the subsequent processing is unsatisfactory is well solved.

Description

A kind of production technology of ZLD102 aluminium alloys

Technical field

The present invention relates to a kind of production technology of ZLD102 aluminium alloys.

Background technology

ZLD102 cast aluminium alloy golds（Alusil alloy）With good casting character, without hot tearing and loose tendency, air-tightness Higher, its density is small, and corrosion resistance is good, can be used in by air, the environment of seawater corrosion, is primarily suitable for die casting, is used for Bear the complex-shaped thin-section casting of underload, such as various instrument housings, automobile casing, dental equipment, piston.

The production technology scheme of traditional ZLD102 aluminium alloys：1. chemical composition：Fe content≤0.3%, first will Al99.70% aluminium ingots are added and melted in stove, 900 degree plus 553 industrial silicons are warming up to, for being completely dissolved for silicon, SiClx process Middle diligent stirring, high temperature melting industrial silicon more than 2 hours after silicon all melts, is sufficiently stirred for, and silicon can sufficiently be spread, and makes Evenly, sampling is detected silicon after standing, after chemical composition is qualified, takes physical property detection test bar, will according to standard After test bar processing, detect tensile strength, the elongation percentage of product.The tensile strength of the ZLD102 of produced in conventional processes 150MPa or so, elongation 2% or so, current aluminium-silicon alloy casting large usage quantity proposes requirement higher to properties of product, It is current problem that elongation percentage is improved for aluminium-silicon alloy casting.

Another production technology scheme is：On the requirement of ZLD102 alloy pigs chemical composition is ensured, invigoration effect has been added Trace element.Aluminium ingot is added and is melted in stove, treat that temperature reaches more than 900 degree, load weighted industrial silicon is added into stove Inside melted, for being completely dissolved for silicon, diligent stirring during SiClx, high temperature melting industrial silicon more than 2 hours treats silicon whole After thawing, it is sufficiently stirred for, silicon can sufficiently be spread, make silicon evenly, aluminium copper, manganese agent are added afterwards, addition is 0.02%-0.05%, sampling analysis, takes physical property detection test bar afterwards after chemical composition is qualified.The program is to alloy inside Tissue does not improve significantly without improvement to alloy physical property（After processed stretching, tensile strength 150MPa or so, Elongation 2% or so）, the production cost of alloy pig is increased on the contrary.

The content of the invention

The technical problem to be solved in the present invention is to overcome that existing ZLD102 aluminium alloys physical property is low, following process is undesirable Defect, there is provided a kind of production technology of ZLD102 aluminium alloys.

In order to solve the above-mentioned technical problem, the invention provides following technical scheme：

A kind of production technology of ZLD102 aluminium alloys, step is as follows：

（1）Fusing：Aluminium ingot is added in resistance furnace first, heat up fusing, treats that melt temperature reaches more than 900 DEG C and adds industrial silicon Enter in stove, after after silicon fusing, detection chemical composition meets following standard：Fe≤0.1%、Si 10-13%、Mg≤0.1%、Cu≤ 0.3%、Mn≤0.5%、Zn≤0.1%；

（2）Refining：By melt temperature control at 710~720 DEG C, refining agent refining, 3kg/ tons of refining agent consumption, during refining are added Between 10-20 minutes；

（3）Metamorphism treatment：Surface slag is removed after refining, adds al-sr alloy to carry out Metamorphism treatment, strontium contains in control final products Amount is in 0.015wt%~0.03wt%, 700~720 DEG C of Metamorphism treatment temperature；

（4）Casting.

Brief description of the drawings

Accompanying drawing is used for providing a further understanding of the present invention, and constitutes a part for specification, with reality of the invention Applying example is used to explain the present invention together, is not construed as limiting the invention.In the accompanying drawings：

Fig. 1 is the Metallographic Analysis figure of aluminium alloy.

Specific embodiment

The preferred embodiments of the present invention are illustrated below in conjunction with accompanying drawing, it will be appreciated that preferred reality described herein Apply example to be merely to illustrate and explain the present invention, be not intended to limit the present invention.

Raw material requirement：1. Al99.9% aluminium ingots, Al99.70% aluminium ingots, quality meets the requirement of GB/T1196-2008 standards； 2. 553 industrial silicon, quality meets the requirement of GB/T2881-2014 standards.

（1）Fusing：First by ready aluminium ingot add resistance furnace in, heat up fusing, treat melt temperature reach 900 DEG C with On, industrial silicon is added in stove, after after silicon fusing, detection chemical composition meets following standard：Fe≤0.1%、Si 10-13%、Mg ≤0.1%、Cu≤0.3%、Mn≤0.5%、Zn≤0.1%。

（2）Refining：After detection is qualified, by melt temperature control at 710~720 DEG C, refining agent is used afterwards（Xuzhou swallow forever Aluminum Co., Ltd, model RJ-2）Refining, 3kg/ tons, refining time 10-20 minutes of refining agent consumption.

（3）Metamorphism treatment：Surface slag is removed after refining, adds al-sr alloy to carry out Metamorphism treatment, Metamorphism treatment temperature control Make at 700-720 DEG C, after standing 5 minutes, sampling analysis, content of strontium control is in 0.015%-0.03% in final products.

（4）Casting.

The chemical composition of final products：Fe≤0.1%、Si：10-13%、Mg≤0.1%、Cu≤0.3%、Mn≤0.5%、Zn ≤ 0.1%, Sr 0.015-0.03%, balance of Al.Outward appearance meets：GB/T 8733-2007 requirements.

Unless otherwise instructed, " % " of above-mentioned expression content is weight/mass percentage composition.

In June, 2016 amounts to the heat of pilot production 8, takes test bar, and testing result is as follows：

Result shows：Tensile strength, elongation are all greatly improved before relatively going bad before and after rotten.

Metallographic Analysis such as Fig. 1（Before A is rotten, after B is to go bad）Shown, alloy interior tissue has very big change, Si's Tissue morphology turns to corynebacterium or fibre by thick block primary silicon and needle shaped eutectic silicon tissue long by becoming after Metamorphism treatment Dimension, the weak link of alusil alloy is improved.

Finally it should be noted that：The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, Although being described in detail to the present invention with reference to the foregoing embodiments, for a person skilled in the art, it still may be used Modified with to the technical scheme described in foregoing embodiments, or equivalent is carried out to which part technical characteristic. All any modification, equivalent substitution and improvements within the spirit and principles in the present invention, made etc., should be included in of the invention Within protection domain.

Claims (1)

1. a kind of production technology of ZLD102 aluminium alloys, step is as follows：

（1）Fusing：Aluminium ingot is added in resistance furnace first, heat up fusing, treats that melt temperature reaches more than 900 DEG C and adds industrial silicon Enter in stove, after after silicon fusing, detection chemical composition meets following standard：Fe≤0.1%、Si 10-13%、Mg≤0.1%、Cu≤ 0.3%、Mn≤0.5%、Zn≤0.1%；

（2）Refining：By melt temperature control at 710~720 DEG C, refining agent refining, 3kg/ tons of refining agent consumption, during refining are added Between 10-20 minutes；

（3）Metamorphism treatment：Surface slag is removed after refining, adds al-sr alloy to carry out Metamorphism treatment, strontium contains in control final products In 0.015wt%~0.03wt%, Metamorphism treatment temperature is 700~720 DEG C to amount；

（4）Casting.