Fine-grained zinc-based alloy for die and preparation process thereof

A preparation process and fine-grained technology, which is applied in the field of metal materials, can solve the problems of accelerating intergranular corrosion of alloys, and achieve the effect of high service life

Inactive Publication Date: 2013-09-25
江苏新亚特钢锻造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adding grain refiners to zinc-based alloys can improve their plasticity and toughness; a small amount of antimony can change the casting properties of zinc-b...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A fine-grained zinc-based alloy for molds provided by the invention consists of a matrix alloy, an intermediate alloy, a modifier and a refining agent. The mass ratio of its components is: Al: 12%, Cu: 8%, Mg: 0.01%, Zr: 0.4%, Ti: 0.10%, B: 0.01%, Si: 1%, Mn: 0.4%, Re modifier : 0.2%, ZnCl 2 Refining agent: 0.4%, the rest is Zn; the mass ratio of Re modifier is: Ce: 45%, La: 10%, Y: 7%, Gd: 4%.

[0036] A fine-grained zinc-based alloy for a mold provided by the present invention and its preparation process, its manufacturing process steps are:

[0037] 1) The materials are industrial zinc ingots, industrial aluminum ingots, industrial magnesium ingots, aluminum-zirconium master alloys, aluminum-manganese master alloys, aluminum-silicon master alloys, ZnCl 2 Industrial refining agent, modifier;

[0038] 2) Preparation of copper-aluminum master alloy: Melt the aluminum in a crucible resistance furnace or an intermediate frequency induction melting furnace, then immerse...

Embodiment 2

[0045] A fine-grained zinc-based alloy for molds provided by the invention consists of a matrix alloy, an intermediate alloy, a modifier and a scouring agent. The mass ratio of its components is: Al: 15%, Cu: 9.5%, Mg: 0.02%, Zr: 0.45%, Ti: 0.12%, B: 0.01%, Si: 1%, Mn: 0.5%, Re modifier : 0.3%, ZnCl 2 Refining agent: 0.4%, the rest is Zn; the mass ratio of Re modifier is: Ce: 48%, La: 13%, Y: 9%, Gd: 5%.

[0046] A fine-grained zinc-based alloy for a mold provided by the present invention and its preparation process, its manufacturing process steps are:

[0047] 1) The materials are industrial zinc ingots, industrial aluminum ingots, industrial magnesium ingots, aluminum-zirconium master alloys, aluminum-silicon master alloys, ZnCl 2 Industrial refining agent, modifier;

[0048] 2) Preparation of copper-aluminum master alloy: Melt the aluminum in a crucible resistance furnace or an intermediate frequency induction melting furnace, then immerse the copper in the aluminum liq...

Embodiment 3

[0055] A fine-grained zinc-based alloy for molds provided by the invention consists of a matrix alloy, an intermediate alloy, a modifier and a refining agent. The mass ratio of its components is: Al: 16%, Cu: 12%, Mg: 0.04%, Ti: 0.2%, B: 0.025%, Si: 3%, Mn: 0.8%, Re modifier: 0.8%, ZnCl 2 Refining agent: 0.5%, the rest is Zn; the mass ratio of Re modifier is: Ce: 55%, La: 20%, Y: 15%, Gd: 10%.

[0056] A fine-grained zinc-based alloy for a mold provided by the present invention and its preparation process, its manufacturing process steps are:

[0057] 1) The materials are industrial zinc ingots, industrial aluminum ingots, industrial magnesium ingots, aluminum-zirconium master alloys, aluminum-manganese master alloys, aluminum-silicon master alloys, ZnCl 2 Industrial refining agent, modifier;

[0058] 2) Preparation of copper-aluminum master alloy: Melt the aluminum in a crucible resistance furnace or an intermediate frequency induction melting furnace, then immerse the copp...

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Abstract

The invention provides a fine-grained zinc-based alloy for a die and a preparation process thereof. The invention is characterized in that the fine-grained zinc-based alloy for the die is composed of a matrix alloy, intermediate alloys, an alterant and a scouring agent and comprises 12.5 to 16.5% of Al, 8 to 12.5% of Cu, 0.01 to 0.05% of Mg, 0.10 to 0.25% of Ti, 0.01 to 0.03% of B, 0.3 to 0.7% of Zr, 1 to 3% of Si, 0.4 to 0.8% of Mn, 0.2 to 0.8% of Re and 0.4 to 0.5% of ZnCl2, with the balance being Zn, wherein Re comprises, by mass, 45 to 55% of Ce, 10 to 20% of La, 7 to 15% of Y and 4 to 10% of Gd. The preparation process comprises the following steps: fusing the alloys in a crucible resistance furnace or a medium-frequency induction melting furnace; preparing a semi-solid zinc-based alloy through electromagnetic stirring; carrying out casting after temperature drops to 550 DEG C; and carrying out water cooling or air cooling. Compared with the prior art, the invention has the following advantages: the fine-grained zinc-based alloy for the die has the following mechanical properties at normal temperature, i.e., sigma b of 492.6 MPa, delta s of 1.42% and HBR of 168; even at a high temperature of 200 DEG C, sigma b reaches 216 MPa and delta s reaches 26%, completely according with the requirement of a common injection die for the mechanical property sigma b of 120 to 150 MPa at the temperature of 200 DEG C.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and relates to a fine-grain zinc-based alloy for a mold, in particular to a preparation process for a fine-grain zinc-based alloy for a mold. Background technique [0002] The ternary alloy of zinc, aluminum and copper with zinc as the matrix, plus a small amount of magnesium is called zinc-based alloy, and the mold made of this material is called zinc-based alloy mold. Due to the good fluidity of the zinc-based alloy, the mold making is fast; the fine lines on the model can be directly reproduced and formed, which saves a lot of machining workload; the machining efficiency of the zinc-based alloy mold is high, the surface finishing performance is good, and the processing time is reduced. It is only 1 / 2 of steel; compared with mold steel materials, the mold-making cycle of zinc-based alloys can be shortened by 30%-40%; the cost of zinc-based alloy molds is generally 30%-40% lower than sim...

Claims

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Application Information

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IPC IPC(8): C22C18/04C22C18/02C22C1/03B22D1/00
Inventor 丁刚丁家伟耿德英张莹谢宗翰王爱华郭洪才印杰孙健张宁强颖怀郭长庆
Owner 江苏新亚特钢锻造有限公司
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