Easy-cutting zinc-copper-base wrought zinc alloy and preparation method thereof

A zinc alloy, easy-cutting technology, applied in the field of zinc-copper-based deformed zinc alloy and its preparation, to achieve moderate mechanical properties, good cutting performance, and improve the strength of the alloy

Active Publication Date: 2011-08-24
NINGBO POWERWAY ALLOY MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

None of the above patents involves the machinability of zinc alloys and their rods

Method used

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  • Easy-cutting zinc-copper-base wrought zinc alloy and preparation method thereof
  • Easy-cutting zinc-copper-base wrought zinc alloy and preparation method thereof
  • Easy-cutting zinc-copper-base wrought zinc alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The weight composition of this zinc alloy is as follows:

[0019]

[0020] The titanium element is added in the form of a copper-titanium master alloy during alloy batching, the weight content of titanium in the copper-titanium master alloy is 30%, and the balance is copper; the remaining copper in the zinc alloy is made up with pure copper; bismuth and zinc According to the content of alloying elements, it is added in the form of pure metal.

[0021] The melting and casting process of the alloy adopts a power frequency furnace, and the master alloy blank with a diameter of 170 mm is made by semi-continuous casting, which is hot-extruded into a bar blank at a temperature of 380 ° C, and the combined drawing method is used to make the blank. rods of required diameter.

[0022] The tensile strength of the finished rod is 385MPa, the elongation is 12%, and the hardness is Hv=110.

[0023] The cam-type automatic lathe is used to drill holes to process the finished bar ...

Embodiment 2

[0025] The weight composition of this zinc alloy is as follows:

[0026]

[0027] The titanium element is added in the form of a copper-titanium master alloy during alloy batching, the weight content of titanium in the copper-titanium master alloy is 25%, and the balance is copper; the remaining copper in the zinc alloy is made up with pure copper; bismuth and zinc According to the content of alloying elements, it is added in the form of pure metal.

[0028] The alloy is smelted by induction heating, and the alloy ingot is made by die casting. It is extruded into a bar blank at a temperature of 240°C, and is made into a zinc alloy bar with a crawler broaching machine. After polishing and straightening, the electronic product is processed on a CNC machine tool.

[0029] The tensile strength of the bar product is 285Mpa, and the elongation is 15%. Hardness Hv=93.

[0030] For parts with the same specifications, the machining efficiency of CNC machine tools can reach 85% of...

Embodiment 3

[0032] The weight composition of this zinc alloy is as follows:

[0033]

[0034] The titanium element is added in the form of a copper-titanium master alloy during the alloy batching, the weight content of titanium in the copper-titanium master alloy is 31%, and the balance is copper; the remaining copper in the zinc alloy is made up with pure copper; bismuth and zinc According to the content of alloying elements, it is added in the form of pure metal.

[0035] It is smelted by induction heating, and the master alloy ingot is obtained by die casting method, which is extruded into a billet of alloy rod at 180°C, passed through a multi-die wire drawing machine to the size before the finished product, and then combined drawing Reduced diameter, straightened, polished to finished product. In the dry processing of the cam type automatic lathe, the processing efficiency can reach 85% of the same specification of C3604 lead brass.

[0036] Its cutting performance comparison wit...

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Abstract

The invention relates to an easy-cutting zinc-copper-base wrought zinc alloy and a preparation method thereof. The easy-cutting zinc-copper-base wrought zinc alloy is characterized by comprising the following components in percentage by weight: 0.5-10% of copper, 0.1-3.5% of bismuth, 0.001-0.1% of titanium, at most 0.01% of inevitable impurity and the balance of zinc. The alloy fusion casting technique comprises the following steps: smelting in a line frequency furnace, intermediate frequency or reverberatory furnace, and carrying out continuous casting or metal mold casting to obtain a casting blank; and carrying out hot extrusion at 180-400 DEG C, and finally carrying out cold drawing to obtain various sizes of rods, wires and section products. The obtained products can be used in the fields of automatic lathes, drill presses, instrument lathes and the like. Compared with the prior art, the alloy provided by the invention has the characteristics of favorable cutting property, moderate mechanical properties and the like, and is easy for processing and electroplating.

Description

technical field [0001] The invention relates to the field of zinc alloys, in particular to an easy-cut zinc-copper-based deformed zinc alloy and a preparation method thereof. Background technique [0002] Machinability refers to how easy it is for a metal material to become a qualified workpiece after being cut by a tool. The machinability is usually measured by the surface roughness of the processed workpiece, the allowable cutting speed and the degree of wear of the tool. It is different from the metal material. It is related to the chemical composition, mechanical properties, thermal conductivity and work hardening degree and other factors. Usually, the hardness and toughness are used as the rough judgment of the machinability. Generally speaking, the higher the hardness of the metal material, the more difficult it is to cut. Although the hardness is not high, it has great toughness and is difficult to cut. Different metallographic structures and different hardnesses hav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C18/02C22C1/03
CPCB22D11/001C22C18/02
Inventor 孙文声张锦林董乐军谢全文张明
Owner NINGBO POWERWAY ALLOY MATERIAL
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