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Deformation zinc alloy, as well as manufacturing method and application thereof

A zinc alloy and intermetallic compound technology, applied in the field of deformed zinc alloy and its preparation, can solve problems such as lack of copper resources, and achieve the effects of increasing creep resistance, increasing strength, and reducing melting point

Active Publication Date: 2012-07-18
NINGBO POWERWAY ALLOY MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The first technical problem to be solved by the present invention is to provide a deformed zinc alloy to replace lead brass at a lower cost for the manufacture of nuts and nuts for the air-conditioning industry in view of the current state of the art, and to solve the problem of lack of copper resources

Method used

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  • Deformation zinc alloy, as well as manufacturing method and application thereof
  • Deformation zinc alloy, as well as manufacturing method and application thereof
  • Deformation zinc alloy, as well as manufacturing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The melting composition is Mn: 0.5%, Cu: 2.0%, Co: 0.1%, and the balance of Zn, which is added in the form of pure zinc, zinc-copper master alloy, copper-manganese master alloy, and cobalt wire, using a reflection melting furnace with a capacity of 80 kg After being completely melted at 500°C, a die with a diameter of 170 mm is used to cast into a slab. After the cast slab has been flattened and wagoned, it is extruded into a S23.2mm hexagonal billet on a 1250-ton extrusion machine with an extrusion speed of 1.5mm / s, an extrusion temperature of 180°C, and an extrusion ratio of 42; Stretch into a finished bar of S22.0mm, and the pass processing rate of stretching is 5.0%.

[0054] After testing, it is known that the tensile strength of the finished rod is 400MPa, the elongation is 16%, and the Vickers hardness is Hv105.

[0055] The metallographic structure of the finished product was observed by scanning electron microscope, and combined with the composition of the all...

Embodiment 2

[0064]The melting composition is Mn0.01%, Cu: 9.5%, Co: 0.02% and the balance of Zn, which are added in the form of pure zinc, zinc-copper, copper-manganese master alloy, and cobalt wire into a 50-kg medium-frequency melting furnace. After completely melting at 550°C, use a hard mold with a diameter of 90mm to make a billet. After peeling the billet, extrude it into a φ27.5mm round billet on an 800T extruder at a speed of 0.1mm / s, the extrusion temperature is 150°C, and the extrusion ratio is 10; and then stretched into a finished rod with a diameter of φ19.0mm, the processing rate of each stretch is 8.6%, and the total processing rate is 52%. After testing, the finished bar has a tensile strength of 490MPa, an elongation of 10%, and a Vickers hardness of Hv135.

[0065] The metallographic structure of the finished product was observed by scanning electron microscope, and combined with the composition of the alloy, it was determined that Zn 4 The volume content of Cu phase i...

Embodiment 3

[0068] The melting composition is Mn: 0.1%, Cu: 8.0%, Co: 0.05%, and the balance of Zn, which is added to the 80 kg capacity intermediate frequency melting furnace in the form of pure zinc, zinc-copper master alloy, copper-manganese master alloy and cobalt wire , after being completely melted at 600°C, it is cast into a slab with a hard mold with a diameter of 170 mm. After the billet has been flattened and wagoned, it is extruded into a round billet of φ15.0mm on a 1250-ton extrusion machine at an extrusion speed of 3.0mm / s, an extrusion temperature of 300°C, and an extrusion ratio of 128; Stretching to φ12.5mm, the pass processing rate of stretching is 8.2%, and the total processing rate is 30%. Get the finished coil line. After testing, the coil wire has a tensile strength of 475MPa, an elongation of 12%, and a Vickers hardness of Hv125.

[0069] The metallographic structure of the finished product was observed by scanning electron microscope, and combined with the compos...

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Abstract

The invention relates to a deformation zinc alloy, as well as a preparation method and a use thereof. The deformation zinc alloy comprises 2.0-9.5% of Cu, 0.01-0.5% of Mn, 0-0.1% of Co and the balance of zinc and inevitable impurity elements, wherein the total amount of the inevitable impurity elements is less than 0.01. The microstructure of the zinc alloy mainly comprises a zinc matrix primary phase and intermetallic compounds dispersed in the primary phase, wherein the primary phase is of an HCP (hexagonal close-packed) structure, and the intermetallic compounds are of small Zn4Cu and Zn9Mn; the volume content of the Zn4Cu phase is 5%-55%, the volume content of the Zn9Mn phase is 0.1%-5%, and the balance is of the primary phase; and the average grain size of the primary phase is 15-35 mu m, and the average grain size of the intermetallic compounds is 5-15 mu m. The alloy can be produced into screw nuts and screw caps for air conditioners for replacing traditional brass and further solving the problem of being short of brass resources through post-processing technologies, such as melting-casting, extrusion, drawing and the like under certain process conditions.

Description

technical field [0001] The invention relates to a deformed zinc alloy and a preparation method thereof, in particular to a zinc-copper-based deformed zinc alloy capable of manufacturing nuts and nuts used in the air-conditioning industry and a manufacturing method thereof. Background technique [0002] Air conditioners are widely used household and office appliances, mainly composed of refrigerants, compressors, pipes and various valves. The deformed zinc alloy of the present invention is mainly used to replace traditional copper alloys and to manufacture various hexagonal nuts and nuts used in air conditioners. These hexagonal nuts and nuts are mainly used for sealing and connecting shut-off valves and four-way valves. [0003] Traditional air conditioner nuts and nuts are made of lead brass by turning, hot stamping and other methods. Due to the shortage of copper resources, the price of copper has risen with the increase of usage. It is an urgent need for the air-conditi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C18/02C22C1/02C22F1/16C21D8/00
CPCC22C18/02C22F1/165C22C1/02C22F1/16
Inventor 孙文声余惺郭俊李振宇张明谢识才
Owner NINGBO POWERWAY ALLOY MATERIAL
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