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Easy-cutting antimony-zinc alloy and preparation method of bar thereof

An aluminum alloy and easy-cutting technology, which is applied in the field of preparation of antimony zinc aluminum alloy and its bars, achieves the effects of good cutting performance, easy processing and improved machinability

Active Publication Date: 2012-12-19
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 antimony-zinc alloy and preparation method of bar thereof
  • Easy-cutting antimony-zinc alloy and preparation method of bar thereof
  • Easy-cutting antimony-zinc alloy and preparation method of bar thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 87.00wt% of zinc, 10.00wt% of aluminum and 3.00wt% of antimony were uniformly mixed, and a master alloy billet with a diameter of 170 mm was produced by semi-continuous casting. Then it is hot-extruded into a rod blank at a temperature of 300°C, and then a rod with a required diameter is made by a combined drawing method. After measurement, the tensile strength of the rod is 320 MPa, the elongation is 12%, and the hardness is HB=85. The bar is drilled into parts with a cam-type automatic lathe, and the chips are fragile, and the efficiency can reach 90% of that of C3604 lead brass rods; at the same time, the surface of the parts can be nickel-plated, chrome-plated, tin-plated and other surface treatments as required.

[0024] figure 1 It is the 500 times metallographic diagram of the master alloy billet in the state of hot extrusion at 300 °C. figure 1 The black structure in is the intermetallic compound phase AlSb. AlSb has an irregular shape and a micron-scale si...

Embodiment 2

[0029] 83.00wt% of zinc, 15.00wt% of aluminum and 2.00wt% of antimony are evenly mixed, the alloy is smelted by induction heating, and the alloy cast billet is made by die casting. Then the cast slab is extruded into a bar billet at a temperature of 200°C, and a zinc alloy bar is made by a crawler broaching machine. The measured tensile strength of the bar is 380Mpa, and the elongation is 15%. After polishing and straightening, electronic products are processed on CNC machine tools, and its processing efficiency can reach 85% of that of C3604 lead brass rods. The surface of the parts can be treated with nickel plating, chrome plating, tin plating, etc.

Embodiment 3

[0031] Mix 91.00wt% of zinc, 1.00wt% of aluminum, and 8.00wt% of antimony evenly, melt by induction heating, and use steel mold casting to obtain a master alloy billet, which is extruded into an alloy at 180°C The blank of the bar is passed through the multi-die wire drawing machine to the size before the finished product, and then the finished product is obtained after combined drawing reduction, straightening and polishing. The finished product is processed by a cam type automatic lathe, and the processing efficiency can reach 90% of that of C3604 lead brass of the same specification.

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Abstract

The invention relates to easy-cutting antimony-zinc alloy and a preparation method of a bar thereof. The easy-cutting antimony-zinc alloy is characterized by comprising the following components by weight percent: 0.5-15% of aluminum, 0.5-8% of antimony, the balance of zinc and unavoidable impurities. The bar can be prepared into an alloy casting blank by die casting, semi-continuous casting or full-continuous methods, and then the alloy casting blank is heat processed into a blank material at a constant temperature of 150-380 DEG C, and finally, the obtained blank material is drawn by cold processing or straight-line-stretched to obtain the easy-cutting antimony-zinc alloy bar. The cutting performance and efficiency of the antimony-zinc alloy bar are obviously higher than die casting zincalloy and close to a lead brass bar, the antimony-zinc alloy bar has the characteristics of no lead and cadmium, good environment-friendly properties, no magnetism, no sparking discharge and the like, easy processing, easy electroplating, and moderate mechanical properties, can be used as a substitute for a lead brass alloy bar, can be used as a basic raw material processed by meter lathes, automatic lathes and numerical control lathes and as a substitute for the easy-cutting copper alloy bar and die-casting zinc alloy.

Description

technical field [0001] The invention relates to a preparation method of an antimony-zinc aluminum alloy and a bar thereof. Background technique [0002] Non-ferrous metal rods are the basic raw materials for various metal parts. By means of instrument lathes, automatic lathes, CNC lathes, etc., non-ferrous metal bars are cut and processed, and parts of various sizes and shapes that people need can be obtained. The quality of alloy cutting performance has a very important effect on the cutting speed, surface finish and dimensional tolerance. [0003] Iron alloys, copper alloys, aluminum alloys, etc. all have free-cutting alloy bars that are widely used in different technical fields. Because zinc alloy has good environmental performance, no pollution, low melting point, good processing performance, low cost, energy saving, no electromagnetic waves and other excellent characteristics, it can be widely used in some fields to manufacture parts. [0004] Due to the low melting ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C18/04
Inventor 孙文声谢识才张明庄秀发张锦麟
Owner NINGBO POWERWAY ALLOY MATERIAL
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