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Zinc aluminum based alloy extruded tube for delay element of industrial delay detonator and preparation method of zinc aluminum based alloy extruded tube

A technology of delayed detonator and delayed body, applied in the direction of detonator, offensive equipment, etc., can solve the problems of inability to meet needs, serious heat, difficult to cut, etc., and achieve significant social and economic benefits, short production process flow, and large market capacity. Effect

Active Publication Date: 2015-06-17
福州博德新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, lead-antimony alloy extension tubes are widely used in the civil explosive industry, but there is serious pollution, and there is an urgent need for an environmentally friendly, high plasticity and low hardness alloy tube to replace
[0003] In the article "Research on Lead-free Detonator System" in the journal "Blasting Equipment" Volume 38, Issue 3, some attempts were made in this field, and the aluminum extension body was used, but the heat was severe, it was not easy to cut, and it could not meet the needs.
Chinese Patent Announcement No. CN 102409275 A, dated April 11, 2012, titled "Preparation Method of Ultra-Fine Grain Lead-Free Delayed Body for Detonator", discloses a method using casting, extrusion, rolling and The Zn-Al alloy tube is prepared by machining method, and then drawn or rolled into a fine extension body, but its process flow is complicated, and its related literature (for the dissertation "Zn-22 wt.%Al alloy" of the patent applicant's research group Feasibility application research in the detonator extension body") work shows that during the implementation of this technology, the process and equipment are more difficult, and the existing equipment and technology can only draw a thick tube with a diameter of 18mm to a diameter of 14mm

Method used

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  • Zinc aluminum based alloy extruded tube for delay element of industrial delay detonator and preparation method of zinc aluminum based alloy extruded tube
  • Zinc aluminum based alloy extruded tube for delay element of industrial delay detonator and preparation method of zinc aluminum based alloy extruded tube
  • Zinc aluminum based alloy extruded tube for delay element of industrial delay detonator and preparation method of zinc aluminum based alloy extruded tube

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Experimental program
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Effect test

Embodiment 1

[0021] Prepare a zinc-aluminum-based alloy extruded tube with a mass percentage of zinc and aluminum of 78%:22% (± 1%), and a mass percentage of rare earth and other alloying elements of 0.25% for environmental protection, high plasticity and low hardness for industrial delay detonator extension bodies .

[0022] 1. For the preparation of alloy rods, the relative error of the ingredients does not exceed 0.5%. The material of the casting mold is hot work die steel or graphite, or the alloy liquid is injected into the distribution plate, and the alloy rods are obtained by continuous crystallization and cooling through the casting crystallizer.

[0023] 2. Saw the alloy bar into a 400mm alloy bar with a sawing machine.

[0024] 3. Carry out long-time homogenization annealing, quenching and annealing treatment on the alloy rod. The detailed parameters are as follows: homogenize the alloy rod at 360°C for 36-72 hours, quench it by immersing it in 10-25°C water immediately after it...

Embodiment 2

[0031] like Figure 1~6 As shown, the preparation of a zinc-aluminum mass percentage of 78%: 22% (± 1%), the addition of rare earth and other alloying elements mass percentage of 0.80% of the environmental protection, high plasticity, low hardness, zinc-aluminum base alloy for industrial delay detonator extension body Squeeze the tube.

[0032] 1. For the preparation of alloy rods, the relative error of the ingredients does not exceed 0.5%. The casting mold is made of hot work die steel or graphite, or the alloy liquid is injected into the casting crystallizer, and the alloy rods are obtained by continuous crystallization and cooling.

[0033] 2. The alloy bar is formed into an extruded bar blank by forging or extruding

[0034] 3. Saw the extruded rod blank into a 400mm long alloy rod with a sawing machine.

[0035] 4. Carry out long-term homogenization annealing, quenching and annealing treatment on the alloy rod. The detailed parameters of the heat treatment are as follo...

Embodiment 3

[0042] An environmentally friendly, high-plasticity, low-hardness industrial delay detonator extension body zinc-aluminum-based alloy extruded tube with a mass percentage of zinc and aluminum of 81%:19% and an addition of rare earth and other alloy elements of 0.02% by mass is prepared.

[0043] 1. For the preparation of alloy rods, the relative error of ingredients does not exceed 0.5%. The material of the casting mold is hot work die steel or graphite, or the alloy liquid is injected into the distribution plate and casting crystallizer, and the alloy rods are obtained through continuous crystallization and cooling.

[0044] 2. The alloy bar is sawed into a 400mm long alloy bar with a sawing machine.

[0045] 3. Carry out long-time homogenization annealing, quenching and annealing treatment on the alloy rod. The detailed parameters of the heat treatment are as follows: the alloy rod is subjected to 36-72 hours, 360°C homogenization heat treatment, the alloy rod is immediately...

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Abstract

The invention relates to a zinc aluminum based alloy extruded tube for a delay element of an industrial delay detonator and a preparation method of the zinc aluminum based alloy extruded tube. The preparation method comprises the steps as follows: firstly, a zinc aluminum based alloy is machined into an alloy bar by a pig casting machine, the alloy bar is subjected to heat treatment, and a surface oxidation layer is removed; secondly, the alloy bar is machined into an alloy tube by an extruding machine; thirdly, the alloy tube is straightened; and fourthly, the straightened tube is subjected to heat treatment to obtain the environment-friendly zinc aluminum based alloy extruded tube with high plasticity and low hardness, the elongation rate at the room temperature is not lower than 150%, and the hardness is not higher than 45 HV. The preparation method is simple, the rate of finished products is high, and the cost is low, and the preparation method is suitable for industrial mass production; the prepared zinc aluminum based alloy extruded tube is environment-friendly, high in plasticity and low in hardness, can replace a lead-antimony alloy tube with serious pollution and toxicity in the civil explosive industry, and can be further used for preparing a composite delay element tube through drawing for industrial delay detonator assembly; and the extruded tube also can replace part of expensive copper alloy tubes, and the application prospect is wide.

Description

technical field [0001] The invention relates to a zinc-aluminum base alloy extruded tube for an industrial delayed detonator delay body and a preparation method thereof. Background technique [0002] The industrial time-delay detonator is a high-tech product in the civil explosive industry. It needs to use a low-hardness and high-plasticity crude alloy tube in the process of forming the delay body. The thick alloy tube is filled with delay drug powder, and through a multi-pass drawing process, a uniform and dense delay body composite tube is prepared. In the existing delay body technology, the toxic heavy metal lead-antimony alloy tube is widely used. Lead-antimony alloy pipes are seriously polluted and toxic, whether they are produced, used, or left in mines or soil, and are extremely harmful. With the strengthening of environmental protection awareness at home and abroad and the implementation of environmental protection laws and regulations, toxic heavy metal pollutants...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C18/04C22F1/16C21D8/10C06C7/02
Inventor 吴波周泽友钭舒适李锋宝方圆
Owner 福州博德新材料科技有限公司