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A kind of preparation method of lead-based layered composite material

A composite material and base layer technology, applied in the field of composite material processing, can solve the problems of difficult control, churning, splashing, low density of poured metal, etc., and achieve the effect of reducing environmental impact, improving working environment, and good feeding effect.

Active Publication Date: 2017-01-25
KUNMING HENDERA SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for lead-based composite materials, its particularity lies in the soft texture and low tensile strength of lead itself. Therefore, as far as lead-based composite materials are concerned, only rolling composite method, hot-pressing diffusion method and gravity The casting compound method can realize the preparation of lead-based composite materials, but the rolling compound method has high requirements for temperature and time control, which is not easy to control in industrial production, and often requires follow-up treatment after rolling, and deformation during rolling passes When it is larger, the power of the rolling mill is required to be larger, and the interfacial bonding rate of the layered composite material is low, and the highest bonding rate is 90%; the production efficiency of the hot-pressed diffusion method is low because it takes a lot of time to realize the matrix and reinforcement. The atomic diffusion between the two bodies, so as to realize the metallurgical combination between the two, so it is not suitable for large-scale industrial continuous production; the gravity pouring composite method, which mainly relies on the metal itself to complete the pouring, will appear during the pouring process. Phenomena, in the subsequent metal solidification process, there will be a large number of unpredictable defects and low density of cast metal, resulting in low surface density of finished products (85%~90%), and this method needs to melt a large amount of lead, Make lead more volatile and pollute the working environment

Method used

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  • A kind of preparation method of lead-based layered composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Steel (thickness: 2mm) is used as the reinforcement material, which is surface-treated and plated with Sn, Sb, and In alloy components, the thickness of which is 0.1mm, and the plated steel plate is preheated (preheating temperature 150°C), and the surface is polished, the mold is heated (210°C), the liquid pressure is 300 mPa, the liquid rise time is 2 seconds, the filling pressure is 2800 mPa, and the filling time is 1 seconds, the boost pressure is 3500 mPa, the boost time is 5 seconds, the crystallization time is 180 seconds, the cooling time is 180 seconds, the lead liquid pouring temperature is 450°C, and the forming mold temperature of the composite plate is 250°C. The pouring and cooling of the low-pressure casting results in the lead-based matrix composite material.

[0022] The lead-based layered composite material that present embodiment obtains is as figure 1 As shown, the filling quality is high, and the interfacial bonding rate of the layered composite is...

Embodiment 2

[0024] Steel (thickness: 3mm) reinforcement material, which has been surface-treated and coated with alloy components of Sn, Sb, and In on the surface, with a thickness of 0.2mm, preheats the coated steel plate (the preheating temperature is 155°C), and the surface is polished, the mold is heated (220°C), the liquid liter pressure is 800 mPa, the liquid liter time is 3 seconds, the filling pressure is 3500 mPa, and the filling time is 5 seconds , the boosting pressure is 4000 mPa, the boosting time is 20 seconds, the crystallization time is 300 seconds, the cooling time is 300 seconds, the lead liquid pouring temperature is 480°C, and the forming mold temperature of the composite plate is 260°C. The pouring of the cast and cooling results in a lead-based matrix composite.

[0025] The filling quality of the lead-based layered composite material obtained in this example is high, and the interfacial bonding rate of the layered composite material is 99%.

Embodiment 3

[0027] Using steel (thickness 4mm) reinforcement material, which has been surface treated and coated with alloy components of Sn, Sb and In on the surface, the thickness is 0.3mm, and the plated steel plate is preheated (the preheating temperature is 158°C), and polish the surface, heat the mold (230°C), use a liquid liter pressure of 500 mPa, a liquid liter time of 3 seconds, a filling pressure of 3000 mPa, and a filling time of 2 seconds , the boosting pressure is 3700 mPa, the boosting time is 17 seconds, the crystallization time is 240 seconds, the cooling time is 250 seconds, the lead liquid pouring temperature is 470°C, and the forming mold temperature of the composite plate is 260°C. The pouring of the cast and cooling results in a lead-based matrix composite.

[0028] The filling quality of the lead-based layered composite material obtained in this example is high, and the interfacial bonding rate of the layered composite material is 98%.

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Abstract

The invention discloses a method for preparing a lead-base layer-shaped composite material and belongs to the technical field of preparing composite materials. Metal sheets of different specifications are used as inner core reinforcing bodies, a low-pressure casting method is used for enabling lead and alloy materials of the lead to wrap the metal sheets with inner cores of different specifications, and therefore the metallurgy-combined lead-base layer-shaped composite material is prepared. The lead-base layer-shaped composite material produced through a low-pressure casting technology is good in mold filling and feeding effect, the material organization of the produced lead-base composite material is compact, the mechanical property of the product is high, and the combining rate of compound interface layers can reach more than 95 percent. Compared with a traditional lead-base composite material preparing method, one-time forming can be achieved through the low-pressure casting method, the technological process is shortened, the production efficiency of the product is greatly improved, and labor intensity is lowered.

Description

technical field [0001] The invention relates to a preparation process of a lead-based composite material, belonging to the technical field of composite material processing. Background technique [0002] At present, lead is widely used in all walks of life with its own advantages, such as electrode reaction, shielding materials and other fields are still dominated by lead, but the use performance problems caused by the defects of lead itself are increasingly prominent, such as its own large proportion , low strength, high internal resistance and other defects have restricted the further application of lead. Therefore, while making full use of the advantages of lead itself, how to meet the application conditions and improve its comprehensive performance (strength, conductivity) has become the focus of research. . However, advances in composite material technology provide new technical and theoretical basis for utilizing the advantages of lead and reducing its disadvantages. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D19/02B22D19/08B22D19/16B22D18/04
Inventor 竺培显韩朝辉周生刚曹勇朱坤亮张喆范农杰王福
Owner KUNMING HENDERA SCI & TECH
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