Preparation method and application of alloy adhesive formula

Abstract

The invention relates to an alloy cement formula. The alloy cement formula comprises the following components by mass percent: 87-92 percent of lead, 7-12 percent of antimony, 0.1-0.4 percent of arsenic and 0.5-3 percent of copper, wherein the content of impurities, such as aluminum, silicon and iron, in the alloy cement formula is smaller than 0.5 percent. The invention further discloses a preparation method of the alloy cement and an application of the alloy cementing agent for insulator preparation, The process method is simple, the operation is convenient, and the prepared alloy cement has superior performance, has the advantages of shorter binding period, high binding production efficiency, small land occupation, wider allowable temperature range, good stability and ductility, low probability of size change and stronger harmful stress resistance, and can not cause too much stress to part of a fragile porcelain to lead the porcelain to damage.

Description

technical field [0001] The invention relates to an alloy adhesive formula and its preparation method and application, in particular to an alloy adhesive formula for power transmission and transformation line insulators or extreme environment insulators, its preparation method and its application, and belongs to the technical field of metal material synthesis. Background technique [0002] Insulators are generally shaped insulating materials fitted with metallic attachments. It is mainly composed of insulating parts, metal accessories and adhesives in structure. The glue glues the insulating part and the metal accessories into a whole, and the glue plays the role of tissue connection of the whole structure. [0003] Domestic adhesives are mainly prepared with Portland cement. Due to the low cost of cement materials, the adhesive prepared by it has a certain strength, so this material and its glue-binding process have been used in China. After years of practical application,...

AI Technical Summary

Problems solved by technology

Due to the low cost of cement materials, the adhesive prepared by it has a certain strength, so this material and its glue-binding process have been used in China. After years of practical application, we found that this material has the following problems: 1. Long glue binding cycle and low efficiency: The cement glue binding process has to go through three stages of hydration, coagulation and hardening. The whole glue binding process needs a long curing time, usually 4 to 5 days; 2. The cement is easy to loosen : The cement adhesive has 15~30% moisture in the preparation process, and in the curing process of the cement, the drying shrinkage of the cement tends to cause cement loosening, which leads to the loosening of the steel cap of the insulator, reduces the overall mechanical properties of the insulator, and leads to unqualified products ; 3. Metal accessories are easy to corrode: the cement adhesive is easy to damage the galvanized layer of the metal accessories during the glue-mounting process, thereby causing corrosion and reducing the corrosion resistance of the metal accessories; During the process, due to the existence of certain components (calcium oxide, etc.), harmful stresses are generated inside the cement adhesive, resulting in a decrease in the overall strength of the cement adhesive, which affects the decline in the strength of the entire insulator; 5. The difference in thermal expansion coefficient of cement and metal accessories is too large ( Thermal expansion coefficient of metal accessories 1.2×10 -7 / ℃, thermal expansion coefficient of cement adhesive 6~7×10 -6 / °C), so when the product encounters a large temperature difference during the glue assembly process, the different degrees of expansion and contraction of the two materials will bring internal stress, which will cause the insulator to change continuously, resulting in poor product reliability.