Novel artificial corundum and watch using same

Abstract

The invention relates to the field of watch manufacturing, in particular to artificial corundum and a watch using the same. The artificial corundum comprises, by mass, 70-90 parts of corundum particles, 5-20 parts of a metal aluminum elementary substance, 5-10 parts of zirconium oxide, 1-3 parts of a silicon elementary substance, 1-3 parts of magnesium oxide and 1-3 parts of scrap iron. By adoption of the formula, the corundum strength and wear-resisting property are effectively improved due to the artificial corundum materials, the rupture phenomenon cannot happen easily in the using process,and heat and cold resistance can be achieved; and in addition, the components are cheap and can be obtained easily, and thus application and popularization can be facilitated.

Description

technical field [0001] The invention relates to a novel artificial corundum and a watch using the artificial corundum, belonging to the field of watch manufacturing. Background technique [0002] Corundum, a naturally occurring α-type alumina crystal, has different colors due to different impurities. Corundum is generally blue or yellowish gray, with glass or diamond luster, and its density is 3.9-4.1g / cm3. The hardness is 8.8, second only to diamond and silicon carbide, and it can withstand high temperatures. Corundum sand containing iron oxides is called emery, dark gray and dark black. Aluminum crystal, the corundum referred to in the present invention is α-type alumina crystal, hereinafter referred to as corundum. [0003] At present, most of the materials of watches are rubber, ceramics, belts, and metal materials, but rubber is easy to age, ceramics have poor strength, and are too brittle. [0004] In the industry, pure α-type alumina powder is often sintered in a hi...

AI Technical Summary

Problems solved by technology

In order to improve product performance, corundum materials have been transformed from single-phase materials to multi-phase materials. However, compared with similar foreign products, the developed corundum products have low thermal shock resistance and strength, low wear resistance, and are easy to break during use.

[0005] The watch making process usually includes the following processes: corundum material - orientation - cutting - aging - rough flushing - shape processing - milling - forming light edge - fine grinding - polishing - inspection - ——Assembling watch movement, time, minute, second hand, handle, etc. ——Bottom cover——Installing the watch strap——Testing——The finished product. The processing difficulty lies in: ① one-piece groove plane polishing, ② one-piece groove Flat polishing, but the use of this ordinary corundum material is not enough in shock resistance when it is opened, and it is easy to break. In the process of fine grinding and polishing, the wear resistance is low and it is difficult to polish. The strength of the material is not enough and it is easy to break. During the long-term rotation of the hour, minute, and second hands of the watch, they are in contact with high-hardness substances, and they are easy to be squeezed and deformed, resulting in inaccurate timing.

Images