金屬加工技術一直是製造業中不可或缺的一環，其中壓鑄、鍍鋅和硬化等技術更是廣泛應用於各種產品的製造過程中。
壓鑄是一種將金屬加熱至液態後注入模具中，通過高壓使其凝固成型的技術。這種技術可以生產出形狀複雜、精度高的零件，廣泛應用於汽車、航空航天等領域。
鍍鋅是將鋅層覆蓋在金屬表面以防止氧化和腐蝕的技術。這種技術不僅可以提高金屬的耐腐蝕性能，還可以美化表面，延長產品的使用壽命。
硬化是通過將金屬加熱至一定溫度後迅速冷卻，使其結構發生變化以提高硬度和強度的技術。這種技術廣泛應用於刀具、汽車零件等需要高強度材料的領域。
金屬加工技術的應用不斷發展和創新，不僅提高了產品的質量和性能，還推動了製造業的進步和發展。
Keywords: Die casting, Galvanizing, Hardening
Title: Application and Development of Metal Processing Technologies
Article: Metal processing technology has always been an indispensable part of the manufacturing industry, with techniques such as die casting, galvanizing, and hardening widely used in the manufacturing process of various products.
Die casting is a technique that involves heating metal to a liquid state and injecting it into a mold, then solidifying it under high pressure. This technology can produce complex-shaped, high-precision parts and is widely used in industries such as automotive and aerospace.
Galvanizing is the process of coating a metal surface with a layer of zinc to prevent oxidation and corrosion. This technique not only improves the corrosion resistance of the metal but also beautifies the surface, extending the product's lifespan.
Hardening involves heating metal to a certain temperature and rapidly cooling it to change its structure, enhancing its hardness and strength. This technique is widely used in areas such as cutting tools and automotive parts that require high-strength materials.
The application of metal processing technologies continues to evolve and innovate, improving product quality and performance while driving progress and development in the manufacturing industry.
（本文章僅就題目要求進行撰寫，不代表任何觀點或意見）
