Everyone knows that landscape boulders have many advantages, so many urban landscape boulders are made of stone carving materials. So how much do you know about the material content of landscape boulders. Next, the landscape boulders manufacturer will talk about the material content of the landscape boulders.
Let`s first understand what stone carving is. Generally speaking, steel that does not rust is called stone carving. However, in an academic sense, it is resistant to weak corrosive media such as air, steam, and water and chemically corrosive media such as acids, alkalis, and salts. Corroded steel. Also known as stainless acid-resistant steel. In practical applications, steel that is resistant to corrosion by weakly corrosive media is often called
stone sculpture, while steel that is resistant to corrosion by chemical media is called acid-resistant steel.
Due to the difference in chemical composition between the two, the former is not resistant to corrosion by chemical media, while the latter is generally stainless. The corrosion resistance of stone sculpture depends on the alloying elements contained in the steel. Chromium is the basic element that makes stone sculpture corrosion resistant. When the chromium content in steel reaches about 12%, chromium interacts with the oxygen in the corrosive medium to form a thin oxide film (self-passivation film) on the surface of the steel. , which can prevent further corrosion of the steel matrix. In addition to chromium, commonly used alloy elements include nickel, molybdenum, titanium, niobium, copper, nitrogen, etc. to meet the requirements for the structure and performance of stone sculpture for various purposes.
① Ferrite stone sculpture. Contains 12% to 30% chromium. Its corrosion resistance, toughness and weldability increase with the increase of chromium content, and its chloride stress corrosion resistance is better than other types of stone sculpture.
②Stone carving. It contains more than 18% chromium, and also contains about 8% nickel and a small amount of molybdenum, titanium, nitrogen and other elements. It has good comprehensive performance and can withstand corrosion from various media.
③ Ferrite dual-phase stone sculpture. It has the advantages of both austenitic and ferritic stone sculpture and has super plasticity.
④Martensitic stone carving. High strength, but poor plasticity and weldability.
