A Study on the Intergranular Characteristics of Austenite Stainless Steel Pipe Heated Low Temperature by Oxygen Flame

摘要

General carbon steel and alloy steel is not easily affected by flame bending. But the characteristic of material in stainless steels is affected by flame bending temperature and holing time. Austenite stainless steel is superior to other materials in corrosion resistance, but in materials of high carbon grade, if the stainless steel maintain the any temperature range, extraction of chrome carbide along the granular Boundary owing to combination of carbon and chrome and the corrosion resistance of Stainless steel would be lost because chrome content of adjacent area is dropped below 12%. Therefore, the characteristic of material is dropped remarkably because cracks for residual stress of thermal strain occurred compositively. In this paper, we analyzed the austenite stainless steel material character after heating low temperature boundary of sensitization, by torch and air cooling. From the study result, we can confirm that the mechanical character and corrosion resistance of austenite stainless steel after flaming bending was not changed.