Effect of Preheat Temperature on Weldability of Martensitic Stainless Steel

被引：11
|
作者：
Kumar, Sanjeev [1 ]
Chaudhari, G. P. [1 ,2 ]
Nath, S. K. [1 ]
Basu, B. [2 ]
机构：
[1] Indian Inst Technol, Dept Met & Mat Engn, Roorkee 247667, Uttar Pradesh, India
[2] NMRL, Bombay, Maharashtra, India
来源：
MATERIALS AND MANUFACTURING PROCESSES | 2012年 / 27卷 / 12期
关键词：
Alloys; Characterization; Martensite; Metallography microstructure; Phases; Stainless; Weldability; Welding; ARC; SIMULATION; DESIGN;
D O I：
10.1080/10426914.2012.700150
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
13/4 low carbon martensitic stainless steel is conventionally used for turbine blades in hydroelectric power plants. Due to silt erosion and cavitation, heavy damage often occurs in this material. In order to enhance the life of hydro-turbine components, repair welding is needed. Selection of proper welding parameters during repair welding is therefore essential in order to control any possible deterioration of its mechanical properties. This work deals with heat affected zone (HAZ) simulation of 13/4 martensitic stainless steel using a thermomechanical simulator, Gleeble (R) 3800. Assessment of Charpy impact toughness, tensile properties, and hardness of HAZ simulated specimens is done. Peak temperatures of 1,000 degrees C, 1,200 degrees C, and 1,325 degrees C and preheat temperatures of 30 degrees C and 121 degrees C are used. High impact toughness (52.8 J) and ductility (19.3%) is observed in steel specimens simulated with peak temperature of 1,000 degrees C along with 121 degrees C preheat temperature. The observed results are explained based on the microstructural changes resulting from different welding parameters.
引用
收藏
页码：1382 / 1386
页数：5
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