PT Journal
AU Prucha, V
   Kriz, A
   Zdansky, O
   Vnoucek, M
TI Analysis of Fractured Weldment of Hadfield Steel
SO Manufacturing Technology Journal
PY 2019
BP 308
EP 313
VL 19
IS 2
DI 10.21062/ujep/288.2019/a/1213-2489/MT/19/2/308
DE Hadfield steel; welding of Hadfield steel; etching of Hadfield steel; microstructure of Hadfield steel
AB This contribution is divided into two sections. The first one deals with identifying the cause of fracture in a ring, which fractured after weld surfacing. Optical and scanning electron microscopy and hardness testing were employed. Chemical composition was determined using the GDOES and EDX methods. Although weld surfacing has led to fracture in the base material, the actual problem was in the inadequate microstructure of the base material. Microscopic analysis revealed that it was heterogeneous. It contained distinctive segregation bands with bands of complex carbides and pearlite colonies, which are undesirable. The microstructure of this steel should be fully austenitic. In order to remove the heterogeneities, solution annealing was proposed and carried out successfully. The second section of this paper explores the options for revealing the microstructure of Hadfield steel. Etching reagents from the literature and authors' experience were put to test.
ER