The study of casting defects in steel 35HGSL

Abstract

In this research work the classification of defects of castings obtained by electric arc smelting is considered. Of particular interest to researchers is the rock-like and naphthalene fractures. A stone-like fracture is characterized by a clearly defined uniform surface over which the fracture occurs. Grain boundaries are partially soluble in the austenite phase, consisting of fine individual particles or films formed from molten eutectics. It is also worth noting that most often the stone-like fracture is observed at the grain boundaries.

Study on Defect Reduction in Casting of Ni-Cr alloy (UNS N06003)

“…The formation of compounds is followed by solidification stage in casting. During solidification, such compounds reside on the grain boundaries due to their limited solubility in matrix [26]. Proper selection and addition of charging materials can resolve such issues [17,27].…”

“…These defects are created as isolated entities and stay in agglomerated or isolated form based on either operating condition. The presence of non-metallic inclusions, inconsistency in geometry [26], blow holes [28,29], deviations generated within crystallographic orientations [30], pores [31]etc. greatly cause defects.…”

A Brief Study on Defect Reduction of Cast Fe-Ni-Cr Alloy (UNS N08120) for Petrochemical Industry

“…Casting defects are caused due to direct or indirect factors. The commonly observed defects that get generated during the casting are porosity, blow-holes [19], geometric inconsistency, surface defects, non-metallic inclusions [20] and deviation of crystallographic orientation and stray grains [21].…”

“…form carbides, sulphides, phosphides and nitrides having limited solubility in the alloy matrix and thus remain at the grain boundaries. Though, these elements are essential for elimination of several problems in various manufacturing operations but their content needs to be maintained [20].…”