slide bearing-Bearing steel refining slag metallurgical performance analysis

High quality beaslide bearingring steel requiring high purity and homogeneous， i。e。， less impurity element and the non-metallic inclusions， fine and uniform distribution of carbides。 Refining slag with oxygen， desulfurization， to mixed effect， by its nature directly affects the LF refining process metallurgical results。 Oxygen， sulfur， when the value of a basic reducing slag in close contact with the liquid steel， the liquid steel actual oxygen， sulfur is greater than the value of the balance with the slag， the molten steel in the diffusion of oxygen and sulfur in the slag； CaO slag refining ， Al2O3 and other ingredients can be combined with Si， Al， Mn， etc。 deoxidation product into a low-melting compound， thereby reducing the activity of deoxidation products， enhance deoxygenation； oxides are due slag refining， the interfacial tension between the oxide small， easy to combine into a low melting point compounds， and the interfacial tension between the liquid steel and deoxygenated product is greater than the interfacial tension between slag and deoxidation products， refining slag deoxidation products can be absorbed， making the product easy to exclude from deoxygenated liquid steel。 Further， after the formation of foamed slag refining slag melt， the slag layer covering the molten steel， which can effectively prevent gas inhalation， and is conducive submerged operation， reduce the ladle lining arc and ladle cover damages to improve thermal efficiency。 Therefore， the study refining slag composition changes and their impact on the steel cleanliness of LF refining into full play the role of great significance。

To inclusions in bearing steel control， we must first inclusions in steel type， topography qualitative analysis。 According to the refining process known: There may sulfide inclusions in steel Class A， Class B alumina inclusions， Class C and calcium aluminate spinel composite inclusions and inclusions such as titanium nitride。 Since the whole process by precipitation deoxy， adsorption slag deoxidation products (mainly aluminum) is particularly important， stirred by argon weak dynamic conditions can be improved by means of inclusions float， but if the slag inclusions performance itself absorbs well， making the inclusions can not be completely separated from the molten steel will deteriorate the mechanical properties of bearing steel。 Therefore， the composition of refining slag， nature directly affect the performance of bearing steel。 In this study， a systematic discussion of the process of refining slag into the slag slag formation and composition of the influence of the law， and the alkalinity and desulfurization slag refining system to explorePlastic bearing， gain the ability to effectively remove oxides of sulfur and steel slag refining slag Department。