Bearing hot brittle failure

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Bearing hot brittle failure

Source: China Bearing Network Time: 2018-06-05
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The bearing data is rich in a few low-melting components. When the bearing operating temperature exceeds the melting point of the component; the bearing alloy is composed of a solid state matrix and a molten low-melting metal. The low-melting liquid metal is mesh-like. Around the grain boundary of solid metal. Under the effect of tensile, tortuous, and shear stress; the melting low melting point arrangement between the crystals is immediately kneaded and dispersed along the grain boundary; the base metal is not plastically deformed a little. In the case of crystal cracking; exhibits low plasticity; this brittle damage is called hot brittle; the temperature at which the low melting point of the alloy is melted at the beginning is called the hot brittle temperature. When the hot brittle appearance occurs; the alloy layer is formed from the steel back. Falling down; thus this failure mode is easily identifiable. Hot brittle failure is a rapid development of damage; it can cause mechanical catastrophic damage; so it is necessary to pay attention.
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