The Heat Treatment Of Chrome Hollow Bar
Chrome hollow bar also called chrome hollow rod/shaft or chrome tubing in many countries. chrome hollow bars are made of cold drawn seamless tubes or hollowed bars, by grinding and precision polishing on the outside diameter and then chrome plated to a certain thickness on the OD. Chrome hollow bar and chrome solid bar both very popular components for producing hydraulic cylinder . Heat Treatment Of Chrome Hollow Bar 1.Q+T(Quenched+Tempered) Quenching and tempering refers to the hardening (Quenching) of hollow rod materials at temperatures from 800 — 1,100 °C with a subsequent re-heating (Tempering) at temperatures from 540 — 680 °C. Hardening is a heat treatment process that comprises of austenitizing and rapid cooling. On account of the associated microstructure transformation during the cooling process, the chrome hollow steel rod is hard but also brittle. The subsequent high tempering temperature leads to an increased yield and tensile strength as ...