Datong Hydraulic

 AISI4130 hollow bar is made of  cold drawn steel tubes of aisi 4130 material or round steel bars, by grinding and precision polishing on the outside diameter of th 4130 round bar and then hard chromed to a certain thickness on the OD. 4130 Chrome hollow bar and 4130 solid  hard chrome bar both very popular components for producing hydraulic cylinder parts especially cylinder shafts. Heat Treatment Of 4130 Hollow Rod 1.Quenched+Tempered(+QT) Quenching and tempering refers to the hardening (Quenching) of 4130 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. the 4130 chrome hollow rod is hard but also brittle. The subsequent high tempering temperature leads to an increased yield and tensile strength as well as to high elongation and toughness values. 2. Normallized (+N) Normal annealing refers to ...

  There are many advantages of using  hollow piston rod .On the one hand, it can obviously reduce the weight of the whole structure. On the other hand, it can further improve the use performance of mechanical equipment. In other words, with the emergence and application of hollow piston rod, the equipment has a greater development space in the performance and use. However, to give full play to the use performance of  hollow bar ,first of all, it needs to ensure its straightness. In the process of straightness detection, do you know which methods can be used? Let's get to know the details below! In general, to accurately detect the straightness of the hollow piston rod, four different methods can be selected. The first method is the pitch method. Usually, this method is mainly used for measuring long parts. For example, when the piston rod is divided into several small sections, the relative readings of each segment can be measured with the aid of the level, auto...