When the application characteristics of galvanized steel pipes vary, so do the requirements for the aluminum alloy composition after bright heat treatment, leading to differences in the production processes for bright tempering heat treatment. After cold drawing, the raw material of galvanized steel pipes retains thermal stress, which is not conducive to the pipe's resistance to intergranular corrosion cracking. Each level of cold drawing significantly increases the raw material's sensitivity to intergranular corrosion cracking.
The cold drawing grade also negatively impacts the high-temperature long-term tensile strength of austenitic stainless steel plates. Generally, higher operating temperatures or longer cracking lifetimes necessitate lower cold drawing grades. The quenching and tempering heat treatment process for galvanized steel pipes is complex, requiring the adjustment of machinery's internal space to achieve acceptable aluminum alloy compositions.
The cooling section of bright quenching equipment is considerable in size. Therefore, state-of-the-art bright quenching equipment typically employs forced convection cooling in its cooling section, featuring three independently adjustable cooling zones for air volume control. Hot-rolled coils are divided into three segments along their total width, and the cooling rate is adjusted through air volume drainage to control the plate shape.
The production of galvanized steel pipes is straightforward, utilizing drilling machines. All raw materials for galvanized steel pipes undergo top-tier heat treatment processes throughout the manufacturing cycle. CNC grinding machines can customize different models and specifications, making them portable and less prone to hydraulic system damage during routine tasks.
Surface spraying treatment must be consistent to achieve a certain level of flatness and smoothness. Otherwise, the hydraulic system will bear linear loads with the trunnion as the fulcrum. The pinholes at the end of the hydraulic system should align with those of the earrings. A support point should be installed between the engine oil pan and the hydraulic system, given the large surface area of the hydraulic system.
