The residual stress of welding is caused by the non-uniform temperature distribution of welding parts caused by welding, the thermal expansion and cold shrinkage of weld metal, etc., so the residual stress will inevitably be generated alon…

The deformation causes of precision and complex molds are often complex, but we can reduce and control the deformation of molds by mastering the deformation rules, analyzing the reasons for the deformation, and adopting different methods t…

In actual production, heat treatment deformation adds many difficulties to subsequent processes, especially mechanical processing, which affects production efficiency and leads to scrap due to excessive deformation, increasing costs. Defor…

In ancient times, there were no special utensils for incense burning, but copper, pottery, porcelain, tiles and wood flowers were used instead. Since handing slow to make boshan incense burner, only began to have a special name, but specia…

At present, low pressure vacuum carburizing heat treatment has been gradually applied in the automobile industry of developed countries in the world. It will gradually replace conventional controlled atmosphere carburizing (or carburizing)…

Aiming at the characteristics of time degeneration, large hysteresis and non-linearity of vacuum sintering furnace in powder metallurgy, the fuzzy control algorithm is adopted, and the PID control effect is not ideal. PID control and fuzzy…

1. Titanium alloys have been widely used in aerospace due to their high specific strength, good creep resistance and high temperature performance. However, with increasing dosage of titanium alloy, titanium alloy parts using conditions of …

Vacuum smelting equipment is under the condition of vacuum, the easy oxidation of various metals, precision alloy, rare earth alloy, active metal, each department hydrogen storage alloy, soft magnetic alloy, high temperature alloy and braz…