Blog - Jinan Zhongchuan Equipment Co., Ltd.

01 2025.04

What Type of Bolts are Used in Tower Cranes?

In the field of industrial precision machining parts and high-strength special fasteners, bolts play a crucial role in tower cranes. These bolts not only need to withstand high strength and heavy load...

14 2023.10

Factors Leading to Hydrogen Embrittlement

Factors that generate hydrogenThere are various factors that generate hydrogen. In most cases of hydrogen embrittlement failure in fasteners, the highest number of factors come from the pickling and s...

07 2023.10

What Is Hydrogen Embrittlement?

Hydrogen embrittlement is a serious problem,it can cause changes in the structure of materials and lead to a sharp decrease in mechanical properties. Despite decades of in-depth research, there are st...

04 2023.10

What Are the Microscopic Changes in Annealing During Heat Treatment?

Annealing ProcessThe heat treatment process of heating the metal or alloy to a suitable temperature, holding it for a certain period of time, and then slowly cooling it (generally cooling with the fur...

11 2023.09

What Are the Microscopic Changes in Austenitizing during Heat Treatment?

Normalizing ProcessNormalizing is a metal heat treatment process that involves heating the steel parts above the critical temperature (the temperature at which complete austenitization occurs) by 30~5...

08 2023.09

How to Prevent Hydrogen Embrittlement? How to Remove Hydrogen?

Prevention and dehydrogenationHydrogen embrittlement is largely unpredictable, and efforts to avoid it must begin at the design stage to determine part characteristics and subsequent manufacturing pro...

06 2023.09

What are the microscale changes in quenching during heat treatment?

Quenching processThe quenching of steel is the heat treatment process of heating the steel to the critical temperature Ac3 (hypoeutectoid steel) or Ac1 (hypereutectoid steel) above the temperature, ho...

31 2023.08

Metal Heat Treatment

Metal heat treatment is one of the important processes in mechanical manufacturing. Compared with other processing processes, heat treatment generally does not change the shape and overall chemical co...

23 2023.08

Monitoring of Bolt Tightening Torque, Division and Control Methods of Tightening Grade

Tightening torque detection methodTightening methodAlso known as increased screwing method, suitable for important fastener inspection.The tightening torque of the bolt connection of important parts s...