Blog - Jinan ZhongChuan Equipment Co.,Ltd.

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...

09 2023.08

Basic Knowledge of Fasteners

An average of 500 fasteners are used per car in a car500types/50kg/4000pieces, according to the latest data, in the automotive industry 23%of maintenance issues are caused by loose fasteners,12%of new...

27 2023.07

Various Anti-Loosening Methods for Threaded Fasteners (Customer Provided)

Anti-loosening method: Increase elastic gasketsType of anti-loosening: Increase axial clamping forceReusable, can be used immediatelyAnti-loosening method: Use locking nutType of anti-loosening: Threa...

04 2023.07

Principle of Bolt Thread Fastening and Torque Setting

Fastening torque and pre-tightening force Rotating nuts or screws cause the screw to elongateThe clamping force generated by the elongation of the screw clamps the jointWhat we need is the clamping fo...

20 2023.06

The Importance of Wind Turbine Foundation Anchor Bolts

The importance of wind turbine foundation anchor boltsWind power is a clean and renewable energy source that has been widely applied and developed worldwide. As the main connecting components of wind ...

08 2023.06

Basic Knowledge of Bolts

Bolt axial force and pre-tension force, are they the same concept?Bolt axial force and pre-tension force are not completely the same concept, but they are related.Bolt axial force refers to the tensio...

27 2023.05

Six Surface Treatment Methods For Fasteners

1. Electroplating ZincThe most commonly used coating for commercial fasteners is electroplating zinc. It is cost-effective and has a good appearance, with various colors such as black and army green. ...

12 2023.04

How to Choose Flat Washers and Spring Washers?

We often see in mechanical equipment:some bolts are connected with flat washers, and some bolts are connected with spring washers.Today, we will share some knowledge about bolt connection design. Flat...

04 2023.03

What Are The Defects Caused By Fastener Forming Process

During the processing and manufacturing of fasteners, due to unreasonable design, improper material selection, processing technology, heat treatment and surface treatment process, the quality of faste...

02 2023.03

The Role Of Heat Treatment Technology In Improving The Manufacturing Level Of Fasteners

High-strength bolts determine the main connection functions of high-end machinery and equipment, reflect the service life, reliability and economic affordability of machinery and equipment, and are the core of high-end machinery manufacturing.

01 2023.03

How Can Fasteners Meet The Technical Requirements Of New Energy Vehicles?

With the strong development of new energy vehicles. Global auto manufacturers are also fully transforming to new energy vehicles, and auto parts manufacturers are no exception. Therefore, many auto pa...

28 2023.02

Analysis Of The Reasons For The Loosening Of Assembly Bolts

The purpose of bolted connection of parts is to make the two parts connected closely fit. At the same time, in order to bear a certain dynamic load and ensure the reliable connection and normal operat...