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heat treatment of metals in ancient China
Heat Treatment of Metals in Ancient China
The history of heat treatment of metals in China dates back to the Shang Dynasty (1600-1046 BCE). This early heat treatment was used to soften and harden bronze utensils and weapons such as knives and spearheads, by heating and cooling in a process that i......
1089 
Sophie
A Review of brazing (Part 1)
Introduction to brazing
brazing is a widely used method for joining two pieces of metal together, usually with a filler metal, such as copper, brass, bronze, or aluminum. The brazing process is fairly simple, as it involves heating the pieces of metal with a torch or other heat source and then in......
The starting point for purchasing concrete pumps
The Purchase of Concrete Conveying Pump
When it comes to the purchase of a concrete conveying pump, there are many factors to consider. These factors can be broken down into three categories; equipment, cost, and safety. Each category should be looked at in order to make sure that the equipment t......
thermodynamics
Thermodynamics
Thermodynamics is a branch of physical science that is concerned with the study of the relationship between heat, energy, and work. It studies how energy can be converted into different forms such as thermal energy, mechanical energy, and electrical energy, and how it can be transf......
Chuck
THE HISTORY OF EATING UTENSILS
One of the key elements of any civilization is the tools and utensils used by its people for the purpose of eating and food preparation. Eating utensils are usually the first tools invented by people, as the need for them is universally experienced. Not surprisingly......
Applicable occasions and working principle of pneumatic diaphragm pump
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Pneumatic diaphragm pumps are a type of positive displacement pump which uses motion generated by air, gas, or hydraulic pressure to move a flexible membrane, using vacuum suction to draw liquid or gas into a sealed chamber where it is pressurized and forced out of the chamber through an outlet.......
Different characteristics of special vibration bearings and ordinary bearings
Vibration special bearings and ordinary bearings have certain differences in performance, structure and manufacturing technology.
1. The same application is better than traditional bearings, such as electric motors, alternators and general-purpose machinery, which require smaller outer diameter a......
Basic knowledge required to be a grinder
Basics of Grinding
Grinding is an important process for producing metal pieces of various shapes and sizes. The process begins with raw materials — pieces of metal — and creates a finished product that is ready for designers and engineers to go to work with.
Grinding is complicated, which migh......
Installation of tapered roller bearings and shaft-connected bearings of water pumps
Installation of Cylindrical Roller Bearings and Pump Shaft Bearings
Cylindrical roller bearings and pump shaft bearings are commonly found in a variety of industrial applications. These bearings have been designed to be able to handle high loads and provide the necessary support for a variety of ......
Bearing measurement error
Measurement Error of Bearings
Bearings are devices designed to provide rotational and/or translational motion between two mating components. Bearings are commonly used in a variety of machinery and engineering applications, including automobiles, aircraft, centrifugal pumps and industrial machine ......
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