Search results for keyword: black
shrinkage cavity
Introduction
In civil engineering, holes are often caused by the process of shrinkage. Shrinkage can occur in both concrete and soil materials, resulting in a variety of different types of holes. Shrinkage holes can lead to structural problems, such as decreased stability and increased stress, as......
1124 
Sophia
Coal Gangue Comprehensive Utilization Technology
Integrated Utilization of Coal Gangue
Background
In modern energy development and industrial production, energy is an important material basis, and coal is an important energy source. Coal burning and other smelting processes during industrial production will inevitably produce solid residues— ......
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......
molding sand
Garnet is one of the most common types of sand in the world. This reddish-brown colored mineral is composed of a wide variety of elements and is made up of a variety of particle sizes. It is primarily used as an abrasive material in a variety of industries, such as sandblasting, water filtration, ......
Riser
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Computers in the Classroom
The rise of computer technology in classrooms over the past decade has produced both positive and negative effects. As computers have become more advanced and accessible, they have been implemented as an educational tool in a variety of ways. In order to maximize the ......
horn setting
Jackhammering is an essential component of laying down a secure paving surface in any driveway. It’s necessary to use a jackhammer in order to break up the existing pavement, whether it’s concrete, asphalt, or stone, so that a suitable sub-base can be properly formed.
With proper preparation an......
Production method of electrogalvanized steel sheet with high anti-blackening performance
Production Method of Electro-galvanized Steel Sheets with High Anti-blackening Property
Introduction
Electro-galvanizing steel is a kind of hot-dip galvanized steel, which can obtain high performance of anti-blackening rusting after surface treatment. It is widely used in the production of autom......
metal processing technology metal processing technology
Metal Processing Technology
The use of metal processing technology dates back centuries, to the early forges and blacksmiths of pre-industrial times. In modern industry, metal processing still forms an essential element of any equipment’s design, manufacture and maintenance. Humans, more than an......
Manufacturing method and delivery status of seamless steel tubes for structural purposes (GB/T 8162-1999)
Method for Manufacturing and Delivery Status of Seamless Steel Pipe for Structural Usage (GB/T 8162-1999)
Seamless steel pipes are extremely common in structural applications as they are used for critical components for axial and torsional loads. Therefore, it is incredibly important that the fab......
GB 9446-88 Test method for cold cracking of welding pins
Weld flash burr test method
Weld flash burr test method is a testing method used to evaluate the quality of cold and/or strain cracks on welds by using a plug-in mechanism. This testing method has been widely used in a variety of industries to determine the quality of welds, including shipbuildin......
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