The Heat-Affected Zone (HAZ) is one of the most critical aspects of welding metallurgy. It's the area of base metal that is not melted but has undergone significant changes in its microstructure due to exposure to high temperatures during welding. The HAZ can affect the me ----more

China's geological exploration company enters south…

Recently, the Shandong Coalfield Geological Bureau Taishan Geological Exploration Company and the South African REOTIC Group signed the Southern Africa Mineral Rights Cooperation Framework Agreement. The two sides will cooperate in the development of coking coal, lithium mine, antimony ore and pe ----more

Qi family classroom: basic principles of balcony decora…

In many families, the balcony is just a place to wash clothes and place potted plants. Few people will choose to make a fuss on the balcony. In fact, a balcony with a casual function can make life happy and pleasant. There are a lot of exquisite balcony decoration, the following will take a look a ----more

The structure of quartz sand

Quartz sand is a hard, wear-resistant, chemically stable silicate mineral whose main mineral component is SiO2. The color of quartz sand is often milky white, colorless, and gray. Hardness is 7, brittle, no cleavage, shell-like fracture. Grease gloss, relative density of 2.65, its chemical, th ----more

The Heat-Affected Zone (HAZ) is one of the most critical aspects of welding metallurgy. It's the area of base metal that is not melted but has undergone significant changes in its microstructure due to exposure to high temperatures during welding. The HAZ can affect the me ----more