Molybdenum is found in the late 18th century, and there is no presence of molybdenum metal form under natural conditions. Despite this, the main mineral of molybdenum, molybdenite, has been used in ancient times, but molybdenite is similar to lead , galena and graphite . It is difficult to distinguish. The word "molybdos" is lead in Greek. the meaning of. Metal Roof Flashing,Colour Customized Pipe Flashing,Aluminum Roof Flashing,Oem Roof Flashing Ningbo Yongsheng Rubber And Plastic Products Co., Ltd. , https://www.yscnrubber.com
It was found to contain molybdenum in a Japanese sword in the 14th century. By 1778, the Swedish scientist Carl Wilhelm Scheele confirmed the existence of molybdenum. He heated the molybdenum ore in the air to produce a white oxidized powder. Shortly thereafter, by 1782, Peter Jacob Hjelm succeeded in reducing this oxide with carbon to obtain a ferrous metal powder, which he called "molybdenum."
In the 19th century, molybdenum was basically used as an experimental product, and it was gradually produced later. In 1891, France Snyder Schneider) the first company to produce molybdenum as an alloying element molybdenum-containing armor plate, they immediately found that only half the density of molybdenum, tungsten, so since, molybdenum effective in many areas of steel alloy application to Replaced tungsten.
The outbreak of the First World War led to a sharp increase in demand for tungsten and extreme tension in the supply of tungsten and iron, which replaced tungsten in many high-hardness and impact-resistant steels. As a result, the increase in demand for molybdenum has prompted further research on the demand for molybdenum. At this time, the Climax mine, a large mine in Colorado, was developed and put into production in 1918.
Atomic weight of molybdenum: 95.95 g / g atomic weight of tungsten: 183.85 g / g atom
The English word "molybdenum" appeared in the word "molybdenum" in about 1816. The famous Japanese artist Masamune in the 14th century confirmed that the sword contains molybdenum (Reference: Sutulov.A. "Molybdenum Encyclopedia" <Metal Part of the compound>, Chile, 1978).
The end of the First World War led to a sharp drop in demand for molybdenum. To solve this problem, it was necessary to develop the application of molybdenum in the new civil industry. Soon, many new low-molybdenum alloy steels for the automotive industry were tested and approved. In the 1930s, the idea was that the forging and heat treatment of molybdenum-based high-speed steel required a proper temperature. This point of view is a technical breakthrough. Since then, the development of molybdenum as an alloying element in steel and other fields has entered a new stage. In the late 1930s, molybdenum was already widely used as an industrial raw material. The end of the Second World War in 1945 once again stimulated the development and research of the application of molybdenum in the civil industry, and the post-war reconstruction has opened up a vast market for the application of many molybdenum-containing tool steels.
In the years after 1945, the application fields of molybdenum, molybdenum alloys and molybdenum compounds have been greatly expanded, and sufficient resource supply is consistent with increasing demand. With the improvement of the process, the recovery rate of molybdenum has been greatly improved.
Although steel and cast iron occupy a huge market share, molybdenum has many applications, so molybdenum is widely used in superalloys, nickel -based alloys, lubricants, chemicals, electronics and other fields.