The role of molybdenum
Tool steel and high-speed steel：One of the earliest applications of molybdenum was used as a substitute for tungsten in tool steel and high-speed steel, which was effective and inexpensive. The atomic weight of molybdenum is about half that of tungsten, so 1% of molybdenum is roughly equivalent to 2% tungsten. Since these high alloy steels are used in the machining, cutting and forming of metal parts, they must be both hardness, strength and toughness over a large temperature range.
Cast iron：Radon increases the strength and hardness of cast iron by reducing the transition temperature of the pearlesium. It also increases strength and creep resistance at high temperatures. High chromium cast iron containing 2% to 3% of molybdenum shows greater impact toughness than high chromium cast iron without molybdenum, and its application is ideal in harsh abrasive conditions, for example, in mining, milling, crushing and other processes. These cast irons have a qualified performance, which eliminates the need for costly heat treatment, making them a cheap alternative to other abrasive materials. Reducing the amount of Osteosteron-forming elements such as nickel and manganese also minimizes the hold-up of low-temperature Austrogen -- the potential cause of premature damage.
The application of high Si-Mo plastic iron with silicon content of 4% and molybdenum content of 1% is attracting more and more interest. Their good strength at 600℃ makes them an effective and inexpensive alternative to iron and steel with high alloy content in high-temperature applications, such as in turbocharger housings, engine exhaust manifolds and heating furnace components. The quenched ball-ink cast iron has a unique microstrub, which is more than 1000MPa (145ksi) in strength and has good impact toughness. Their specific properties make them ideal for special applications such as large gears and shafts required for power generation, marine engines and large mining equipment.
Powder metallurgy：The most important limitation of increasing the alloy content of high alloy ingot materials such as high-speed steel is the tendency to bias during slow cooling. Powder metallurgy technology makes the steel liquid atomized into microdrops, which cool extremely quickly and prevent the occurrence of internal partialization. The steel produced by the condensation of these particles has a fairly uniform microscopic tissue and has numerous advantages over the same traditional brands of steel. Many powder metallurgical (PM) high-speed steels, stainless steel and nickel-based alloys have been put on the market, and this technology foreshadows the possibility of producing a new generation of high alloy steels in the future.
In the ultra-heat-resistant alloy industry, powder metallurgy (PM) technology produces key components with high alloy content, such as turbine components. Mo/Cu and W/Cu heatsheets for heat treatment in microelectronics.
