the effects of molybdenum on high manganese steel castings

Many small and medium-sized founders often ignore the effects of chemical composition on high manganese steel castings when doing high manganese steel. Even some smelting masters do not understand the effects of chemical composition on castings. Today, we can learn the role and mechanism of molybdenum in high manganese steel casting.

1.Molybdenum can inhibit the formation of carbonation and promote the formation of pearlite. Therefore, the addition of molybdenum has a good effect on improving the cracking ability and water-ferrous mass of large section castings, and prevents both brittleness when the welding, cutting or temperature is higher than 275 degrees Celsius. Simultaneous molybdenum is significantly improved

2.The effect of molybdenum to high manganese steel is expressed as reducing brittleness due to reducing grain boundary carbide during molding. After the heat treatment, the yield strength is increased when the molybdenum molybdenum contains less than 2%, while the plasticity of the tensile strength is not reduced.

High manganese steel can be used to use water reloluting in austenite after high manganese steel. Precipitated reinforcement treatment can also be used to give the austenite to dispersely distributed carbides to improve the wear resistance.

3.During the cooling phase of high manganese steel, molybdenum inhibits the decomposition of the austenite. Molybdenum can also form complex carburized bodies with iron and carbon. Due to strong binding ability of molybdenum and carbon, special carbides such as carbide, carbonized molybdenum, etc. can be formed when moled in molybdenum content.

4.Molybdenum is much smaller than carbon in steel, so that the carbide is slowly dissolved in steel, and this speed is very slow when the molybdenum content exceeds 0.5%. Therefore, the amount of high manganese steel containing molybdenum is small after crystalline solidification, and it has occurred in the carbide in heat treatment and it is difficult to dissolve into the austenitic matrix. This action can be postponed in steel in needle carbide precipitation, and the precipitation temperature moves in the low temperature direction. When the molybdenum content reaches a certain amount, the carbide in the cast structure can be substantially eliminated. Since chromium can precipitate a large amount of carbide in the cast structure, the effect of molybdenum is reversed, and therefore, molybdenum is often added to the chromium-containing high manganese steel to reduce the brittleness of the cast tissue. The precipitated carbide is difficult to dissolve during heating. This role can be used to precipitate to strengthen treatment, so that the dispersion of particulate carbides in the steel, improve the ability of steel against abrasive wear.

5.Molybdenum can also change the morphology of carbides. There is little germanium carbide in steel containing molybdenum and often become a nonprivice or granular shape. Due to the decrease in cast carbide, the layout of its distribution also changes, thus increasing the occurrence of excess of carbon fluid in the steel content in steel. According to the results of the study, the carbon content can be increased to about 1.7%. Carbon content increases to improve the wear resistance of material under non-strong striking abrasive wear conditions.

6.The molybdenum can also finely refine the microsurgic tissue of the water rear steel, and in the case where the chemical composition is the same, the heat treatment method and the process are the same, the molybdenum-containing high manganese steel is fine in heat treatment.

In summary, molybdenum is a useful element of high manganese, which proves that high manganese steel containing moral mens is good in abrasive abrasive abrasion conditions.

Anyang Huatuo Metallurgy Co., Ltd can supply various types of alloy additive for castings and steelmaking, such as FeP, FeS, FeMo, etc, if any interests welcome to consult us.