Anti-corrosion steel pipe triggers the high-temperature tempering brittleness of fine anti-corrosion steel pipe impurity elements such as phosphorus, tin, antimony, etc.. (2) in different forms, to varying degrees to promote or slow down the high-temperature tempering brittleness of the alloying elements. There are chromium, manganese, nickel, silicon, etc. to promote the role of molybdenum, tungsten, titanium, etc. to retard the role.
Anti-corrosion steel pipe elements in the role of high-temperature tempering brittleness
Carbon also plays a role in promoting. General carbon precision bright tube on high-temperature tempering brittleness is not. The sensitivity of the binary or multi-alloy steel containing chromium, manganese, nickel and silicon is very sensitive, and the degree of sensitivity varies according to the type and content of alloying elements. 45# anti-corrosion steel pipe of the nature of high-temperature tempering brittleness, it is generally believed that phosphorus, tin, antimony, and other impurity elements in the original austenite grain boundary bias, resulting in grain boundary embrittlement.
And manganese, nickel, chromium and other alloying elements and the above impurity elements in the grain boundaries of co-polarization, promote the enrichment of impurity elements and increase embrittlement. Molybdenum, on the contrary, has a strong interaction with phosphorus and other impurity elements, which can make the precipitation phase in the crystal and prevent the phosphorus grain boundary polarization, which can reduce the high-temperature tempering brittleness of rare earth elements also have a similar effect with molybdenum. Titanium more effectively promote phosphorus and other impurity elements in the crystal precipitation, thus weakening the impurity elements of the grain boundary polarization slowed the high-temperature tempering brittleness.