Of Monel K-500 Alloy Heat Processing Performance Of Experimental Research

Monel (Monel K-500) is a nickel-based alloy which is supplemented by nickel alloys main and copper minor. The alloy, because of its high strength, high pressure, withstanding corrosion and other advantages has become the most widely used nickel alloys. It is widely used in oil refining, chemical, marine, nuclear, metallurgical, textile, printing and dyeing, paper making, food machinery, medical equipment and other Dayton domain. With the rapid development of modern industry, the performance of Monel has been increasingly high demanded, and many important properties such as hardness, wear resistance, corrosion resistance, erosion resistance, oxidation resistance, heating resistance performance want more And more demanding. Monel K-500 is now increasingly demanded as well as the more stringent performance required, while the domestic production of Monel K-500 alloy product performance does not meet foreign standards, and especially thermal processing performance of Monel K-500 alloy is very special.Heating process performance of Monel K-500 alloy in the high temperature, under different deformation conditions has been understood and mastered in this experimental, which provides the basis to set thermal processing technology of Monel K-500 alloy. Based on the analysis on microstructure and mechanical properties of Monel K-500 heating and simulating thermal processing, content and conclusions are as follows:1) Cast specimens with different heating rate will be heated to 1150℃to study if there is burned surface phenomenon. There was no obvious over-burned phenomenon on the surface of the slab.2) The size specifications forФ136×Ф165×550mm of Monel K-500 alloy slab is heated with different heating rates. The results show that the rapid heating rate corresponds to longer holding time, but the total heating time is short.3) Gleeble-1500 thermal simulation testing machine has been used to make axisymmetric isothermal compression heating simulation experiments and tensile experiments to obtain mechanical properties, according to witch parameters of thermal processing technology will be got. Follows are the results:ⅠThe material has displayed good mechanical properties in the thermal processing temperature of 1100℃.ⅡWhen the strain rate is 5.0 s-1,the curve shows a significant steady-state balance of dynamic recrystallization.ⅢWhen it is large deformation, stress and strain has a slight decrease, no big variation, which can be considered negligible.4) Samples used heat processed has been made into metallographic samples to be analyzed on its tissues. The results are as follows as:ⅠThe tissues are smaller when strain rate is 5s-1.ⅡWhen deformation temperature is 1100℃, the grains size are fine and distribute uniformly.ⅢWhen deformation is 35%, the grains are the smallest, and distribute most uniformly.