Aluminum alloy castings

An Alloy Material of V Used in the Third Air Pipe of Petrochemical Industrial Furnace and Its Application

[Technical field]

[0001] The invention belongs to the technical field of inorganic alloy materials, in particular to an alloy material used for the tertiary air duct of a petrochemical industrial furnace and its application.

[Background technology]

[0002] The working medium of the tertiary air duct of the petrochemical industrial furnace is air and granular calcined petroleum coke, and the working temperature is usually 1200-1350 degrees C. At present, most of the materials of this kind of tertiary air duct are imported HK40, whose chemical composition is (mass percentage): C 0.35-0.45%, Si 0.5-2.0%, Mn ^ 1.50%, Cr 23.0-27.0%, Ni 19.0-22.0%, Mo ^ 0.50%, Pyi 0.04%, Syi 0.04%, Fe surplus. HK40 belongs to medium carbon heat-resistant steel and has good high temperature working ability. However, after more than one year of use, the tertiary air ducts made of HK40 are prone to melting and perforation, and their service life and replacement cycle are short, resulting in increased production costs.

[Content of invention]

[0003] In view of the shortcomings of the prior art, the object of the present invention is to provide an alloy material for the tertiary air duct of a petrochemical industrial furnace. Compared with HK40, the tertiary air duct made of this alloy material exhibits significantly better mechanical properties and hardness at room and high temperatures, and has better erosion resistance and longer service life in application, thus significantly reducing replacement times and saving cost.

[0007] In the preparation of the above-mentioned alloy materials for the tertiary air ducts of petrochemical industrial furnaces, chromium, nickel, tungsten, cerium, ferroniobium, ferrosilicon and ferromanganese can be used as raw materials, weighed and proportioned according to the proportion of each element, and then processed by conventional alloy preparation process. During the preparation process, the chemical composition of the sample package can be analyzed by direct reading spectrometer to ensure that the chemical composition is up to the standard. The melting temperature can be monitored by familiar and well-known methods in this field, such as infrared thermometer or contact thermocouple.

[0008] The object of the present invention is also to provide the above alloy material for the application in the preparation of tertiary air ducts of petrochemical industrial furnaces. The process of making tertiary air ducts of petrochemical industrial furnaces from known alloy materials is well known to those skilled in the field, such as those conventional processes in which the tertiary air ducts can be made from HK40 in the prior art. More specifically, for example, conventional static casting and centrifugal casting can be used. The alloy material of the present invention can be used to manufacture products of various specifications and sizes according to the needs of use.

[0009] Compared with the material used in the existing technology to prepare the third air duct, such as HK40, the present invention makes the components play a more superior synergistic function by adjusting the element composition of the gold material. The tertiary air duct made of this alloy material has excellent mechanical properties and hardness at room temperature and high temperature, excellent wear resistance, and its comprehensive performance in practical application is obviously superior to HK40. The invention can effectively reduce the dependence of related industries on imported materials and promote the healthy development of the industry. [0010] The drawings briefly illustrate that Fig. 1 is a structural schematic diagram of the tertiary air duct of a petrochemical industrial furnace prepared in the embodiment.