L,R,C method and device for casting metal mold casting of amorphous, ultracrystallite, microlite, cryptomere

Abstract

The invention discloses an L, R, C method and a device for casting amorphous, ultracrystallite, crystallite, microlite and the like metal mold castings. Casting an amorphous steel round tube casting is taken as an example; a casting mold 6 is produced by using a thin steel plate with a thickness of delta, a fast pressure head 5 depresses liquid metal 4 in a differential pressure type pressure chamber 3 at a speed of n to lead the liquid metal 4 to enter the casting mold 6 through a sprue 11 and an ingate 10. When the liquid metal 4 ascends at a u speed at the bottom of the casting mold 6 and forms a liquid column with a height of Delta L, a liquid nitrogen injection mechanism 8 starts to inject liquid nitrogen to the shell of the casting mold 6. Under the thermal absorbing action of liquid nitrogen gasification, the liquid metal is rapidly solidified into the amorphous solid metal with a length of Delta m. When the liquid nitrogen injection mechanism 8 starts to inject liquid nitrogen, the liquid nitrogen mechanism ascends at a speed of u along the shell of the casting mold 6, that is, when the Delta m liquid nitrogen is rapidly solidified into the delta m amorphous solid metal, the delta m liquid metal complements the casting mold 6, meanwhile, the liquid nitrogen injection mechanism 8 ascends to delta m height. The steps are continuously repeated and finally the amorphous steel round tube casting is cast.

Description

technical field [0001] The technical fields of the patent of the present invention are mainly black and non-ferrous metal rapid solidification technology to obtain amorphous, microcrystalline and fine-grained metal structures, low-temperature studio technology and low-temperature liquid nitrogen high injection speed, ultra-thin liquid film injection technology, continuous casting technology . Background technique [0002] The background technology of the patent of the present invention is in addition to the same parts as the applied Chinese invention patent "L, R, C method and equipment casting amorphous, ultrafine crystal, microcrystalline and other metal profiles" (patent application number 200410002605.0), and the following part. [0003] Looking at the world at all times and in all over the world, the methods and processes of casting molding castings are: [0004] 1. According to the required shape and size of the castings, sand casting molds or metal casting molds wit...

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Problems solved by technology

[0006] Although the use of sand casting meets the requirements of casting molding castings to a considerable extent, at the same time, sand casting itself has extremely serious problems.

First of all, sand molds, core sand, coating preparation, molding, core making, box pouring, casting sand cleaning and other processes all produce a lot of dust, sewage, harsh noise, and harmful gases, making the foundry a city's atmospheric environment and city water. sources of pollution, damage to the ecological environment, and damage to people's health

[0007] Because the thermal conductivity λ of quartz sand is very small, the heat transfer process of the liquid metal to the atmosphere through the sand mold is slow, and the solidification and cooling process of the liquid metal is slow, which makes the casting grain coarse and shrinkage cavity, shrinkage porosity and other castings Defects, the mechanical properties of castings are greatly reduced, especially for large and heavy castings

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