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Preparation of ceramic coat die by static self-spreading method for ferrous metal semi-solid processing

A static self-propagating, ferrous metal technology, applied in the field of material processing, can solve the problems of thermal shock, brittleness and tensile strength that have not been fundamentally solved, and achieve the effects of low coating cost, low cost and simple process

Inactive Publication Date: 2006-04-26
JIANGSU FASTEN TECH DEV CENT
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the past few decades, many people have conducted a lot of research and achieved a series of valuable results, but the problems of thermal shock, brittleness and tensile strength have not been fundamentally resolved

Method used

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  • Preparation of ceramic coat die by static self-spreading method for ferrous metal semi-solid processing
  • Preparation of ceramic coat die by static self-spreading method for ferrous metal semi-solid processing

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Embodiment Construction

[0023] Mold ceramic coating fusion coating test: the outer diameter, inner diameter, and height of the die are: ￠100, ￠33, and 50mm, respectively. Material is 45 # steel. The inner surface of the die is made of Al by static white spreading method 2 o 3 , the transition layer is Fe-based Al 2 o 3 Gradient Ceramic Coatings for Particle Reinforced Composite Materials. Al powder and Fe 2 o 3 The powder is mixed according to the stoichiometric ratio, the purity of the Al powder is 97%, the particle size is 70 mesh, and the Fe 2 o 3 Powder particle size 200 mesh, industrial pure. Melting process such as figure 2 shown. Among the figure, medicinal powder 1, guide tube 2, die 3, conduit 4, asbestos pad 5 and stopper 6. The inner surface of the die is roughly machined, and the powder is mixed uniformly, according to the filling density of 1.4-1.5 / cm 3 Fill the die. Guide tube up, catheter down. Fix the die, guide pipe and conduit together, and plug the openings of the g...

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Abstract

This invention relates to a static self contagious method to preparing ceramic coating die, which comprises the following steps: a, mixing the reaction raw material AL and Fe 203 powder; fill the die with the mixed powder, fixing the cavity die, skirt and duct together and cover the cap of the skirt and duct; b, preheating the die in the heater, taking the die out and setting vertical, moving the cap out; c, igniting the mixed powder, Al and Fe 203 will create thermite reaction, the product Fe and Al 203 will be in liquor condition, Al203 liquid phantom will adhere to the inner wall of the cavity die and crystallization, forming continuous coating lever in the inner wall; d, Fe liquor will curing at last, removing the Fe solid in the duct tube, cooling and removing the skirt and duct, getting the rough cavity die; e, abrasive machining the ceramic coating in the inner wall of the rough cavity die.

Description

Technical field: [0001] The invention relates to a semi-solid metal processing die, in particular to a ceramic-coated die for ferrous semi-solid processing prepared by a static self-propagating method. It belongs to the technical field of material processing. Background technique: [0002] In recent years, semi-solid metal processing technology has developed rapidly and has been applied to a certain extent in the automotive industry and other fields. However, it is still non-ferrous alloys with low melting points that are really put into large-scale industrial applications. The reason is that the ferrous metal has a high melting point and is difficult to operate. Since there is no mold material specially developed for ferrous metal semi-solid processing, it is generally made of ordinary hot work die steel. Working at high temperature and high pressure above 1300°C, after secondary heating, the semi-solid alloy has a solid phase. At this time, the alloy contains low crystal...

Claims

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Application Information

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IPC IPC(8): B22C9/06C04B35/65
Inventor 陈威刘礼华谭佃龙马向平孙长青孙文张伟红
Owner JIANGSU FASTEN TECH DEV CENT
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