SU831323A1

SU831323A1 - Melt treatment method

Info

Publication number: SU831323A1
Application number: SU792798127A
Authority: SU
Inventors: Рудольф Витальевич Чуднер; Михаил Афанасьевич Юрьев; Марк Александрович Старосельский
Original assignee: Предприятие П/Я Р-6500
Priority date: 1979-07-18
Filing date: 1979-07-18
Publication date: 1981-05-23

Description

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Изобретение относитс к литейному производству, в частности к способам обработки расплавов в жидком или в зком состо нии в литейных формах.The invention relates to foundry, in particular, to methods for treating melts in a liquid or viscous state in foundry molds.

Известен способ обработки- расплавов , включающий засыпку по поверхности формы добавок перед заливкой расплава р..There is a method of processing-melts, including filling on the surface of the form of additives before pouring the melt p ..

Недостатком этого способа вл етс значительный брак при получении тонкостенных отливок -по спа м и недоливам . The disadvantage of this method is a significant waste in the production of thin-walled castings in spam and underfilling.

Цель изобретени - снижение тонкостенных отливок по спа м и недоливам путем повышени жидкотекучести расплава.The purpose of the invention is to reduce thin-walled castings in spheres and under-pouring by increasing the fluidity of the melt.

Указанна цель достигаетс тем, что массу добавок берут в пределах 0,001-0,05% от массы расплава в это части формы.This goal is achieved in that the mass of additives is taken in the range of 0.001-0.05% of the mass of the melt in this part of the mold.

В качестве добавок используют поверхностно-активные вещества.Surfactants are used as additives.

Введение активных добавок менее 0,001% не улучшает жидкотекучесть расплава и не оказывает практически никакого воздействи на качество отливок. При вводе в расплав более 0,05% активных добавок значительног увеличе,ни эффекта жидкотекучести также не наблюдаетс , а ввод свышеThe introduction of active additives less than 0.001% does not improve the fluidity of the melt and has virtually no effect on the quality of the castings. When more than 0.05% of active additives are introduced into the melt, a significant increase is not observed, nor a fluidity effect is also observed, and more

0,1% измен ет структуру стали и соответственно физико-механические свойства отливок. Расположение активной добавки по всей длине тонкостенной части форки обеспечивает посто нный контакт этой добавки с головной частью струи и обеспечивает равномерное распределение активного вещества в движущейс струе 0.1% changes the structure of steel and, accordingly, the physicomechanical properties of castings. The location of the active additive along the entire length of the thin-walled part of the fork ensures a constant contact of this additive with the jet head and ensures an even distribution of the active substance in the moving jet.

o расплава.o melt.

Действи поверхностно-активных веществ основано на обволакивающем воздействии нев зким веществом твердых составл кмцих высокотемператур5 ного расплава. Например, твердые кристаллические образовани в охлажденном металле (имеющем температуру ниже ) окружены (смочены) тончайшими пленками меди, которые The action of surfactants is based on the enveloping effect of non-viscous solid matter of high-temperature melt. For example, solid crystalline formations in a cooled metal (having a temperature below) are surrounded (dipped) by the thinnest copper films, which

0 играют роль жидкостной смазки и резко улучшают подвижность твердо-жидкого расплава (суспензии),0 play the role of liquid lubricant and dramatically improve the mobility of solid-liquid melt (suspension),

Способ реализуетс следующим образом .The method is implemented as follows.

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Claims

In the thin cavities of the sand foundry mold. The mold having a cross section of 4-6 mm, in the path of the melt (steel .35 L) lay wires or spirgshi with a diameter of 0.8-1.0 mm from surface-active materials (for example, copper wire, widely used in electrical engineering industry. When moving, the thinning of the copper wire and its constant assimilation by the end part of the metal stream is carried out in thin cavities of the form of the pro I.I.SHOD, while in the case of interaction with the copper wire the melt is filled em area of thin cavities of the form is 30-80% larger without wires. Identical bands are located in the same form on both sides of a single stack. Wire consumption with different cross-sectional area ranges from 0.001% to 0.05% of the melt weight found: Such a quantity of 15 molten element makes almost no changes to the estimated chemical composition of both structural and special alloyed steels according to the existing State Standards and Specifications, 20 The proposed method allows to obtain thin-walled castings from high-temperature alloys without additional arts. nnogo overheating, 4 which in turn allows iebezhat defects occurring shrinkage (hot cracks usgdtsochnyh shells. Claim 1. Method of processing melts, including the introduction into the form of additives before pouring the melt, is required in order to reduce the spoilage of thin-walled castings in spas and under-pouring by increasing the flowability of the melts, the mass of additives is in the range of 0.001-0 , 05% of the mass of the melt in this part of the form, 2, The method according to claim 1, I differ by the fact that surfactants are used as additives, sources of information taken into account during the examination 1. US Patent 3239319 , cl, 23-183, 1966,