RU1811964C - Sampler for hot-shortness testing of casting alloys and steel - Google Patents

Sampler for hot-shortness testing of casting alloys and steel

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Publication number
RU1811964C
RU1811964C SU4911637A RU1811964C RU 1811964 C RU1811964 C RU 1811964C SU 4911637 A SU4911637 A SU 4911637A RU 1811964 C RU1811964 C RU 1811964C
Authority
RU
Russia
Prior art keywords
steel
hot
shortness
sampler
testing
Prior art date
Application number
Other languages
Russian (ru)
Inventor
Борис Павлович Трапезников
Александр Викторович Шевченко
Юрий Евгеньевич Ислентьев
Original Assignee
Б.П. Трапезников, А.В. Шевченко и Ю.Е. Ислентьев
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Б.П. Трапезников, А.В. Шевченко и Ю.Е. Ислентьев filed Critical Б.П. Трапезников, А.В. Шевченко и Ю.Е. Ислентьев
Priority to SU4911637 priority Critical patent/RU1811964C/en
Application granted granted Critical
Publication of RU1811964C publication Critical patent/RU1811964C/en

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Abstract

Сущность изобретени : проба содержит тонкостенную цилиндрическую втулку t с ребром 2 по ее высоте на внутренней поверхности и разрезом 3 по высоте втулки. 3 ил.SUMMARY OF THE INVENTION: the sample contains a thin-walled cylindrical sleeve t with a rib 2 along its height on the inner surface and a cut 3 along the height of the sleeve. 3 ill.

Description

Изобретение относитс  к литейному производству, а именно к определению литейных свойств сплавов и сталей, в частности к определению гор челомкости.The invention relates to foundry, in particular to the determination of the casting properties of alloys and steels, in particular to the determination of ductility.

Цель изобретени  - повышение точности определени  гор челомкости литейных сплавов и сталей путем исключени  вли ни  прочностных характеристик керамической формы на образование гор чих трещин.The purpose of the invention is to increase the accuracy of determination of the ductility of cast alloys and steels by eliminating the influence of the strength characteristics of the ceramic mold on the formation of hot cracks.

На фиг. 1 показана технологическа  проба , вид сверху; на фиг.2 - разрез А-А ф иг.1; на фиг.З - вид по стрелке Б фиг.1.In FIG. 1 shows a process sample, top view; figure 2 is a section aa fig.1; Fig. 3 is a view along arrow B of Fig. 1.

Технологическа  проба содержит тонкостенную цилиндрическую втулку 1 с ребром 2, выполненным по всей ее высоте на внутренней поверхности; и с разрезом 3, выполненным по всей высоте втулки,The technological sample contains a thin-walled cylindrical sleeve 1 with a rib 2 made along its entire height on the inner surface; and with a cut 3 made along the entire height of the sleeve,

Пробу изготавливают следующим образом . С помощью металлической пресс-формы изготавливают модели пробы и литниковой системы из модельной массы и собирают их в модельный блок, На модельном блоке изготавливают четырехсложную керамическую оболочку нанесением огнеупорной суспензии на этилсиликатном св зующем с обсыпкой слоев кварцевым песком и послойной сушкой. Вытопку модельного состава производ т в гор чей воде при температуре 95-98°С. Керамическую оболочку заформовывают в металлическую опоку с опорным наполнителем (кварцевым песком). Перед заливкой форму прокаливают при температуре 900°С в течение 10 ч и заливают исследуемым литейным сплавом или сталью.The sample is made as follows. Using a metal mold, models of the sample and the gating system are made from the model mass and assembled into a model block. On the model block, a four-compound ceramic shell is made by applying a refractory slurry on ethyl silicate binder with layers of silica sand and layer-by-layer drying. The model composition is refined in hot water at a temperature of 95-98 ° C. The ceramic shell is molded into a metal flask with support filler (quartz sand). Before pouring, the mold is calcined at a temperature of 900 ° C for 10 hours and filled with the test cast alloy or steel.

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Остывший блок отливок проб выбирают из опоки и отдел ют отливки от литниковой системы на виброустановке. Очистку поверхностей отливок провод т в щелочной ванне с последующим травлением в сол ной кислоте .- Отливки проб исследуют на наличие гор чих трещин, которые определ ют визуально , мелкие трещины вы вл ют с помощью лупы, Определ ют количество проб в блоке с гор чими трещинами и какой процент эти пробы составл ют от общего количества проб блока.The cooled block of sample castings is selected from the flask and the castings are separated from the gate system in a vibration unit. The surfaces of the castings are cleaned in an alkaline bath followed by etching in hydrochloric acid. - The castings of the samples are examined for the presence of hot cracks, which are visually determined, small cracks are detected with a magnifier, The number of samples in the block with hot cracks is determined and what percentage of these samples make up the total number of block samples.

Предлагаема  проба повышает точность определени  гор челомкости литейных сплавов и сталей при литье в керамические формы, так как исключает вли ние керамической формы на образование гор чих трещин, что позвол ет выбрать более оптимальные режимы выплавки и заливки литейных сплавов и сталей и снизит брак отливок.The proposed sample improves the accuracy of determining the burn-up resistance of cast alloys and steels when casting in ceramic molds, since it eliminates the influence of the ceramic mold on the formation of hot cracks, which allows choosing more optimal melting and casting modes for casting alloys and steels and reduces casting rejects.

Claims (1)

Формула изобретени  Технологическа  проба дл  определени  гор челомкости литейных сплавов и стали, содержаща  тонкостенную цилиндрическую втулку с реЬром, выполненным по ее высоте на внутренней поверхности, о т - ли чающа с  тем, что, с целью повышени  точности определени  гор челомкости литейных сплавов и сталей путем исключени  вли ни  прочностных характеристик керамической формы на образование гор чих трещин, во втулке выполнен разрез по всей высоте..SUMMARY OF THE INVENTION A process sample for determining the flare resistance of cast alloys and steel, comprising a thin-walled cylindrical sleeve with a flange made according to its height on the inner surface, in order to increase the accuracy of determining the flare resistance of cast alloys and steels by to exclude the influence of the strength characteristics of the ceramic mold on the formation of hot cracks, a cut along the entire height is made in the sleeve.
SU4911637 1991-02-15 1991-02-15 Sampler for hot-shortness testing of casting alloys and steel RU1811964C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU4911637 RU1811964C (en) 1991-02-15 1991-02-15 Sampler for hot-shortness testing of casting alloys and steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU4911637 RU1811964C (en) 1991-02-15 1991-02-15 Sampler for hot-shortness testing of casting alloys and steel

Publications (1)

Publication Number Publication Date
RU1811964C true RU1811964C (en) 1993-04-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
SU4911637 RU1811964C (en) 1991-02-15 1991-02-15 Sampler for hot-shortness testing of casting alloys and steel

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RU (1) RU1811964C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101954455A (en) * 2010-10-14 2011-01-26 安徽应流集团霍山铸造有限公司 Method for removing heat cracks of framed-structure casting
CN103551505A (en) * 2013-10-31 2014-02-05 贵州安吉航空精密铸造有限责任公司 Method for detecting and improving quality of precision casting mold

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Авторское свидетельство СССР № 1245405, кл. Б 22 D 2/00, 1984. *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101954455A (en) * 2010-10-14 2011-01-26 安徽应流集团霍山铸造有限公司 Method for removing heat cracks of framed-structure casting
CN103551505A (en) * 2013-10-31 2014-02-05 贵州安吉航空精密铸造有限责任公司 Method for detecting and improving quality of precision casting mold

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