RU2220219C1 - High-temperature antifriction material for coating - Google Patents
High-temperature antifriction material for coating Download PDFInfo
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- RU2220219C1 RU2220219C1 RU2002132027A RU2002132027A RU2220219C1 RU 2220219 C1 RU2220219 C1 RU 2220219C1 RU 2002132027 A RU2002132027 A RU 2002132027A RU 2002132027 A RU2002132027 A RU 2002132027A RU 2220219 C1 RU2220219 C1 RU 2220219C1
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Изобретение относится к области порошковой металлургии и может быть использовано при создании износостойких покрытий, имеющих при температуре до 1100oС пониженный коэффициент трения.The invention relates to the field of powder metallurgy and can be used to create wear-resistant coatings having at a temperature of up to 1100 o With a reduced coefficient of friction.
Известен высокотемпературный материал покрытия на основе никеля, содержащий хром, алюминий, иттрий, фторид кальция и стекло [1]. Known high-temperature coating material based on Nickel, containing chromium, aluminum, yttrium, calcium fluoride and glass [1].
Недостатком известного материала является неудовлетворительная жаростойкость и прочность при температурах, превышающих 980oС, что не позволяет его использовать в парах трения при температурах, превышающих 980oС.A disadvantage of the known material is poor heat resistance and strength at temperatures exceeding 980 o C, which does not allow it to be used in friction pairs at temperatures exceeding 980 o C.
Задачей предлагаемого изобретения является повышение жаростойкости и износостойкости высокотемпературного антифрикционного материала покрытия. The objective of the invention is to increase the heat resistance and wear resistance of high-temperature antifriction coating material.
Задача решается тем, что высокотемпературный антифрикционный материал покрытия на основе никеля, содержащий алюминий, фторид кальция и стекло, содержит указанные ингредиенты, взятые в следующем соотношении, мас.%: алюминий - 9,52-12,58, фторид кальция - 15-17, стекло - 15-17, никель - остальное. The problem is solved in that the high-temperature antifriction coating material based on nickel, containing aluminum, calcium fluoride and glass, contains these ingredients, taken in the following ratio, wt.%: Aluminum - 9.52-12.58, calcium fluoride - 15-17 glass - 15-17, nickel - the rest.
Предлагаемый материал в отличие от известного материала [1] не содержит хрома и иттрия и при этом легирован повышенным содержанием алюминия. The proposed material, unlike the known material [1] does not contain chromium and yttrium and is alloyed with a high aluminum content.
Хром и, в особенности иттрий, являются тугоплавкими элементами, и при формировании антифрикционного слоя они способствуют увеличению коэффициента трения, что ведет к преждевременному износу покрытия. Это объясняется тем, что при образовании матрицы защитного покрытия на основе алюминида никеля хром и иттрий образуют в слое включения с повышенной твердостью. Chrome and, in particular, yttrium, are refractory elements, and when the antifriction layer is formed, they contribute to an increase in the friction coefficient, which leads to premature wear of the coating. This is explained by the fact that during the formation of a protective coating matrix based on nickel aluminide, chromium and yttrium form in the inclusion layer with increased hardness.
Повышение жаропрочности и износостойкости достигается в предлагаемом материале за счет следующих факторов. The increase in heat resistance and wear resistance is achieved in the proposed material due to the following factors.
1. В предлагаемой концентрации алюминий способствует образованию алюминида никеля при напылении, обладающего высокой жаростойкостью, что обеспечивает применение предлагаемого материала вплоть до температуры 1100oС.1. In the proposed concentration, aluminum promotes the formation of nickel aluminide during spraying, which has high heat resistance, which ensures the use of the proposed material up to a temperature of 1100 o C.
2. Для того чтобы покрытие было сплошным и беспористым, в него введено стекло, которое при напылении заполняет поры и, кроме того, играет роль твердой смазки. При этом обеспечивается коэффициент трения, равный 0,3-0,4. 2. In order for the coating to be solid and non-porous, glass has been introduced into it, which during spraying fills the pores and, in addition, plays the role of a solid lubricant. This provides a coefficient of friction equal to 0.3-0.4.
3. Введением в состав материала фторида кальция обеспечивается снижение коэффициента трения и соответственно повышается долговечность и износостойкость предлагаемого материала. 3. The introduction of calcium fluoride into the material ensures a decrease in the coefficient of friction and, accordingly, the durability and wear resistance of the proposed material are increased.
4. Образующийся алюминид никеля определенного состава упрочняет защитный слой и повышает его пластические свойства. 4. The resulting nickel aluminide of a certain composition strengthens the protective layer and increases its plastic properties.
Сведения, подтверждающие возможность осуществления изобретения, заключаются в следующем. Information confirming the possibility of carrying out the invention are as follows.
Для получения антифрикционных высокотемпературных покрытий было изготовлено три состава смеси, мас.%:
1. Алюминий - 9,52; фторид кальция - 15; стекло - 15; никель - остальное.To obtain anti-friction high-temperature coatings, three mixture compositions were made, wt.%:
1. Aluminum - 9.52; calcium fluoride - 15; glass - 15; nickel - the rest.
2. Алюминий - 11,05; фторид кальция - 16; стекло - 16; никель - остальное. 2. Aluminum - 11.05; calcium fluoride - 16; glass - 16; nickel - the rest.
3. Алюминий - 12,58; фторид кальция - 17; стекло - 17; никель - остальное. 3. Aluminum - 12.58; calcium fluoride - 17; glass - 17; nickel - the rest.
Далее производили нанесение полученных покрытий методом плазменного напыления на образцы стали 1Х18 H10Т. Then, the obtained coatings were applied by plasma spraying onto samples of 1X18 H10T steel.
Наряду с предлагаемым покрытием на образцы этой же стали производилось нанесение покрытия известного состава [1]. Along with the proposed coating, samples of the same steel were coated with a known composition [1].
Результаты проверки свойств полученных слоев покрытий представлены в таблице. The results of checking the properties of the obtained coating layers are presented in the table.
Как видно из приведенных в ней результатов, предлагаемый высокотемпературный антифрикционный материал обладает более высокими защитными свойствами, чем ранее известные материалы. As can be seen from the results presented in it, the proposed high-temperature antifriction material has higher protective properties than previously known materials.
В предложенном материале за счет подбора определенной концентрации алюминия обеспечивается его высокая износостойкость и жаропрочность при температурах до 1100oС.In the proposed material due to the selection of a certain concentration of aluminum, its high wear resistance and heat resistance are provided at temperatures up to 1100 o C.
Источник информации
1. Патент РФ 2026400 C1, C 22 C 19/05, 1995.Sourse of information
1. RF patent 2026400 C1, C 22 C 19/05, 1995.
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| RU2002132027A RU2220219C1 (en) | 2002-11-28 | 2002-11-28 | High-temperature antifriction material for coating |
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| RU2002132027A RU2220219C1 (en) | 2002-11-28 | 2002-11-28 | High-temperature antifriction material for coating |
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