Abstract:
A sliding member for a compressor includes a base metal, a first layer and a second layer. The base metal is made of an aluminum-based metal. The first layer is formed on or over the base metal and made of a nickel-based plating layer containing at least one material of nitrogen (N), silicon (Si), titanium (Ti), chromium (Cr) and aluminum (Al) as an additive. The second layer is formed on the surface of the first layer and made of a diamond-like carbon layer containing the same additive as the additive contained in the first layer.
Abstract:
A wind turbine rotor (108) includes a first portion (160) of a shaft (134) fabricated from a first steel alloy having a first strength property value. The wind turbine rotor also includes a second portion (170) of the shaft fabricated from a second steel alloy having a second strength property value. The first strength property value is greater than the second strength property value. The second portion of the shaft is welded to the first portion of the shaft.
Abstract:
A variable displacement compressor optionally varies displacement based upon pressure in a crank chamber for adjusting the pressure in the crank chamber by varying an opening degree of a passage that interconnects the crank chamber and one of relatively high and low pressure regions of the refrigeration cycle. A control valve of the variable displacement compressor has a valve seat and a valve. The valve seat has a seat surface for adjusting the opening degree of the passage. The valve has a valve surface for adjusting the opening degree of the passage. At least one of the seat surface and the valve surface is made of a material with relatively high hardness.
Abstract:
Aushärtende Nickel-Chrom-Eisen-Titan-Aluminium-Knetlegierung mit sehr guter Verschleißbeständigkeit, bei gleichzeitig guter Kriechbeständigkeit, guter Hochtemperaturkorrosionsbeständigkeit und guter Verarbeitbarkeit mit (in Masse-%) >18 bis 31 % Chrom, 1,0 bis 3,0 % Titan, 0,6 bis 2,0 % Aluminium, >3,0 bis 40 % Eisen, 0,005 bis 0,10 % Kohlenstoff, 0,0005 bis 0,050 % Stickstoff, 0,0005 bis 0,030 % Phosphor, max. 0,010 % Schwefel, max. 0,020 % Sauerstoff, max. 0,70 % Silizium, max. 2,0 % Mangan, max. 0,05 % Magnesium, max. 0,05 % Kalzium, max. 2,0 % Molybdän, max. 2,0 % Wolfram, max. 0,5 % Niob, max. 0,5 % Kupfer, max. 0,5 % Vanadium, bedarfsweise 0 bis 15 % Co, bedarfsweise 0 bis 0,20 % Zr, bedarfsweise 0,0001 bis 0,008 % Bor, Rest Nickel und den üblichen verfahrensbedingten Verunreinigungen, wobei der Nickel-Gehalt größer 35 % ist, wobei die Beziehung Cr + Fe + Co > 25 % (1) erfüllt sein muss, um eine gute Verschleißbeständigkeit zu erreichen und die Beziehung fh > 0 (2a) mit fh = 6,49 + 3,88 Ti + 1,36 AI - 0,301 Fe + (0,759 - 0,0209 Co) Co - 0,428 Cr - 28,2 C (2) erfüllt sein muss, damit eine ausreichende Festigkeit bei höheren Temperaturen gegeben ist, wobei Ti, AI, Fe, Co, Cr und C die Konzentration der betreffenden Elemente in Masse-% sind und fh in % angegeben ist.
Abstract:
Устройство предназначено для использования в области нефтепромыслового оборудования для плунжеров насосов высокого давления. Плунжер выполнен в виде стержня из конструкционной стали с цилиндрической рабочей поверхностью и заходными фасками. Рабочая поверхность стержня выполнена с кольцевой клиновидной расточкой с образованием участка под напыление глубиной от 0,02 до 2 мм, на который посредством газотермического, преимущественно высокоскоростного газопламенного напыления, нанесено металлокерамическое покрытие на основе одного из следующих материалов: WC/CoCr, WC/Ni, Cr 3 C 2 /NiCr, WC/Cr 3 C 2 /Ni с наноструктурированной составляющей. Участок под напыление составляет всю длину рабочей поверхности за исключением участков, прилегающих к заходным фаскам, величина каждого из которых по длине составляет не более 5 мм. Покрытие обеспечивает высокую прочность в агрессивной среде, защищает от коррозии.
Abstract:
Although modern diesel fuel formulations are intended to reduce emissions of diesel engines, at least some of those modern fuels tend to have relatively low lubricity levels. The control valve assemblies described herein help to minimize any increased wear that would otherwise result from the use of such low lubricity fuels by providing a valve element, a valve guide, and an insert. The valve element is received within the valve guide and is moveable between an open position and a closed position. The insert forms a first sealed interface and a second sealed interface with the valve element and the valve guide. When the valve element is in the closed position, both of the first sealed interface and the second sealed interface are engaged. When the valve element is in the open position, only one of the first sealed interface and the second sealed interface is engaged.
Abstract:
A ferrous cylinder liner (14) for use in diesel engines (10) having exhaust gas recirculation (EGR) is protected from corrosive attack from the EGR environment by first final machining the inner running surface of the liner (14) and thereafter plating the finished inner surface with a thin, non-porous, continuous coating of chromium which serves as a barrier to the EGR gases. The liner (14) is installed and used in its as coated condition with no post-coating finishing of the coated surface.