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thick film lubrication

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Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004032
EISBN: 978-1-62708-185-6
... Abstract This article lists functions of lubricants common to the majority of applications and processes. It discusses the lubricant candidates widely used in forging: conversion coatings with soaps (stearate compounds) and molybdenum disulfide for cold forging; oil-based thick, film oil or...
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006016
EISBN: 978-1-62708-172-6
... details postcoating application quality requirements, including measuring of dry-film thickness, assessing intercoat cleanliness, verifying minimum and maximum recoat intervals, performing holiday/pinhole detection, conducting cure/hardness testing, and assessing adhesion of the applied coating system...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003177
EISBN: 978-1-62708-199-3
... sheet metal. In sheet metal forming, several different lubrication regimes have been identified ( Fig. 5 ). Fig. 5 Three lubrication regimes experienced in sheet metal forming. (a) Thick-film lubrication. (b) Thin-film lubrication. (c) Boundary lubrication Thick-film...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004005
EISBN: 978-1-62708-185-6
... copper plating 7.5 to 18 μm (0.3 to 0.7 mils) thick as a lubricant carrier. Copper plating may also be used on the chromium-containing alloys 600 and 800, but oxalate coatings serve as an adequate substitute. Regardless of the type of carrier, a base lubricant is best applied by drawing it on in a...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003104
EISBN: 978-1-62708-199-3
... lubrication is sufficient to prevent any contact between asperities. Bearing friction is proportional to fluid viscosity and surface velocity. Minimum film thickness is proportional to viscosity and surface velocity. Hydrodynamic lubrication is also called “thick film” and “fluid filmlubrication...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003030
EISBN: 978-1-62708-200-6
... of 1.29 cm 2 (0.20 in. 2 ) is rotated under load against a stationary steel washer. Test duration is selected to give at least 0.1 mm (0.004 in.) of wear; typical test durations are in the range of 50 to 4000 h. The wear rate is calculated from change in thickness. This test is an American National...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004006
EISBN: 978-1-62708-185-6
... thickness, and the metal is forced to take an increasingly radial flow path. The idealized curves in Fig. 3 assume a relatively constant billet temperature and a constant ram speed after initial acceleration. Fig. 3 Idealized ram displacement versus load curves for nonlubricated extrusion processes...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001286
EISBN: 978-1-62708-170-2
... the greater thermal expansion. Film stress can change with film thickness. Stress gradients can exist in the deposited film due to the growth mode and differing thermal histories of the various layers of the film. These stresses can give the outermost layer of the film a tensile stress compared to...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001276
EISBN: 978-1-62708-170-2
... and equipment Thin film, easily removable when dry; solvent cutback Corrosion protection of food-handling equipment MIL-C-11796  Classes 1 and 1 A (a) Corrosion-preventive compound, petrolatum, hot application Thick, nondrying, dark, firm, grease-like film; leaves oil slick on salt water...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003015
EISBN: 978-1-62708-200-6
... the mandrel. The air contained in the bubble cannot escape because it is sealed by the die at one end and by the nip (or pinch) rolls at the other. Thus, it acts like a permanent shaping mandrel once it has been injected. An even pressure of air is maintained to ensure uniform thickness of the film...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001322
EISBN: 978-1-62708-170-2
.... Electroplated cadmium coatings are typically applied at thicknesses of between 5.1 and 12.7 μm (0.2 and 0.5 mil) ( Ref 1 ). Chromate treatments (based on hazardous chromic acid) are frequently applied to cadmium coatings as a final passivation process. Cadmium coatings have historically provided effective...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003181
EISBN: 978-1-62708-199-3
... thickness. Materials for small dies are chosen almost entirely on the basis of performance, but cost becomes a significant factor for large dies. Local variation in wear on tools is an important factor in tool life. A twentyfold variation in rate of wear can be observed on the die radius. Lubricants...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003180
EISBN: 978-1-62708-199-3
... material is most formable at 95 to 205 °C (200 to 400 °F). Forming at lower temperatures may crack it. Fig. 5 Effect of temperature on the formability of Mo-0.5Ti sheet, as indicated by ratio of bend radius to sheet thickness The types of lubricants used in the forming of refractory metals...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003053
EISBN: 978-1-62708-200-6
... cost-effective, lower-quality substrates, such as 96% alumina, for thick-film processing. It produces tapes that sinter flatter, with more uniform shrinkage. Its disadvantages, compared to tape casting, are that: A spray dryer is necessary if the process is not located in a conventional...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003983
EISBN: 978-1-62708-185-6
... inside and outside diameters or an increase in wall thickness The production of a taper The conditioning of weld beads for subsequent tube drawing Increased strength Close tolerances A laminated tube produced from two or more tubes The usual limit on the diameter of tubes that can be...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003178
EISBN: 978-1-62708-199-3
... 54 2 1 8 60 2 3 8 … … (a) Radii can be slightly less for a 90° bend, but must be slightly larger for 360°. (b) Ratio of outside diameter to wall thickness of tubing Table 1 Typical lubricants for bending various metals Work metal Lubricant Low...
Book Chapter

Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003987
EISBN: 978-1-62708-185-6
... life of the dies. Overloading may be prevented by the use of overload release devices, and many presses are equipped with such devices. However, the usual means for preventing overloading in presses is careful control of workpiece thickness, which must be sufficient to allow acceptable coining, but...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004004
EISBN: 978-1-62708-185-6
... for combining forward-backward extrusion and multiple extrusion operations ( Ref 6 , Ref 7 , Ref 8 , Ref 9 , Ref 10 ): Backward extrusions should have a minimum reduction of 20 to 25% and a maximum of 70 to 75%. Bottom thickness during backward extrusion should not be less than 1 to 1.5...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004000
EISBN: 978-1-62708-185-6
... titanium alloys. Dies for titanium alloys may be up to 50% thicker in terms of sidewall thickness and die wall thickness below the die cavity for the same die cavity depth and severity of die impression than those used for alloy steels or aluminum. Without this increase in sidewall and/or below-cavity...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003184
EISBN: 978-1-62708-199-3
... successive forging operations. Grit blasting is a reasonably effective method of removing this oxide layer, which can vary in thickness from 0.13 to 0.76 mm (0.005 to 0.030 in.). The blasting is done with zircon sand (100 to 150 mesh) at an air pressure of 275 kPa (40 psi), although other types of grit...