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Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300079
EISBN: 978-1-62708-323-2
... Oil film separating two rubbing surfaces. D is the composite roughness of two mating surfaces Fig. 4.28 Oil film separation in (a) a plain bearing at rest, and (b) at sufficient operating speed; P, load Fig. 4.29 Scuffing on the rolling surface of a roller cam Fig. 4.30...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250019
EISBN: 978-1-62708-345-4
... the risk of scuffing. In addition, recommendations for lubricant selection, viscosity, and method of application are discussed. The chapter discusses in greater detail the applications of oil lubricant. Finally, a case history demonstrates how the tribological principles discussed in the chapter can...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250257
EISBN: 978-1-62708-345-4
... the characteristics of various fatigue failures. Then, it provides information on the modes of impact fractures, wear, scuffing, and stress rupture. Next, the chapter describes the causes of gear failures and discusses the processes involved in conducting the failure analysis. Finally, the chapter presents examples...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250311
EISBN: 978-1-62708-345-4
..., the chapter describes the test procedures for surface durability (pitting), root strength (bending), and scoring (or scuffing) testing. durability fatigue test gear failure gears mechanical testing residual stress rolling contact fatigue test single-tooth fatigue test single-tooth overload test...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770077
EISBN: 978-1-62708-337-9
..., HRC Bend strength, MPa Impact strength, MPa Impact fatigue strength, MPa 900 40 57 1500 2500 670 860 20 59 1420 2500 770 820 0 61 1390 2500 790 790 0 61 1250 2800 800 Source: Ref 23 Effect of retained austenite on the scuffing tendency of steel Table...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900193
EISBN: 978-1-62708-350-8
... are improved with the introduction of nitrogen and carbon. Scuffing Resistance Scuffing resistance means the resistance to wear on the metal surface. This is accomplished by changing the nature of the surface compound layer, which is also known as the white layer. The completed compound layer will form...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300121
EISBN: 978-1-62708-323-2
.... 5.13 Applicability of some friction tests Fig. 5.14 Mild wear (left side) and scuffing (right side) in a 1020 steel counterface after reciprocation versus 60 HRC 52100 steel in line contact Fig. 5.15 An oxide tribofilm starting to build on a hard versus hard steel reciprocating...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250293
EISBN: 978-1-62708-345-4
... generation cannot be controlled above a certain maximum viscosity (for a given oil). Breakdown of the oil film will occur when the gear tooth surface-equilibrium temperature has reached a specific value. The scuffing load limit of mating tooth surfaces is speed dependent. With increasing speed...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.9781627083157
EISBN: 978-1-62708-315-7
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770001
EISBN: 978-1-62708-337-9
... downgrading. However, within its safe range of application, the case shallowness provides good bending fatigue, contact fatigue, wear, and scuffing resistance. Carbon case hardening can be employed to achieve a wide range of effective case depths (up to greater than 4 mm) in a wide range of steels...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250155
EISBN: 978-1-62708-345-4
... that can be finish cut after hardening, thus eliminating costly finishing operations. Through-hardened gears also are found to be effective in applications susceptible to gear scuffing. It is claimed that profile conformance of through-hardened gears, because of their low surface hardness, reduces sliding...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.htgpge.t67320021
EISBN: 978-1-62708-347-8
... operations. Through-hardened gears also are found to be effective in applications susceptible to gear scuffing. It is claimed that profile conformance of through-hardened gears, because of their low surface hardness, reduces sliding friction and thereby helps to increase scuffing resistance. Overall...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2011
DOI: 10.31399/asm.tb.cfw.t52860065
EISBN: 978-1-62708-338-6
... is too close, the fiber scuffs laterally across the outer package surface, generally abrading and causing loose fiber. Additionally, the first guide should be on the horizontal centerline of the package to prevent falloff of wraps at the edges and to minimize scuffing. Fig. 6.12 Guide-to-package...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350043
EISBN: 978-1-62708-315-7
..., and rolling contact). Using this classification system, galling, scuffing, and scoring are not strictly considered forms of wear because material is not necessarily removed (it may instead be displaced to one side). Rather, these latter phenomena are referred to as “surface damage.” Source: Ref 1...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2022
DOI: 10.31399/asm.tb.tstap.t56040001
EISBN: 978-1-62708-428-4
... of wear, such as abrasion, erosion, and scuffing Heat insulation or conduction Prevention of oxidation and hot corrosion Electrical conduction or insulation Near-net-shape manufacturing Sealing Engineered emissivity Abradable coatings Decoration Thermal spray processes...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780259
EISBN: 978-1-62708-281-5
... of the SAR number is in the ranking of construction materials for use in pumping a particular slurry. Wear Tests for Elastomers ASTM D 1630-94, “Standard Test Method for Rubber Property—Abrasion Resistance (Footwear Abrader)” ( Ref 28 ), gives a quantitative measure of scuffing abrasion resistance...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.9781627083232
EISBN: 978-1-62708-323-2
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300001
EISBN: 978-1-62708-323-2
... areas) at 500× Fig. 1.6 Scoring of a stainless steel from rubbing contact with another steel part Fig. 1.7 Scuffing of a gear tooth Fig. 1.8 Wear of a cam follower. There was no step in the outside diameter when it was new. Major Concepts and Ideas in Tribology...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350183
EISBN: 978-1-62708-315-7
... nickel-phosphorus plating, ferritic nitrocarburizing, sulfurizing, and spark hardening Fig. 16 Compares the wear, scuffing, and spalling resistance of sheet-metal dies coated by the following surface-hardening processes: uncoated, nitrided, borided, nitrogen ion implanted, chrome plated, sulfurized...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350195
EISBN: 978-1-62708-315-7
... to running unlubricated. In lubricated systems under high load and at high speed (e.g., cams and tappets, piston bores and rings) there is still the possibility of scuffing. Is the Part Unlubricated yet There is a Need to Reduce Friction? For dry sliding it is important to specify the exact...