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grinding cracks

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Published: 01 December 1999
Fig. 8.3 Examples of grinding cracks. (a) Cracks on the flank of a worm thread. (b) Micrograph of grinding cracks in case-hardened 8620 steel showing several small cracks (arrows at right) that extended through the hardened case to the core, and the burned layer on surface (dark band indicated More
Image
Published: 01 September 2008
Fig. 37 Example of grinding cracks on the flank of a worm gear. Source: Ref 85 More
Image
Published: 01 September 2008
Fig. 26 Grinding cracks on AISI 5160 steel cam shaft after induction hardening and low tempering (high-hardness tempering). Original magnification: 200× More
Image
Published: 01 September 2008
Fig. 12 Examples of grinding cracks. (a) Two views of an S1 tool cutter die cracked and spalled after grinding. As-received (left) and after magnetic particle testing (right), accentuating the cracks Source: Ref 9 . (b) A D2 die that cracked due to incorrect grinding (arrow indicates grinding More
Image
Published: 01 December 1999
Fig. 8.4 Grinding cracks on the flanks of a small spur gear wheel. More
Image
Published: 01 January 1998
Fig. 17-18 Failure of a high-carbon, high-chromium drawing die due to grinding cracks. Grinding cracks around the inner diameter were revealed by deep etching More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130285
EISBN: 978-1-62708-284-6
... are also provided. The cases covered are grinding cracks on steel cam shaft and transgranular and intergranular crack path in commercial steels. tempering steel mechanical test temper embrittlement hydrogen embrittlement liquid-metal embrittlement isothermal heat treatment grinding cracks...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130177
EISBN: 978-1-62708-284-6
..., dimensional stability, and generation of quenching and grinding cracks. They also include insufficient case hardness and improper core hardness, influence of surface carbon content and grain size, internal oxidation, structure of carbides, and inclusion of noncarbide. Details on micropitting, macropitting...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770199
EISBN: 978-1-62708-337-9
..., and the displacement of metal to form heaps at the sides of a furrow does not occur. Instead, for such materials, small cracks may radiate from the grinding furrow, even when grinding conditions are carefully controlled ( Ref 2 ). This cracking is attributed primarily to mechanical causes. If some of the heat...
Image
Published: 01 November 2019
Figure 39 Interferometer representation of a crack in the silicon during grind on a high warp strain part. More
Image
Published: 01 September 2008
Fig. 2 Large gear that cracked during grinding operations. Localized thermal gradients during grinding resulted in high residual stresses and eventual cracking. Temper etching (dilute nitric acid in water) revealed the presence of abusive grinding. More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 1998
DOI: 10.31399/asm.tb.ts5.t65900325
EISBN: 978-1-62708-358-4
... dimensions and to correct for dimensional changes caused by heat treatment. Even properly designed and heat-treated tools may create trouble, in the form of cracking or poor service, if improper grinding is applied after the hardening heat treatment. The grinding may generate enough localized heat by action...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130311
EISBN: 978-1-62708-284-6
..., with some advice for avoiding problems. Incorrect Grinding Hardenable steels are more prone to grinding cracks than low-carbon, low-alloy steels. Cold work tool steels and high-speed steels are the most sensitive tool steel grades to such problems due to the high hardness of as-quenched martensite...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.tb.msisep.t59220039
EISBN: 978-1-62708-259-4
... Abstract This chapter discusses the practices and procedures used to reveal and record macrostructural features such as hardening depth, weld thickness, crack size, porosity, hot folds, and machining and tooling marks. It provides information on sectioning, sample location, orientation, surface...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770171
EISBN: 978-1-62708-337-9
... and reducing the propensity of quenched carburized steels to burn and crack during surface grinding. The chapter includes numerous data plots and tables showing how the various treatments influence hardness, wear resistance, tensile properties, and fatigue and fracture behaviors. bending fatigue carbon...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2022
DOI: 10.31399/asm.tb.tstap.t56040055
EISBN: 978-1-62708-428-4
... appear discontinuous as the crack propagates in/out of the plane of view of the image. Debonding and TC cracking are possible artifacts of sectioning. Subsequent grinding and polishing steps may not remove the artifacts of sectioning. A unique artifact of a TBC TC initiates as horizontal cracking due...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2022
DOI: 10.31399/asm.tb.tstap.t56040030
EISBN: 978-1-62708-428-4
... for characterization via examination techniques, such as optical or electron microscopy. The process flow includes preliminary resin infiltration, sectioning, mounting, grinding, and polishing. To aid in the identification and resolution of common issues during subsequent specimen analysis, the article presents common...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050301
EISBN: 978-1-62708-311-9
... will produce lower Rockwell test readings than the hardness of the iron itself because of the graphite s effect in lowering average hardness. Microhardness is used to measure the hardness of iron in the matrix. grinding crack or burn. The pressure of a grinding wheel on a hardened part can produce intense heat...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.9781627083119
EISBN: 978-1-62708-311-9
Image
Published: 01 September 2008
Fig. 29 Large gear that showed evidence of cracking. (a) As-received gear. (b) Crack evident on gear face. (c) Region after temper etching showing evidence of abusive grinding More