1-20 of 635 Search Results for

surface hardness

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310079
EISBN: 978-1-62708-326-3
... steels with varying amount of martensite. At a given carbon level, the maximum attainable hardness is with 100% martensite, which may only be possible at the surface or within the section of a small steel specimen. Cooling rates within larger sections may not be rapid enough to result in 100% martensite...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310331
EISBN: 978-1-62708-326-3
... hardness and strength Through hardening: heating, quenching, and tempering to provide the highest possible hardness and strength Surface hardening: flame, induction, or laser heating the surface of a casting to increase its wear resistance Most iron-casting producers would like to produce...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310233
EISBN: 978-1-62708-326-3
... surface hardening. Finally, some special considerations for stainless steel castings are discussed. austenitic stainless steel composition duplex stainless steel ferritic stainless steel heat treatment martensitic stainless steel precipitation-hardening stainless steel wrought stainless steel...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310203
EISBN: 978-1-62708-326-3
... proper steel, one should check the hardness chart (e.g., Table 8 in Chapter 2 ) for the carbon range that will give the required surface hardness. The hardenability effect of carbon does not substantially alter this rule. The next step is determining the necessary cooling rates and the hardenability of...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310163
EISBN: 978-1-62708-326-3
... treating shop for successfully selecting the batch or continuous furnace tempering temperatures for various steels, either furnace treated or induction hardened. To use the table, first check five pieces for surface hardness in the as-quenched condition. Then average and record the HRC hardnesses. Then...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310285
EISBN: 978-1-62708-326-3
... appreciable hardness and ability to cut. Tools such as twist drills and countersinks, milling cutters, turning tools, boring tools, broaches, and saw blades are just a few examples of such applications. The tool steels used for cutting tool applications are usually heat treated to very high hardness...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.9781627083263
EISBN: 978-1-62708-326-3
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310127
EISBN: 978-1-62708-326-3
... produced on the surface. This process is sometimes referred to as box annealing. Blue annealing In this process, hot rolled ferrous sheet is heated in an open furnace to a temperature within the transformation range and then cooled in air. The formation of a bluish oxide on the surface is incidental...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310095
EISBN: 978-1-62708-326-3
... be produced in the surface layers by drastic quenching. This practice is sometimes termed “shell hardening” because a very hard shell is produced on the outside of the workpiece, while the subsurface layers are relatively soft because they were not cooled fast enough to exceed the critical cooling...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310055
EISBN: 978-1-62708-326-3
... for this process exhibit boiling temperatures between 100 and 300 °C (212 and 570 °F) at atmospheric pressure. When steel is quenched at these temperatures, the rewetting of the surface is usually time-dependent, which influences the cooling process and achievable hardness. An example of a typical...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310001
EISBN: 978-1-62708-326-3
... and alloys. Grain boundaries, as well as other microstructural features, are often observed by a process of specimen preparation known as metallography . This process involves polishing the surface of a metal specimen and then lightly etching it with an appropriate acid solution. The etching process...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310351
EISBN: 978-1-62708-326-3
... grain formation Promoting grain growth Dissolving phases Producing new phases, by precipitation from solid solution Altering surface chemistry by the introduction of foreign atoms Promoting new phase formation through the introduction of foreign atoms One common heat treating...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310029
EISBN: 978-1-62708-326-3
..., and fracture of steels. Cementite is very hard, ranging in hardness from 800 to 1400 HV, depending on the substitution of elements for iron. Heat treatment also can alter the amount, shape, and distribution of the hard cementite particles in the microstructure of steel. For example, the hard...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050245
EISBN: 978-1-62708-311-9
... Abstract This chapter discusses the methods and procedures used for inspecting induction-hardened parts. It provides information on hardness and case depth measurements, nondestructive testing and surface analysis, the effect of various hardening errors, and relevant test standards. case...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050191
EISBN: 978-1-62708-311-9
... machining and balancing. Figure 10.1 shows the two typical hardness patterns produced in induction hardening crankshaft journals. Figure 10.1(a) presents the hardness pattern on the journal surface. Figure 10.1(b) illustrates the hardness extended into the adjacent fillets. Induction hardening...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050093
EISBN: 978-1-62708-311-9
...). Heating is done in a carbonaceous environment (liquid, solid, or gas). This raises the carbon content at the surface, producing a carbon gradient extending inward from the surface. The surface layers can then be hardened to a high hardness either by quenching from the carburizing temperature or by cooling...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050215
EISBN: 978-1-62708-311-9
... the carbon content for a particular alloy, the J1 hardenability hardness (at 1.5 mm, or 1 16 in.) is a good indication of the surface hardness to which an alloy with a good prior microstructure will quench. Chapter 5, “Heat Treating Basics,” in this book discusses in detail that the...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050155
EISBN: 978-1-62708-311-9
... tempering STEELS ARE TEMPERED to obtain specific values of mechanical properties, to relieve quenching stresses, and to ensure dimensional stability. The highest hardness produced for any given steel without any other surface process is obtained by quenching to a fully martensitic microstructure. The...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050263
EISBN: 978-1-62708-311-9
... is not caused by a defect in the material. Most of the time the nonconformance will occur when one or more of the heat-treatment specifications are not be met, as in the case of low surface hardness, wrong case depth, cracks, surface defects, and distortion. High surface hardness is not considered a...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050175
EISBN: 978-1-62708-311-9
... the type of steel. Figure 9.1(a) and (c) show two examples of decarburization. Figure 9.1(a) shows surface decarburization and the increase in surface hardness, with hardness readings taken from the surface inward. Figure 9.1(c) shows the completely ferritic surface layer in a commercial 1.0...