ch11_ppts_callister7e

ch11_ppts_callister7e - Chapter 11 - 1 ISSUES TO ADDRESS......

Info iconThis preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Chapter 11 - 1 ISSUES TO ADDRESS... How are metal alloys classified and how are they used? What are some of the common fabrication techniques? How do properties vary throughout a piece of material that has been quenched, for example? How can properties be modified by post heat treatment? Chapter 11: Metal Alloys Applications and Processing Chapter 11 - 2 Adapted from Fig. 9.24, Callister 7e . (Fig. 9.24 adapted from Binary Alloy Phase Diagrams , 2nd ed., Vol. 1, T.B. Massalski (Ed.-in-Chief), ASM International, Materials Park, OH, 1990.) Adapted from Fig. 11.1, Callister 7e . Taxonomy of Metals Metal Alloys Steels Ferrous Nonferrous Cast Irons Cu Al Mg Ti <1.4wt%C 3-4.5wt%C Steels <1.4 wt% C Cast Irons 3-4.5 wt% C Fe 3 C cementite 1600 1400 1200 1000 800 600 400 1 2 3 4 5 6 6.7 L austenite + L +Fe 3 C ferrite +Fe 3 C + L +Fe 3 C (Fe) C o , wt% C Eutectic: Eutectoid: 0.76 4.30 727C 1148C T (C) microstructure: ferrite, graphite cementite Chapter 11 - Taxonomy of Metals 3 Chapter 11 - 4 Based on data provided in Tables 11.1(b), 11.2(b), 11.3, and 11.4, Callister 7e . Steels Low Alloy High Alloy low carbon <0.25 wt% C Med carbon 0.25-0.6 wt% C high carbon 0.6-1.4 wt% C Uses auto struc. sheet bridges towers press. vessels crank shafts bolts hammers blades pistons gears wear applic. wear applic. drills saws dies high T applic. turbines furnaces V. corros. resistant Example 1010 4310 1040 4340 1095 4190 304 Additions none Cr,V Ni, Mo none Cr, Ni Mo none Cr, V, Mo, W Cr, Ni, Mo plain HSLA plain heat treatable plain tool austenitic stainless Name Hardenability + + ++ ++ +++ TS- + ++ + ++ EL + +---- ++ increasing strength, cost, decreasing ductility Chapter 11 - 5 Refinement of Steel from Ore Iron Ore Coke Limestone 3CO + Fe 2 O 3 2Fe +3CO 2 C + O CO 2 CO 2 + C 2CO CaCO CaO+CO 2 CaO + SiO 2 + Al 2 O 3 slag purification reduction of iron ore to metal heat generation Molten iron BLAST FURNACE slag air layers of coke and iron ore gas refractory vessel Chapter 11 - 6 Ferrous Alloys Iron containing Steels - cast irons Nomenclature AISI & SAE 10xx Plain Carbon Steels 11xx Plain Carbon Steels (resulfurized for machinability) 15xx Mn (10 ~ 20%) 40xx Mo (0.20 ~ 0.30%) 43xx Ni (1.65 - 2.00%), Cr (0.4 - 0.90%), Mo (0.2 - 0.3%) 44xx Mo (0.5%) where xx is wt% C x 100 example: 1060 steel plain carbon steel with 0.60 wt% C Stainless Steel-- >11% Cr Chapter 11 - 7 Cast Iron Ferrous alloys with > 2.1 wt% C more commonly 3 - 4.5 wt%C low melting (also brittle) so easiest to cast Cementite decomposes to ferrite + graphite Fe 3 C 3 Fe ( ) + C (graphite) generally a slow process Chapter 11 - 8 Fe-C True Equilibrium Diagram Graphite formation promoted by Si > 1 wt% slow cooling Adapted from Fig....
View Full Document

This note was uploaded on 02/20/2011 for the course MTL 300 taught by Professor Habiba during the Fall '10 term at Ryerson.

Page1 / 34

ch11_ppts_callister7e - Chapter 11 - 1 ISSUES TO ADDRESS......

This preview shows document pages 1 - 9. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online