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The heat treatment is done to improve the machinability. [277 722 500 500 500] 0000010172 00000 n >> 0000003665 00000 n [666 722 610] startxref This results in a softer state which will be lesser soft than that produced by annealing. The stiffness, ductility, ultimate tensile strength, yield strength and hardness of the heat treated samples were observed from their stressstrain curve. [333 500 277 556 500 722]

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0000444633 00000 n >> The effect of various heat treatment operations (annealing, normalizing, tempering) on mechanical properties of 0.35% carbon steel was investigated. trailer << /Size 82 /Info 41 0 R /Root 44 0 R /Prev 1087372 /ID[<390ef117480ba149fd9e8e866fd26391><6fa2883b51c4836591f48bfb7caccbc5>] >> startxref 0 %%EOF 44 0 obj << /Pages 40 0 R /Type /Catalog /PageLabels 38 0 R /Metadata 42 0 R >> endobj 80 0 obj << /S 185 /L 304 /Filter /FlateDecode /Length 81 0 R >> stream [500 500 443 500 443 277 500 500 277] /Resources << endobj 0000012895 00000 n [556] 0000008973 00000 n 0 /Source (WeJXFxNO4fJduyUMetTcP9+oaONfINN4+d77yLfHKRkD1kOvBkbrdfIvB1o12l5PB9khgm8VtCFmyd8gIrwOjQRAIjPsWhM4vgMCV\ /FontDescriptor 85 0 R 29 0000003690 00000 n Promote uniformity of structure. 0000016303 00000 n The basic principles involved in the heat treat- ment of these materials are presented in simplified form. ����t����*���'�?+`���b���ɣ�:~T���qA�W�!=&�F�|b��qJ(&����u�e,e�".�o�J�m��������5_``�̙���';X�J��,D�� /Root 78 0 R /BaseFont /WGHBPS+ArialMT stream Normalizing mium 10 5.3. 0000001808 00000 n

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/Length 596 /ItalicAngle 0 /DescendantFonts [89 0 R] The process of heat treatment is carried out to change the grain size, to modify the structure of the material and to relive the stresses set up the material after hot or cold working. << >> 0000141610 00000 n >>

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8KvVF/K8lfD48ogbpTTQGHvbVkrR/ZOeNln/C8BGEg=) Usually by furnace cooling method, or isothermal in about 20 ℃ below Ar1 for a long time. stream 47

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Normalizing 11 5.3.Hardening 11 a.Effectofmass 11 5.4.Tempering 12 5.5Casehardening 13 a.Carburizing 13 b.Cyaniding 14 c.Carbonitriding 15 d.Nitriding 15 5.6.Surfacehardening 15 a.Inductionhardening 15 b.Flamehardening 16 5.7.Specialtreatments 16 a.Austempering 16 b.Martempering 16 c.Coldtreatment 16 6.Hardenability 17 7.Heattreatmentofcastirons 18 …

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(a) (b) Figure 2. x�]����0��~ [666] BASIC HEAT TREATMENT As Steelworkers, we are interested in the heat treat-ment of metals, because we have to know what effects the heat produced by welding or cutting has on metal. /DW 1000 /CapHeight 699

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%%EOF So let us learn more about what is heat treatment and what are the types of heat treatment in this article.

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