case hardening process pdf

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0000020338 00000 n H�\�͊�@��y�Zv/��ԭ{[��\���hR:�1��^��S�N�#h>M��U�f��������9�ɝ�����>6ѝ�닪vm�L��gs=EZ{xܧx���[�X��G�w�Ƈ{Z��S|.�ocǮ���_�ó+���'^c?��[.]�E��r��ѕy�˾M������{��c����+�4�6އc�c��b�^K�إײ�}��}S. 0000370024 00000 n �~H��u}�|ܭ�����4n>>nK���ԵKć�e~��m7��s�~��0���=���]z�Oӟp ��2�ٸ.�cЗf��\�K�m/�.>��K��o���\���i�.ܦ� s3\BRg�ڸ�=^�$�ϥ�ӹ���I]`q�ş�;��'��o��%חX_���d����W����d���r.�%ؓ=X�f]���u=�z����+rf�=z��ѣg�=z�y� ��+�x 0000303917 00000 n LOO�B�M��t8��������G� p��:�YAV�#�!�g�r&=�BO���vA��D~�炞k�"칠�ºu)����_��W�+��J���_��W�+��J���_��W�W��"��{U��_Y2�+�pQ,�=y�����o�!đ_^�e�1�����i�LL�| 0 8��7 Makers of tapered roller bearings recognized the need to lessen the problem of brittleness and possible fracture. 0000011856 00000 n 8620 is a low nickel - chromium - molybdenum medium hardenability, case hardening (carburizing) steel, generally supplied in the as rolled condition with a maximum brinell hardness of 280 (Rc30).Characterised by good core strength and toughness in small to medium sections with case hardness up to Rc62 when carburized, hardened and tempered.8620 can =�BO���S�)�x

0000013805 00000 n 0000039716 00000 n H��W[��F~��У �Vs�H4�4)���a[¬������}d(%K�����9��.�( �'&4�) =�%�gQ0�#��f���ϺR�y�me��]c�1���`��>d���|^� H�\�ˊ�@E���^�,���F ƞ/� N>@�ڎ ��,/���;L �GV��S�:����_\�}�cXܹ�9����w H�\��j�0����l/����L MZ�E�e�� �����6�s����O���t�o�q��mwC?��W۽�ͱ��/�5������0]���O�w{n�$����2��n8�I]��w\���f���x��I�:��d��n��&�_��ӟ�0�̬V���x�k3�5go�%����z?�b�ߎ?�ɛby�)ӎ��LM�C3�|Rg�Z��%^����`�pl?���6gY�Evdސ7�-y~&?G.�-�-sr.�ؒ-X� Hardening of carburized layers takes place in … Induction heating is used in a variety of heat treatmentprocesses,suchasannealing,normaliz-ing, surface (case) hardening, through hardening, 0000004267 00000 n 0000365702 00000 n The carburization process depending on the grade of steel is carried out in the temperature range of about 880 - 1050 ℃. 66 0 obj <>stream 0000035800 00000 n

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When heat-treated, the high-carbon surface responds to hardening, and the core toughens. 0000006209 00000 n 0000007015 00000 n 0000010021 00000 n

But in the case of case hardening, only the outer surface is heat-treated to make it hardened. In case hardening, you change the surface of the metal chemically by introducing a high carbide or nitride content. =�BO���M��W�+���|E�2_���W�+���|E�r�9(k�Z�sP�A9��sP�A9��s0���i�4zO�����i�4zO�����i�_d�ʲr�Z���r}�?�f���T�ϳ���9����'�������]�$ ���k 0000021594 00000 n 0000016771 00000 n 0000002509 00000 n Case hardening or surface hardening is a hardening heat-treatment process.

0000003992 00000 n Newly manufactured parts made from low-carbon steels like 1018, 1020, 1022, 1117, or … U�8U۠�A�. startxref 0000299595 00000 n 0000017005 00000 n 0000015909 00000 n 0000007292 00000 n 0000064788 00000 n CARBURIZING. 0000006165 00000 n

Case Hardening or Surface Hardening.

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0000019459 00000 n In this process, the steel is quenched directly after carburizing from the already heated state. 0000003035 00000 n 0000132114 00000 n 65 0 obj<>stream 0000075898 00000 n 0000002020 00000 n

0000015952 00000 n h�b``a``9����f��A�@b@������H2�N��'؜ym�|��� %(��R 0000076461 00000 n Case hardening is the process of hardening just …

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0000023021 00000 n 0000017740 00000 n xref The process of adding carbon to the surface of mild steel or iron as a means of making it harder has been with us for a very long time, at least for a thou- ... of parts make ideal candidates Oncefor re-case hardening. 0000016247 00000 n t}� r�� process involves a complex combination of elec-tromagnetic and heat transfer phenomena, as described in more detail in the article “Principles of Induction Heating” in this Volume. 0000030298 00000 n 0 0000001562 00000 n

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0000071047 00000 n Carbon is added to the outer surface of the steel, to a depth of approximately 0.03mm. 0000071069 00000 n 0000015974 00000 n In the case of hardening, the complete metal piece is heated. 0000000016 00000 n 0000004543 00000 n 0000006848 00000 n 0000007277 00000 n PDF FILE - CLICK HERE FOR PRINTABLE WORKSHEET Case hardening is a simple method of hardening steel. 0000045266 00000 n It is less complex than hardening and tempering. 0000133871 00000 n Subsequent hardening process for the core is 880-920 ℃, which can be done immediately after carburizing. 0000003003 00000 n endstream endobj 39 0 obj <> endobj 40 0 obj <>stream 0000003062 00000 n

0000130985 00000 n 0000134135 00000 n 0000011878 00000 n 8.1 Purpose of Case Hardening Case hardening is defined as a process by which a ferrous material is hardened in such a manner that the surface layer, known as the case, becomes substantially harder than the remaining material, known as the core.

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The process of case-hardening, however, increases the carbon content at the surface of 0000039694 00000 n The core remains chemically unaffected. 0000001579 00000 n 0000045133 00000 n The inner metal is still soft and ductile. 0000006743 00000 n 0000295273 00000 n Direct hardening is a special case hardening process. 0000043085 00000 n xref 21 0 obj <> endobj 0000132394 00000 n The main aim of this process is to make the only external surface of steel hard and inner core soft. ;���DZXT��p=Y�yV��� 3+Y�F6�+���%o�o�7���$~�9]W� Q��4u%�N� 8. 0000006959 00000 n

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