{"id":47523,"date":"2025-06-17T10:00:52","date_gmt":"2025-06-17T08:00:52","guid":{"rendered":"https:\/\/www.bonomiacciai.it\/?p=47523"},"modified":"2025-06-25T17:36:02","modified_gmt":"2025-06-25T15:36:02","slug":"precautions-for-the-die-maker","status":"publish","type":"post","link":"https:\/\/www.bonomiacciai.it\/en\/precautions-for-the-die-maker\/","title":{"rendered":"Heat Treatments: Preliminary Precautions for the Die Maker"},"content":{"rendered":"
[vc_row][vc_column][vc_column_text css=””]Before submitting a die to heat treatments, the die maker should adopt a series of preliminary precautions to prevent structural defects and ensure maximum component performance.
\nDefects such as cracking, distortion, and rupture can be avoided through careful design and conscious machining.<\/p>\n

Below are the main aspects to consider.[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column]

<\/div>[\/vc_column][\/vc_row][vc_row][vc_column][vc_custom_heading text=”Sharp Edges” use_theme_fonts=”yes” css=””][vc_empty_space height=”16px”][vc_column_text css=””]Sharp edges are areas of high stress concentration and represent critical points for crack initiation during heat treatment. Edges should be radiused or chamfered wherever possible.[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_single_image image=”47373″ add_caption=”yes” onclick=”img_link_large” css=””][\/vc_column][\/vc_row][vc_row][vc_column]
<\/div>[\/vc_column][\/vc_row][vc_row][vc_column][vc_custom_heading text=”Welds” use_theme_fonts=”yes” css=””][vc_empty_space height=”16px”][vc_column_text css=””]\n
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Welds may conceal internal defects such as microcracks and blowholes. It is essential to clearly identify welded areas and perform dye penetrant inspection before heat treatment.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_single_image image=”47371″ add_caption=”yes” alignment=”center” onclick=”img_link_large” css=””][\/vc_column][\/vc_row][vc_row][vc_column]

<\/div>[\/vc_column][\/vc_row][vc_row][vc_column][vc_custom_heading text=”Stepped Milling” use_theme_fonts=”yes” css=””][vc_empty_space height=”16px”][vc_column_text css=””]\n
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Stepped milling creates sharp transitions that may act as stress risers and crack initiation zones. Where possible, these should be replaced by smooth radiused connections between surfaces.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_single_image image=”47369″ add_caption=”yes” alignment=”center” onclick=”img_link_large” css=””][\/vc_column][\/vc_row][vc_row][vc_column]

<\/div>[\/vc_column][\/vc_row][vc_row][vc_column][vc_custom_heading text=”Forging Draft Witnesses” use_theme_fonts=”yes” css=””][vc_empty_space height=”16px”][vc_column_text css=””]\n
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Unmachined surfaces from the forged block may retain scale, hot-work defects, or structural anomalies. All surfaces should be properly machined to avoid weak points.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_single_image image=”47363″ add_caption=”yes” alignment=”center” onclick=”img_link_large” css=””][\/vc_column][\/vc_row][vc_row][vc_column]

<\/div>[\/vc_column][\/vc_row][vc_row][vc_column][vc_custom_heading text=”Electrical Discharge Machining (EDM)” use_theme_fonts=”yes” css=””][vc_empty_space height=”16px”][vc_column_text css=””]\n
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EDM generates an altered surface layer (white layer) that is non-uniform and may contain microdefects. Polishing of machined areas is recommended, along with a preliminary stress-relieving cycle and double dye penetrant inspection\u2014before and after quenching.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_single_image image=”47381″ add_caption=”yes” alignment=”center” onclick=”img_link_large” css=””][\/vc_column][\/vc_row][vc_row][vc_column]

<\/div>[\/vc_column][\/vc_row][vc_row][vc_column][vc_custom_heading text=”Cooling Holes” use_theme_fonts=”yes” css=””][vc_empty_space height=”16px”][vc_column_text css=””]\n
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The bottom of cooling holes should be rounded. Pointed geometries concentrate stress and are potential crack initiation sites.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_single_image image=”47365″ add_caption=”yes” alignment=”center” onclick=”img_link_large” css=””][\/vc_column][\/vc_row][vc_row][vc_column]

<\/div>[\/vc_column][\/vc_row][vc_row][vc_column][vc_custom_heading text=”Close-Spaced Holes” use_theme_fonts=”yes” css=””][vc_empty_space height=”16px”][vc_column_text css=””]\n
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Holes that are too close together cause uneven wall thickness, leading to varying thermal gradients during quenching. This imbalance increases the risk of cracking between holes.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_single_image image=”47367″ add_caption=”yes” alignment=”center” onclick=”img_link_large” css=””][\/vc_column][\/vc_row][vc_row][vc_column]

<\/div>[\/vc_column][\/vc_row][vc_row][vc_column][vc_custom_heading text=”Conclusion” use_theme_fonts=”yes” css=””][vc_empty_space height=”16px”][vc_column_text css=””]\n
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The effectiveness of a heat treatment depends not only on the material quality and the thermal cycle applied, but also on the component’s design and preparation.<\/p>\n

At Bonomi Acciai<\/strong><\/a>, representatives of Swiss Steel Group<\/strong><\/a>, we support engineers and die makers in the continuous improvement of manufacturing processes, helping prevent failures and maximise the performance of special steels.<\/p>\n

Contact us for a dedicated technical consultation.<\/strong><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row full_width=”stretch_row_content” css=”.vc_custom_1717678542423{background-color: #ebebeb !important;}” visibility=”hidden-phone”][vc_column]

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