Boriding

<h2 id="methods">Methods</h2>
<p>Boriding can be achieved in several ways, but commonly the metal piece is packed with a boriding mixture and heating at 900 °C.  A typical boriding mixture consists of <a href="/facts/Boron_carbide/J15UuFPa">boron carbide</a> powder diluted with other refractory materials. The process converts some of the iron to <a href="/facts/Iron_boride/fKIGlKEb">iron boride</a>, consisting of two phases: FeB concentrated near the surface, and diiron boride (Fe2B).<a class="footnote-ref" id="fnref:2" href="#fn:2"><sup>2</sup></a>  Boride layer depths can range from 0.001 to 0.015 inches (25 to 381 μm) depending on base material selection and treatment.
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<h3>Materials</h3>
<p>It is often used on <a href="/facts/Steel/aN6qWo4H">steel</a>, but is applicable to a variety of alloys and <a href="/facts/Cermet/oczyzW6Y">cermet</a> materials.<a class="footnote-ref" id="fnref:3" href="#fn:3"><sup>3</sup></a><a class="footnote-ref" id="fnref:4" href="#fn:4"><sup>4</sup></a> A wide range of materials suitable for treatment including plain carbon steels, alloy steels, tool steels, nickel-based super alloys, cobalt alloys, and stellite.
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<h3>Properties conferred</h3>
<p>Boriding gives the material the following desirable properties: wear resistance, improved hardness (1300–2000HV is possible), thermal stability, resistance to <a href="/facts/Corrosion/lIC7H4we">corrosion</a> by acids, reduced coefficient of friction, and increased galling/cold-welding resistance. It is possible to combine boriding with other heat treatments such as carburizing, hardening, or induction hardening to create deeper wear layers or high core hardness.
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<h2 id="see-also">See also</h2>
<ul><li><a href="/facts/Boron_steel/89DWncQ9">Boron steel</a></li></ul>

<h2 id="further-reading">Further reading</h2>
<ul><li>Matuschka, Alfred (1980). <a href="https://books.google.com/books?id=c_5TAAAAMAAJ"><i>Boronizing</i></a>. Hanser. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 9783446131767.</li></ul>

<h2 id="references">References</h2>

<ol>
<li id="fn:1"><p>Helmut Kunst, Brigitte Haase, James C. Malloy, Klaus Wittel, Montia C. Nestler, Andrew R. Nicoll, Ulrich Erning and Gerhard Rauscher "Metals, Surface Treatment" in Ullmann's Encyclopedia of Industrial Chemistry, 2006, Wiley-VCH, Weinheim.  doi:10.1002/14356007.a16_403.pub2 <a href="/wiki/Doi_(identifier)" target="_blank">/wiki/Doi_(identifier)</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li>
<li id="fn:2"><p>Helmut Kunst, Brigitte Haase, James C. Malloy, Klaus Wittel, Montia C. Nestler, Andrew R. Nicoll, Ulrich Erning and Gerhard Rauscher "Metals, Surface Treatment" in Ullmann's Encyclopedia of Industrial Chemistry, 2006, Wiley-VCH, Weinheim.  doi:10.1002/14356007.a16_403.pub2 <a href="/wiki/Doi_(identifier)" target="_blank">/wiki/Doi_(identifier)</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li>
<li id="fn:3"><p>"Boriding – Bodycote PLC". Archived from the original on 2013-05-23. Retrieved 2012-12-28. <a href="https://web.archive.org/web/20130523161902/http://www.bodycote.com/services/heat-treatment/case-hardening-with-subsequent-hardening-operation/boriding.aspx" target="_blank">https://web.archive.org/web/20130523161902/http://www.bodycote.com/services/heat-treatment/case-hardening-with-subsequent-hardening-operation/boriding.aspx</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li>
<li id="fn:4"><p>"Ultrafast Boriding in High Temperature Materials Processing Industries" (PDF). eere.energy.gov. Retrieved 15 April 2024. <a href="https://www1.eere.energy.gov/manufacturing/intensiveprocesses/pdfs/ultra-fast_boriding.pdf" target="_blank">https://www1.eere.energy.gov/manufacturing/intensiveprocesses/pdfs/ultra-fast_boriding.pdf</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li>
</ol>

Boriding open-in-new

Boriding