{"id":11855,"date":"2025-09-23T06:21:26","date_gmt":"2025-09-23T06:21:26","guid":{"rendered":"https:\/\/hlh-js.com\/?p=11855"},"modified":"2026-02-03T01:31:00","modified_gmt":"2026-02-03T01:31:00","slug":"shot-peening-process-industrial-surface-treatment-guide","status":"publish","type":"post","link":"https:\/\/hlh-js.com\/es\/resource\/blog\/shot-peening-process-industrial-surface-treatment-guide\/","title":{"rendered":"Shot Peening Process \u2013 Industrial Surface Treatment Guide"},"content":{"rendered":"<div class=\"container\">\n<article>\n<header>\n<h1>Shot Peening Process \u2013 Industrial Surface Treatment Guide<\/h1>\n<p class=\"note\"><strong>Primary keyword:<\/strong> <em>granallado<\/em> \u00b7 <strong>Secondary:<\/strong> <em>Almen intensity, fatigue improvement, surface treatment processes<\/em><\/p>\n<nav class=\"toc\" aria-label=\"\u00cdndice\"><strong>On this page:<\/strong><br \/>\n<a href=\"#intro\">Introduction<\/a><br \/>\n<a href=\"#mechanism\">Peening Mechanism<\/a><br \/>\n<a href=\"#equipment\">Equipment &amp; Shot Selection<\/a><br \/>\n<a href=\"#parameters\">Process Parameters<\/a><br \/>\n<a href=\"#almen\">Almen Testing &amp; Coverage<\/a><br \/>\n<a href=\"#pilot\">Pilot Protocol<\/a><br \/>\n<a href=\"#qc\">QC &amp; Metrics<\/a><br \/>\n<a href=\"#applications\">Applications &amp; Case Studies<\/a><br \/>\n<a href=\"#safety\">Safety Considerations<\/a><\/nav>\n<\/header>\n<section id=\"intro\">\n<h2>Introduction to Shot Peening<\/h2>\n<p>Shot peening is a cold working process that introduces compressive residual stress into metal surfaces, improving fatigue life, reducing stress corrosion cracking, and enhancing resistance to crack initiation. For an overview of how shot peening integrates into broader surface finishing workflows.<\/p>\n<figure><a href=\"https:\/\/hlh-js.com\/wp-content\/uploads\/2025\/09\/Shot-peening-machine-setup.png\"><img decoding=\"async\" class=\"lazyload aligncenter size-full wp-image-11857\" src=\"https:\/\/hlh-js.com\/wp-content\/uploads\/2025\/09\/Shot-peening-machine-setup.png\" data-orig-src=\"https:\/\/hlh-js.com\/wp-content\/uploads\/2025\/09\/Shot-peening-machine-setup.png\" alt=\"Shot peening machine setup\" width=\"292\" height=\"173\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%27292%27%20height%3D%27173%27%20viewBox%3D%270%200%20292%20173%27%3E%3Crect%20width%3D%27292%27%20height%3D%27173%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/hlh-js.com\/wp-content\/uploads\/2025\/09\/Shot-peening-machine-setup-18x12.png 18w, https:\/\/hlh-js.com\/wp-content\/uploads\/2025\/09\/Shot-peening-machine-setup-150x89.png 150w, https:\/\/hlh-js.com\/wp-content\/uploads\/2025\/09\/Shot-peening-machine-setup-200x118.png 200w, https:\/\/hlh-js.com\/wp-content\/uploads\/2025\/09\/Shot-peening-machine-setup.png 292w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 292px) 100vw, 292px\" \/><\/a><\/figure>\n<figure><div class=\"fusion-video fusion-youtube\" style=\"--awb-max-width:600px;--awb-max-height:360px;\"><div class=\"video-shortcode\"><div class=\"fluid-width-video-wrapper\" style=\"padding-top:60%;\" ><iframe title=\"Reproductor de v\u00eddeo YouTube 1\" src=\"https:\/\/www.youtube.com\/embed\/o_JgatQW3oE?wmode=transparent&autoplay=0\" width=\"600\" height=\"360\" allowfullscreen allow=\"autoplay; fullscreen\"><\/iframe><\/div><\/div><\/div><\/figure>\n<\/section>\n<section id=\"mechanism\">\n<h2>Peening Mechanism<\/h2>\n<p>High-velocity shots impact the component surface, creating plastic deformation pits. The surface layer undergoes compression while the subsurface experiences tensile stresses. Controlled compressive stress improves fatigue resistance significantly.<\/p>\n<p>Key outcomes:<\/p>\n<ul>\n<li>Increased fatigue strength by 20\u201350% depending on material and coverage<\/li>\n<li>Reduction of stress concentrators such as scratches and micro-notches<\/li>\n<li>Improved coating adhesion in subsequent surface treatments<\/li>\n<\/ul>\n<\/section>\n<section id=\"equipment\">\n<h2>Equipment &amp; Shot Selection<\/h2>\n<p>Types of equipment:<\/p>\n<ul>\n<li>Air blast peeners: high-pressure air propels shot<\/li>\n<li>Wheel blast peeners: rotating wheel accelerates shot<\/li>\n<li>Automated robotic peening systems for high-volume production<\/li>\n<\/ul>\n<p>Shot media selection:<\/p>\n<ul>\n<li>Steel shots (S110\u2013S230) for medium to high-strength steels<\/li>\n<li>Ceramic beads for aluminum alloys and sensitive substrates<\/li>\n<li>Size and hardness affect Almen intensity and surface coverage<\/li>\n<\/ul>\n<figure><figcaption><a href=\"https:\/\/hlh-js.com\/wp-content\/uploads\/2025\/09\/Different-shot-media-used-in-peening.png\"><img decoding=\"async\" class=\"lazyload aligncenter size-full wp-image-11858\" src=\"https:\/\/hlh-js.com\/wp-content\/uploads\/2025\/09\/Different-shot-media-used-in-peening.png\" data-orig-src=\"https:\/\/hlh-js.com\/wp-content\/uploads\/2025\/09\/Different-shot-media-used-in-peening.png\" alt=\"Different shot media used in peening\" width=\"450\" height=\"337\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%27450%27%20height%3D%27337%27%20viewBox%3D%270%200%20450%20337%27%3E%3Crect%20width%3D%27450%27%20height%3D%27337%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/hlh-js.com\/wp-content\/uploads\/2025\/09\/Different-shot-media-used-in-peening-16x12.png 16w, https:\/\/hlh-js.com\/wp-content\/uploads\/2025\/09\/Different-shot-media-used-in-peening-150x112.png 150w, https:\/\/hlh-js.com\/wp-content\/uploads\/2025\/09\/Different-shot-media-used-in-peening-200x150.png 200w, https:\/\/hlh-js.com\/wp-content\/uploads\/2025\/09\/Different-shot-media-used-in-peening-300x225.png 300w, https:\/\/hlh-js.com\/wp-content\/uploads\/2025\/09\/Different-shot-media-used-in-peening-400x300.png 400w, https:\/\/hlh-js.com\/wp-content\/uploads\/2025\/09\/Different-shot-media-used-in-peening.png 450w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 450px) 100vw, 450px\" \/><\/a><\/figcaption><\/figure>\n<\/section>\n<section id=\"parameters\">\n<h2>Process Parameters<\/h2>\n<ul>\n<li>Nozzle distance: 150\u2013300 mm<\/li>\n<li>Nozzle speed: 0.5\u20132 m\/s depending on part size<\/li>\n<li>Shot flow rate: 2\u201310 kg\/min (material dependent)<\/li>\n<li>Coverage target: \u226598% of critical surface<\/li>\n<li>Almen intensity: 0.10\u20130.40 mm A (adjust per spec)<\/li>\n<\/ul>\n<\/section>\n<section id=\"almen\">\n<h2>Almen Testing &amp; Coverage<\/h2>\n<p>Almen strips measure peening intensity. Place strips adjacent to components to calibrate process parameters. Coverage verification is done using visual inspection, dye penetrant, or replica tape methods. Proper documentation ensures reproducibility and compliance with fatigue specifications.<\/p>\n<\/section>\n<section id=\"pilot\">\n<h2>Pilot Protocol<\/h2>\n<ol>\n<li>Define component and fatigue targets (residual stress, Ra, coverage)<\/li>\n<li>Run sample batch (n=30\u201350 parts) under proposed parameters<\/li>\n<li>Measure Almen intensity and coverage<\/li>\n<li>Inspect dimensional change and surface quality<\/li>\n<li>Document results and adjust process as needed<\/li>\n<\/ol>\n<\/section>\n<section id=\"qc\">\n<h2>Quality Control &amp; Metrics<\/h2>\n<table>\n<thead>\n<tr>\n<th>Metric<\/th>\n<th>Unit<\/th>\n<th>Target<\/th>\n<th>Method<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Almen intensity<\/td>\n<td>mm A<\/td>\n<td>0.10\u20130.40<\/td>\n<td>Almen gauge<\/td>\n<\/tr>\n<tr>\n<td>Cobertura<\/td>\n<td>%<\/td>\n<td>&gt;=98<\/td>\n<td>Visual \/ dye penetrant \/ replica tape<\/td>\n<\/tr>\n<tr>\n<td>Dimensional change<\/td>\n<td>mm<\/td>\n<td>&lt;0.05<\/td>\n<td>CMM \/ calipers<\/td>\n<\/tr>\n<tr>\n<td>Surface roughness (Ra)<\/td>\n<td>\u03bcm<\/td>\n<td>0.5\u20132.0<\/td>\n<td>Profilometer<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/section>\n<section id=\"applications\">\n<h2>Applications &amp; Case Studies<\/h2>\n<p>1. Automotive steel springs: Almen intensity 0.20 mm A, coverage 99%, fatigue life increased by 35%.<\/p>\n<p>2. Aerospace aluminum landing gear components: Ceramic shot, 0.15 mm A, minimal surface distortion, improved coating adhesion.<\/p>\n<p>3. Industrial shafts: Wheel blast peening, steel shot, 0.25 mm A, reduced crack initiation under cyclic loading.<\/p>\n<\/section>\n<section id=\"safety\">\n<h2>Safety Considerations<\/h2>\n<ul>\n<li>PPE: respirator, gloves, eye protection<\/li>\n<li>HEPA-filtered ventilation to control dust and particles<\/li>\n<li>Regular machine maintenance to prevent nozzle or media hazards<\/li>\n<li>Proper storage and handling of shot media<\/li>\n<\/ul>\n<\/section>\n<footer>\n<p class=\"note\">For full context on integrating shot peening with cleaning, deburring, polishing, and other surface treatments, refer to the <a href=\"https:\/\/hlh-js.com\/resource\/blog\/surface-treatment-processes-comprehensive-guide-to-industrial-surface-finishing-techniques\/\" target=\"_blank\" rel=\"noopener\">surface treatment processes guide<\/a>.<\/p>\n<\/footer>\n<\/article>\n<\/div>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>Shot Peening Process \u2013 Industrial Surface Treatment Guide Primary keyword:  [&#8230;]<\/p>","protected":false},"author":1,"featured_media":11856,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[62,176],"tags":[],"class_list":["post-11855","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-process"],"_links":{"self":[{"href":"https:\/\/hlh-js.com\/es\/wp-json\/wp\/v2\/posts\/11855","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hlh-js.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hlh-js.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hlh-js.com\/es\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hlh-js.com\/es\/wp-json\/wp\/v2\/comments?post=11855"}],"version-history":[{"count":3,"href":"https:\/\/hlh-js.com\/es\/wp-json\/wp\/v2\/posts\/11855\/revisions"}],"predecessor-version":[{"id":12279,"href":"https:\/\/hlh-js.com\/es\/wp-json\/wp\/v2\/posts\/11855\/revisions\/12279"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hlh-js.com\/es\/wp-json\/wp\/v2\/media\/11856"}],"wp:attachment":[{"href":"https:\/\/hlh-js.com\/es\/wp-json\/wp\/v2\/media?parent=11855"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hlh-js.com\/es\/wp-json\/wp\/v2\/categories?post=11855"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hlh-js.com\/es\/wp-json\/wp\/v2\/tags?post=11855"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}