{"id":2363,"date":"2026-04-10T08:31:19","date_gmt":"2026-04-10T00:31:19","guid":{"rendered":"https:\/\/jtlcnc.com\/?p=2363"},"modified":"2026-04-10T08:31:24","modified_gmt":"2026-04-10T00:31:24","slug":"how-to-eliminate-internal-stresses-in-precision-metal-parts-through-different-heat-treatment-processes","status":"publish","type":"post","link":"https:\/\/jtlcnc.com\/fr\/2026\/04\/10\/how-to-eliminate-internal-stresses-in-precision-metal-parts-through-different-heat-treatment-processes\/","title":{"rendered":"How to eliminate internal stresses in precision metal parts through different heat treatment processes?"},"content":{"rendered":"

To eliminate internal stresses in precision metal parts, the core approach is: heat the material to “loosen” the atoms, then cool it slowly to releasetress, while minimizing deformation and preserving hardness and strength.<\/p>\n\n\n\n

I. Stress Relief Annealing (Most Universal and Commonly Used)
Principle
Heat to a temperature below the phase transformation point, hold a period to allow internal stresses to relax, then cool slowly.
Does not alter the microstructure, does not significantly soften the material, and provides excellent dimensional stability.
Process Parameters (Cmon Ranges)
Carbon Steel \/ Structural Steel: 550\u2013650\u00b0C, holding time 2\u20136 hours
Cast Iro: 500\u2013550\u00b0C
Stainless Steel: 600\u2013750\u00b0C
Cooling: Slow cooling in the furnace to below 200\u00b0C before unloading.
Ale Scenarios
Precision shafts, sleeves, molds, and fixtures
Parts after machining, welding, or cold forming
Precision parts requiring high dimensional accuracy and long-term deformation resistanc
Avantages
Effective stress relief
Minimal impact on hardness and strength
Minimal deformation<\/p>\n\n\n\n

II. Low-Temperature Annealing (Low-Temperature Stress Relief, Preventing Deformation)
Ptemperatures, generally 250\u2013450\u00b0C, with long holding times.
Caract\u00e9ristiques
Lower stress elimination rate than high-temperature stress relief annealing, beven smaller deformation
Suitable for precision parts that have already been finish-machined and have high hardness
Applicable
Precision gauges, cutting tools, precision stamping that cannot tolerate any dimensional changes.<\/p>\n\n\n\n

III. Aging Treatment (Especially suitable for precision alloy parts)<\/p>\n\n\n\n

    \n
  1. Natural Aging
    Stored at room temperature for several months to several years.
    Stress is released slowly.
    Advantages: Zero deformation.
    Disadvantages: Slow, low efficiency.
    Mainly used for: High-precision machine tool beds, precision platforms, gauges, etc.<\/li>\n\n\n\n
  2. Artificial Aging (Mainstream in industry)
    Heated to 100\u2013200\u00b0C and held for several hours to dozens of hours, then air-cooled.
    Applicable to:
    Precision parts of aluminum alloys
    Precision parts of titanium alloys and high-temperature alloys
    Structural components of high-precision instruments
    Caract\u00e9ristiques :
    Stress relief and stabilization
    Basically does not change dimensions and mechanical properties
    Commonly used as the final stabilization treatment after precision machining<\/li>\n<\/ol>\n\n\n\n

    IV. High-Temperature Tempering (Suitable for parts after quenching)
    If parts have already undergone quenching medium-high temperature tempering, the tempering itself will eliminate quenching stresses.
    Process:
    Tempering at 500\u2013650\u00b0C
    Furnace cooling or air cooling
    Applicable to:
    Precision molds, precision gears, shafts
    Structural components requiring high toughness dimensional stability<\/p>\n\n\n\n

    V. Vibration Aging (Auxiliary stress relief, no heating)
    Not a heat treatment, but often used in conjunction with heat treatment:
    Using vibration equipment to make the part resonate and release internal stresses
    Temperature does not rise, completely deformation-free
    Suitable for large precision parts, welded parts, machine tool beds
    Can be used as:
    A supplement to heat treatment stress relief
    The only option when heating the part is not allowed<\/p>\n\n\n\n

    VI. Selection for Different Materials (Direct reference)<\/p>\n\n\n\n

      \n
    1. Precision parts of carbon steel \/ alloy structural steel
      After rough machining: Stress-relief annealing at 550\u2013600\u00b0C
      Before\/after precision machining: Low-temperature annealing at around 300\u00b0C<\/li>\n\n\n\n
    2. Precision parts of stainless steel
      Stress relief: Stress-relief annealing at 600\u2013700\u00b0C
      High corrosion resistance requirements: Avoid excessively high temperatures<\/li>\n\n\n\n
    3. Precision parts of aluminum alloys
      Artificial aging at 120\u2013170\u00b0C, 4\u201324 hours
      Strictly prohibit high temperatures, otherwise softening and deformation will occur<\/li>\n\n\n\n
    4. Precision platforms\/beds of cast iron
      Stress-relief annealing at 500\u2013550\u00b0C
      Combined with natural aging for excellent dimensional stability<\/li>\n\n\n\n
    5. High-precision gauges, gauge blocks
      Low-temperature aging cryogenic treatment (around -70\u00b0C)
      Multiple cycles to ensure long-term dimensional stability<\/li>\n<\/ol>\n\n\n\n

      VII. Key Points (To ensure precision without deformation)
      Heating speed must be slow
      Especially slow for large parts and complex parts to prevent the superposition of thermal stresses.
      Holding time must be sufficient
      For every 10mm increase in wall thickness, holding time should be extended by about 1 hour.
      Cooling must be slow
      Rapid cooling will regenerate stresses, making previous efforts futile.
      Process sequence is important
      Recommended sequence:
      Rough machining \u2192 Stress-relief annealing \u2192 Semi-precision machining \u2192 Low-temperature aging \/ stabilization treatment \u2192 Precision machining
      Strictly prohibit high-temperature treatment after precision machining, as it is extremely prone to deformation exceeding tolerances.<\/p>\n\n\n\n

      Brief Summary
      To thoroughly relieve stress stabilize dimensions: Use stress-relief annealing
      To have almost no deformation: Use low-temperature annealing or artificial aging
      Quenched parts: Use high-temperature tempering
      Large parts: Combine heat treatment with vibration aging.<\/p>\n\n\n\n

      \"\"<\/figure>","protected":false},"excerpt":{"rendered":"

      To eliminate internal stresses in precision metal parts, the core approach is: heat the material to “loosen” the atoms, then cool it slowly to releasetress, while minimizing deformation and preserving hardness and strength. I. Stress Relief Annealing (Most Universal and Commonly Used)PrincipleHeat to a temperature below the phase transformation point, hold a period to allow…<\/p>","protected":false},"author":1,"featured_media":2366,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[35],"tags":[],"class_list":["post-2363","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"taxonomy_info":{"category":[{"value":35,"label":"NEWS"}]},"featured_image_src_large":["https:\/\/jtlcnc.com\/wp-content\/uploads\/2026\/04\/\u5fae\u4fe1\u56fe\u7247_20260402092045_31_11.jpg",718,817,false],"author_info":{"display_name":"jinxing6611@gmail.com","author_link":"https:\/\/jtlcnc.com\/fr\/author\/jtlcnc\/"},"comment_info":0,"category_info":[{"term_id":35,"name":"NEWS","slug":"news","term_group":0,"term_taxonomy_id":35,"taxonomy":"category","description":"","parent":0,"count":129,"filter":"raw","cat_ID":35,"category_count":129,"category_description":"","cat_name":"NEWS","category_nicename":"news","category_parent":0}],"tag_info":false,"_links":{"self":[{"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/posts\/2363","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/comments?post=2363"}],"version-history":[{"count":1,"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/posts\/2363\/revisions"}],"predecessor-version":[{"id":2367,"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/posts\/2363\/revisions\/2367"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/media\/2366"}],"wp:attachment":[{"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/media?parent=2363"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/categories?post=2363"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/tags?post=2363"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}