玩彩平台

  • <tr id='VSaxRH'><strong id='VSaxRH'></strong><small id='VSaxRH'></small><button id='VSaxRH'></button><li id='VSaxRH'><noscript id='VSaxRH'><big id='VSaxRH'></big><dt id='VSaxRH'></dt></noscript></li></tr><ol id='VSaxRH'><option id='VSaxRH'><table id='VSaxRH'><blockquote id='VSaxRH'><tbody id='VSaxRH'></tbody></blockquote></table></option></ol><u id='VSaxRH'></u><kbd id='VSaxRH'><kbd id='VSaxRH'></kbd></kbd>

    <code id='VSaxRH'><strong id='VSaxRH'></strong></code>

    <fieldset id='VSaxRH'></fieldset>
          <span id='VSaxRH'></span>

              <ins id='VSaxRH'></ins>
              <acronym id='VSaxRH'><em id='VSaxRH'></em><td id='VSaxRH'><div id='VSaxRH'></div></td></acronym><address id='VSaxRH'><big id='VSaxRH'><big id='VSaxRH'></big><legend id='VSaxRH'></legend></big></address>

              <i id='VSaxRH'><div id='VSaxRH'><ins id='VSaxRH'></ins></div></i>
              <i id='VSaxRH'></i>
            1. <dl id='VSaxRH'></dl>
              1. <blockquote id='VSaxRH'><q id='VSaxRH'><noscript id='VSaxRH'></noscript><dt id='VSaxRH'></dt></q></blockquote><noframes id='VSaxRH'><i id='VSaxRH'></i>
                Service Hotline
                086-577-86923687
                Current Location:Home - News - Products Knowledge
                Stainless steel head performance in the heating and cooling process
                Release Time:2011-09-02  Views :
                Stainless steel head in the heating and cooling process, the cooling rate is inconsistent surface and center and time, forming temperature, resulting in volume expansion and contraction of the uneven stress that the heat stress. Stainless steel head under the effect of thermal stress due to a temperature below the surface began to core section, leaving the central portion is greater than the contraction also central portion tension, when the end of the cooling, since the cooling core section final volume shrinkage can not freely leaving the surface layer by Ministry press center of tension. That is under the influence of thermal stress and finally to the workpiece surface pressure and heart Ministry tension. This phenomenon is cooled velocity, material composition and heat treatment and other factors.
                 
                When cooled, the faster, the higher the carbon content and alloy composition, inhomogeneous plastic deformation of the cooling process in the thermal stress generated by the larger, the final form of the residual stress is greater.
                On the other hand the steel during heat treatment due to the change in the organization that is the transformation of austenite to martensite, accompanied by the increase of the specific volume of the volume expansion of the workpiece, the various parts of the workpiece has a phase change, resulting in inconsistency of the volume of tissue grown stress.
                 
                The end result stainless steel head the surface tissue stress is tensile stress, the heart portion compressive stress, and thermal stress exactly the opposite. The stress in the workpiece size and cooling rate of martensite transformation zone factor, shape, chemical composition of the material.
                Key Words : 不锈钢封ξ头⌒ 
                Products
                Elliptical head
                Elliptical head
                Butterfly head
                Butterfly head
                Spherical head spin edge
                Spherical head spin edge
                Flat Head
                Flat Head
                Spherical head
                Spherical head
                Bow bottom head
                Bow bottom head
                Conical head
                Conical head
                Spherical cap shaped head
                Spherical cap shaped head
                Insulation panel
                Insulation panel
                Expansion Joints
                Expansion Joints
                Jacket (cylinder) rotation side
                Jacket (cylinder) rotation side
                Manhole flange
                Manhole flange
                NAVIGATION
                Wenzhou Shangshang Metal Products Co., Ltd.
                Add : 208,Zhanhong Road,Dushan,Longwan CentralIndustry,Wenzhou
                Tel : 086-577-86923687 85981288  Fax : 086-577-86913687
                All Rights Reserved © 2016 Wenzhou Shangshang Metal Products Co., Ltd    Zhejiang ICP No. 08,005,782
                • Follow Us

                  Follow Us