<address id="drldn"></address>

      <form id="drldn"><form id="drldn"><nobr id="drldn"></nobr></form></form>
      <address id="drldn"><nobr id="drldn"></nobr></address>
      <form id="drldn"></form>
      <form id="drldn"><nobr id="drldn"></nobr></form>

          Advantages of vacuum heat treatment technology of vacuum furnace

          Release date:2020-01-18 10:18:22

          Advantages of vacuum heat treatment technology of vacuum furnace

          Vacuum furnace is a kind of industrial furnace heated by electric heating elements in the near vacuum state.

            image.png

          Vacuum heat treatment technology has the following advantages:

          Realize the heating without oxidation and decarburization: because the mould is heated in vacuum, the oxygen partial pressure of residual gas is very low, the surface is not oxidized or decarburized, and no toxic products are formed.

          Small deformation and uniform hardness: because vacuum heating mainly relies on heat radiation under high temperature, low temperature convection is very weak, so the heating is slow, the temperature difference between the surface and the center of the workpiece is small, expansion and contraction are relatively uniform, resulting in small thermal stress, so as to reduce the final deformation of the workpiece.

          Improve the plasticity and strength of the workpiece: the solid metal is heat treated under vacuum, and the surface has degassing effect, so as to improve its plasticity and strength.

              Clean workpiece surface: the grease attached to these objects in vacuum belongs to common aliphatic group, which is carbon, hydrogen, oxygen compound, with high vapor pressure. When heated in vacuum, it is volatilized or decomposed, and then pumped out by vacuum pump to purify the workpiece surface.


          午夜dj免费高清视频在线观看_y1111111少妇无码_午夜看片a福利在线观看_暴露放荡的娇妻AV