Stainless steel plate technical characteristics, especially x70 line pipe since the late 1960 s, the world basic keep an annual growth rate of 4%, the production of stainless steel stainless steel gradually expanded the application scope of the various fields of the national economy. As a result, the heat treatment process of stainless steel in the process of the produce of stainless steel has been a very important position. Stainless steel plate, 18 ni cr - 12-2.5 Mo for added Mo, so its corrosion resistance, resistance to atmospheric corrosion and high temperature strength particularly well, and can be used on the premise of beacon; Excellent work hardening (non-magnetic).
Stainless steel can be as swift and violent development, an important factor is its corrosion resistance, heat resistance. The merits of the stainless steel heat treatment process for stainless steel has a great impact on the corrosion resistance, heat resistance, but also for stainless steel processing function plays a decisive role. Stainless steel plate mechanical properties, tensile strength (Mpa) 620 MIN, 310 MIN yield strength (Mpa), elongation (%) for 30 MIN, 40 MIN area shrink (%), stainless steel plate of the density of 8.03 g/cm3, austenitic stainless steel with this value.
If the surface scale thickness of the stainless steel uns c68700 plate is not uniform, the thick and thin places below the substrate metal surface finish is different also, and pickling surface scale of dissolved and scale attached to parts of the matrix metal by acid erosion degree is different, so the steel plate surface is uneven. When heated, therefore, in the heat treatment must be evenly to form scale. To achieve this requirement, you must pay attention to the problem:
Stainless steel plate if adhered on the surface of the workpiece during heating oil, oil scale thickness of attached parts and other parts of the oxide coating thickness and composition are different, and can produce carburizing. Subcutaneous matrix metal oxide be carburized parts will be seriously affected by acid erosion. The initial burning of heavy oil burner jet of oil droplets, if attached to the workpiece, the influence is very big also. When operators are attached to the workpiece fingerprints, also can have influence. So, the operator do not directly touch the stainless steel workpiece with the hand, don't make the workpiece with new oil. Operation must be Dai Qingjie gloves.
Stainless steel plate surface during cold working of lubricating oil and so on, if any, must be in trichloroethylene full degreasing degreasing agent, caustic soda solution and then wash with warm water, then heat treatment.
Stainless steel plate and surface is sundry, uns c70600 especially organic matter or ash attached workpieces, heating, of course, will have an impact on the scale.
Stainless steel plate differences in furnace atmosphere in furnace atmosphere in the local, the formation of scale will also have change, this is also the cause of non-uniform after pickling. So, when heated, each part of the furnace atmosphere must be the same. Therefore, must also take into account the atmosphere circulation.
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