牌号 | Carpenter Stainless Type 430FR Solenoid Quality |
厂家 | Carpenter Technology Corporation |
分类 | Steel |
介绍 | Carpenter Stainless Type 430FR Solenoid Quality is a ferritic chromium-iron alloy specially developed for soft magnetic components which must operate in corrosive environments. The corrosion resistance of this alloy is similar to that of Carpenter Stainless Type 430F Solenoid Quality. The increased silicon content of Stainless Type 430FR Solenoid Quality results in higher electrical resistivity and annealed hardness as compared to Stainless Type 430F Solenoid Quality. The higher hardness reduces deformation (peening) that can occur during impacts between moving and stationary parts of AC and DC magnetic circuits. When supplied in the mill annealed condition (approximately Rockwell B 83), the DC magnetic properties of Stainless Type 430FR Solenoid Quality bars are similar to those of the Stainless Type 430F Solenoid Quality product mill annealed to approximately Rockwell B 78 hardness. In applications involving AC excitation, Stainless Type 430FR Solenoid Quality has exhibited superior performance due to its higher electrical resistivity. This advantage increases as the magnetic component diameter and frequency increase due to the suppression of eddy current losses. Stainless Type 430FR Solenoid Quality is available in the unannealed condition when the size ordered cannot be supplied in the mill annealed condition and/or in the most magnetically soft condition. Depending on the requirement of the application, parts may have to be heat treated to render them more magnetically soft than as supplied. Mill annealed material is supplied in the form of centerless ground bar items made to standard tolerances 0.250" (6.35 mm) round and larger at a hardness range of Rockwell B 80/88. In this condition, AC and DC magnetic properties are in the same range as those obtained when applying the suggested heat treatment to the unannealed alloy. Precision ground bars 0.250" (6.35mm) and larger can be supplied with a slightly higher hardness and somewhat "harder" magnetic properties. Magnetic core components can be machined to size, chemically passivated if necessary, then assembled into the finished product. |
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