1445533 Heat-treating cartridge cases MANUFACTURE DE MACHINES DU HAUTRHIN SA 16 Sept 1974 [9 Oct 1973] 40267/74 Heading C7N [Also in Division F3] Steel cartridge cases having a wall portion 12 and a base portion 14 are heated inductively such that the wall portion 12 is heated above the transformation temperature (i.e. above Ac3) while a portion of the base 14 remains below the transformation temperature, the case being subsequently quenched and annealed. The transition zone 24 between the heated wall portion and the portion of the base where the temperature is below the transformation point is situated within the base.
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机译：1445533热处理墨盒匣1974年9月16日（1973年10月9日）DU HAUTRHIN SA MACHINE MANUFACTURE DE MACHINES DE MACHINES DU HAUTRHIN SA 1974年9月9日40267/74标题C7N [也在F3分部中]具有壁部12和底部14的钢制墨盒匣被感应加热，使得壁部分12被加热到高于转变温度（即，高于Ac 3），同时基底14的一部分保持低于转变温度，随后将壳体淬火并退火。在加热的壁部分和底座的温度低于转变点的部分之间的过渡区域24位于底座内。
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