论文部分内容阅读
1.引言弹簧是在弹性范围内工作,不允许产生永久的塑性变形,因而要求弹簧材料有很高的弹性极限、屈服强度和抗拉强度。而我们研究的某种电机用弹簧是在较高温度下及腐蚀性环境中工作,则要求弹簧材料有良好的耐热和耐腐蚀性能,采用冷拔弹簧钢丝或油淬火-回火钢丝来制造已不能胜任,必须采用不锈钢或耐热钢来制造。由于弹簧一般是在长时间、交变载荷条件下工作,因而要求弹簧有很高的疲劳寿命。因此在加工过程中要求表面不应有裂纹、凹坑、刻痕等,同时要求材料尺寸精确、表面光洁,尽可能减少表面脱碳及有害夹杂物的含量。我们选用了某种特殊材料(以后简称A
1. INTRODUCTION Springs operate within elastic limits and do not allow permanent plastic deformation. Spring materials are therefore required to have a high elastic limit, yield strength and tensile strength. While one of the motor springs that we studied was working at higher temperatures and in a corrosive environment, spring materials were required to have good heat and corrosion resistance, made of cold-drawn spring wire or oil quenched-tempered wire Has not qualified, must be made of stainless steel or heat-resistant steel. As the spring is usually in a long time, alternating load conditions, thus requiring a spring has a high fatigue life. Therefore, in the process of processing the surface should not require cracks, pits, nicks, etc., while requiring accurate material size, smooth surface, as much as possible to reduce the surface decarburization and harmful inclusions content. We use a special material (hereinafter referred to as A