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本文根据冶金部和电子工业部联合验证与攻关的数据,和一些补充试验数据,探讨了引线钽丝抗脆能力的考核指标,讨论了影响其抗脆能力的因素,并对其金相组织和断口形貌作了一些解释。认为阳极坯块钽粉的含氧量过高是引线发脆的根本原因,炉况的好坏与引线钽丝的制造方法是发脆的重要原因。若在烧结时能抑制引线内部晶粒的长大,使弯折处保持微细而均匀的细晶组织,则可提高其抗脆能力。测定引线埋入端的硬度,以估计坯块钽粉的含氧量;测定引线露出端的硬度以考核烧结炉炉况的好坏。高氧粉配用掺杂钽丝作引线是合适的,而低氧粉配用纯钽丝即可。在不同炉况下,导致不同钽丝发脆的坯块钽粉含氧量,或称临界含氧量,则尚待确定。
Based on the data from the joint verification and research of the Ministry of Metallurgy and Electronics Industry and some supplementary test data, the paper explores the evaluation index of the anti-brittleness of the lead tantalum wire, discusses the factors that affect the anti-brittleness, and discusses its microstructure and Fracture morphology made some explanations. That the anode billet tantalum powder oxygen content is too high is the root causes of brittle lead, the furnace is good or bad and lead tantalum wire manufacturing method is the main cause of brittleness. If the sintering can inhibit the growth of grain within the lead, the bend to maintain fine and uniform fine grain structure, you can improve its anti-brittle ability. The hardness of the lead embedded end was measured to estimate the oxygen content of the tantalum powder in the block. The hardness at the exposed end of the lead was measured to evaluate the condition of the fired furnace. High oxygen powder doped with tantalum wire for the lead is appropriate, and low oxygen powder with pure tantalum wire can be. In different furnace conditions, resulting in different tantalum wire brittle briquette tantalum oxygen content, or the critical oxygen content, has yet to be determined.