Oxygen-free copper tube and machining method thereof
The technology of an oxygen-free copper tube and a processing method is applied in the field of materials and processing, which can solve the problems of hydrogen embrittlement and the decrease of the electrical conductivity of oxygen-free copper, and achieve the effects of good corrosion resistance, good high-temperature mechanical properties, and good low-temperature performance.
Active Publication Date: 2011-10-19
济南宝世达实业发展有限公司
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Problems solved by technology
The processing technology of oxygen-free copper has two kinds of deoxidation with phosphorus and deoxidation without phosphorus. When the traditional process of deoxidation with phosphorus is used, the oxygen-free copper tube contains a small amount of phosphorus. Under the action of phosphorus, the conductivity of oxygen-free copper decreases. , hydrogen embrittlement is serious
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[0016] The present invention will be described in detail below in conjunction with the accompanying drawings. The oxygen-free copper tube is realized in the way of deoxidation with phosphorus, and better overcomes the shortcomings of copper tube conductivity drop and serious hydrogen embrittlement in the previous process of deoxidation with phosphorus. The material ratio of the oxygen-free copper tube is: containing Ag, Bi, P, Pb, the balance is Cu, the weight percentage of the contained elements is: Ag≤0.015%, Bi≤0.0005%, P: 0.001-0.006%, Pb ≤0.005%, impurity ≤0.03%.
[0017] This kind of oxygen-free copper pipe processing method is carried out according to the following steps:
[0018] 1) According to the requirements, design the shape and size of the oxygen-free copper tube;
[0019] 2) Put the electrolytic copper into the semi-continuous melting furnace for smelting, and add Ag, Bi, P, Pb to it, adjust their content within the range of their respective weight percentages...
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Abstract
The invention discloses an oxygen-free copper tube and a machining method thereof. The adopted technical scheme is that: the oxygen-free copper tube is characterized by comprising less than or equal to 0.015 percent of Ag, less than or equal to 0.0005 percent of Bi, 0.001-0.006 percent of P, less than or equal to 0.005 percent of Pb, less than or equal to 0.03 percent of impurities and the balance of copper in percentage by weight. The oxygen-free copper tube has the advantages that: (1) the oxygen-free copper tube deoxidized by phosphorus has good high-temperature mechanical property, high electric conductivity, good mechanical property, welding property, corrosion resisting property and low-temperature property and has the tensile strength of the oxygen-free copper tube up to 300MPa, the minimum conductivity of 57MS / m and the minimum elongation at break of 15 percent; (2) the oxygen content of the oxygen-free copper tube deoxidized by phosphorus can be adjusted by using the volatility of phosphorus, so that the hydrogen embrittlement can reach the first level; and (3) the oxygen-free copper tube deoxidized by phosphorus has a simple machining process and is easy to realize.
Description
technical field [0001] The invention relates to a material and a processing method thereof, in particular to an oxygen-free copper tube used for phosphorus deoxidation in a steam turbine generator and a processing method thereof. Background technique [0002] Oxygen-free copper is pure copper that does not contain oxygen and does not contain any deoxidizer residues, but actually still contains a very small amount of copper and some impurities. Among them, the oxygen content is not more than 0.003%, and the total impurity content is not more than 0.05%. The processing technology of oxygen-free copper includes phosphorus deoxidation and phosphorus-free deoxidation. When the traditional process of phosphorus deoxidation is used, the oxygen-free copper tube contains a small amount of phosphorus. Under the action of phosphorus, the conductivity of oxygen-free copper decreases. , hydrogen embrittlement is serious. Contents of the invention [0003] The purpose of the present in...
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IPC IPC(8): C22C9/00C22C1/02B21C1/22
Inventor 尚兴军孙福学韩波王振韩道玉曹爱华
Owner 济南宝世达实业发展有限公司