Production process flow and control raw data → raw data inspection → raw data pretreatment → batching → batching inspection → vacuum induction melting → fast cooling ingot casting → semi-finished product inspection → heat treatment → coarse crushing → pulverizing → sieving → post-processing → vacuum or nitrogen-filled packaging → finished product inspection
A: Exercise:
1) The supplier of process requirements shall supply the material list, and the QC department shall also conduct tests. The composition and impurity content shall be treated and put into storage for standby if they are satisfied with the process requirements.
2) material pretreatment is important to eradicate the original material appearance of pollutants and oxide layer, to ensure that the original data clean.
3) The ingredients should be based on different conditions according to the provisions of the target complement some volatile elements such as rare earth, manganese burning.
4) vacuum induction melting to 0.1Pa vacuum filled with argon, at 1300 ℃ high temperature will be the components of the metal melting into alloy, fast cooling ingot, in order to obtain grain refinement, uniform structure of the alloy.
B: semi-finished products: semi-finished products inspection has three aspects:
1) Appearance: The appearance of the alloy should be metallic luster, without obvious oxidation discoloration, and the alloy structure should be uniform and fine, without looseness and impurities;
2) Chemical composition: the chemical composition of the alloy should be consistent with the planning composition;
3) Electrochemical capacity: it should be satisfied with the company's specification requirements, otherwise it cannot be turned down.
C: Heat treatment:
Using vacuum heat treatment furnace, vacuum and then filled with argon maintenance. The heat treatment process is important to homogenize and stabilize the product (eliminate internal stress), ensure the flat platform pressure of the alloy, excellent uniformity and excellent cycle life characteristics. Focus on ensuring temperature and vacuum degree, oxygen content determination.
D: The whole process of alloy coarse crushing, pulverizing and packaging is fully closed under argon maintenance to ensure that the oxygen content of the alloy is very low. Finished product inspection has four aspects
1) appearance: the appearance of no discoloration oxidation phenomenon, no agglomeration phenomenon
2) Physical properties, particle size distribution and loose loading ratio shall conform to the company's specifications;
3) Chemical characteristics: the composition and impurity content of alloy powder and the PCT curve of alloy conform to the company's specifications;
4) Electrochemical properties: electrochemical capacity, charge and discharge characteristics, cycle life, high current pulse discharge characteristics and temperature characteristics of the alloy. The inner packaging of the product is nylon composite plastic bag vacuum double-layer packaging, the whole box is filled with nitrogen plastic bag packaging, outer box: carton.
18006162013 
中文 