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Fe-Cr-Al alloy electric light filaments trial

Hot homes Jin Guangliang filaments products, and master alloy production OCr25AI electric light filament technology, its performance to GB123, 1 ((high resistance electric heating alloy standards, mass production capability. Second, the process line: raw material blank line - Drawn - Cleaning - Bright Annealed - products - Testing - packaging and storage three, drawn: l, the preparation of the mold (with mold) alloy wire drawing is the production of electric light filaments of qualified products, the main factors, both to ensure that wire surface quality and to ensure the performance of the alloy, so the drawing process of the preparation of the mold (with mode selection) is appropriate,[link widoczny dla zalogowanych], directly affect the surface quality and alloy wire process performance, so we take this issue on the drawing die many times and a variety of drawing materials testing and comparing different model relationship with the mold, resulting in a more satisfactory and reasonable distribution molding. (in the compression ratio of not less than 30% based on) the two product lines with mold processes are as follows: Line :1.0 - 0 .9-0.8-0.7 product into the line 1.0-0.9-0.8-0.65-0.6-0. 55 finished 2, drawing in the lubricant used in the process of drawing wire die preparation of a reasonable, but also there is the choice of lubricant problems. lubricant in the drawing process also affect the electric light filaments on the surface alloy quality and alloy properties, especially surface finish. so proper selection of lubricant is a major problem in drawing, so we used in the trial process of solid lubrication with liquid lubrication two, tested the results obtained in Table l Table 1. --........ good heat resistance of solid l a poor heat resistance -------- l} liquid dye J Yan Tong clean smooth surface 15 of wire and therefore, we use liquid lubrication, it is more suitable for small lines drawn out four,[link widoczny dla zalogowanych], bright annealing electric light alloy annealed filaments production OCr25AI5 the final steps, is the most critical processes. qualified products depends on the hydrogen purity, flow, back furnace temperature and the speed of collection lines, which is the production of electric alloy filaments in the key. 1, the purity and flow of hydrogen: Hydrogen is the production of electric light alloy products bright filaments important raw material for processing. And through the liquid hydrogen hydrogen furnace to manufacture ammonia. to obtain high purity hydrogen, hydrogen furnace must be making a fuss. of liquid ammonia as a raw material requirements are also high MG, its only a small amount of volatile impurities in the water and gas, it is noteworthy The is one of the micro-oxygenated rage. At the same time when the ammonia decomposition reaction can not be negative, we can see if trying to remove the ammonia decomposition is easier to remove a small amount of water,[link widoczny dla zalogowanych], you have to q than the pure hydrogen. After many experiment showed that a more reasonable process parameters in Table 2: Table base Cl hydrogen purity ammonia decomposition furnace gas flow temperature t Q99 · 5% 1600 ~ 630 ℃ i1 · 5 ~ 2, annealing of the gentle and line speed collection hydrogen main role is to protect the wire in the annealing process the surface brightness! In addition to the purity of flow of gas, there is a major problem that the temperature of annealing furnace and the closing line of choice and the speed V of the relationship between machines. To get the electric light alloy thin wire surface brightness and good process performance, to ensure the purity of hydrogen, hydrogen flow rate Q, the more important is to ensure that the temperature of annealing t and the rate of income-ray machine V. in the light annealing furnace annealing process temperature t Church 『L} with the closing line of the relationship between the speed V maximum low temperature all affect the line surface brightness and process performance, which is the key to the production. Therefore,[link widoczny dla zalogowanych], we focus on the temperature and speed of Yin's research and testing, and After many trials have been more reasonable temperature and speed, the parameters for the different specifications of the line through and select different temperature t and the speed of sneeze V parameters in Table 3: Table 3O · 7mm temperature of 990 ℃ speed of 225 rev / min O · 5mm temperature of 900 ℃ speed of 150 rev / min these parameters to the line surface brightness and process performance is guaranteed, the effect is good. Fifth, the performance of electric filament light alloy according to GB1234-85 standard tests of high resistance electric heating alloy, the results in Table 4 Table 4 Resistivity f resistance uniformity Q · mm. / Ml% 1.42 ± 0.07l not more than 51.40 ~ 1.45lO ~ 0.23 Name of GB1234-85 fast life of a factory prototype test temperature ℃ f life Test 2.4.1 is not 1250I18 winding 1250f qualified six,[link widoczny dla zalogowanych], the conclusion l, product performance in line GBl234 standards and regulations. 2, the product of the process line and mass production techniques and products to meet the performance requirements. l8