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为了掌握X20H80电热丝材料的加工性能,曾进行了可塑性、锻造、压延、冷拔和热处理的系统研究工作,并曾于实验室内由200毫米直经的铸锭制造了1.0毫米直经的线材进行寿命测量试验。结果良好,充分证实了在实验室内求出的可塑性指标是正确的。兹将本研究的主要结果归纳如下: 1.不同的可塑性试验和实际的锻造和压延试验证实了此合金的最好热加工温度范围为1100-1300℃。在800℃与1000℃之间存在着一个较脆性的温度范围,在加工过程中,应尽量避开此较脆性的温度范围。2.在800℃与1300℃之间压延此合金的扁平试样时,变形阻力与压下率间存在着直线关系。横展量亦随压下率的增大而迅速上升。在压下率为30%以下,温度的上升提高了横展量。3.为了获得良好的成品,锻造时应采用圆角较大的锤头以消除折叠;孔型设计时应充分考虑横展量,以免产生耳子造成折叠;冷拔模子应力求光滑,润滑剂亦应保证清洁。4.冷拔时线材的退火规范,依冷拔量的不同,在900-1050℃下保温20-30分钟,均能获得良好的结果。5.此合金有良好的冷加工性能。退火后一次冷拔不发生断裂的最大加工量可达35.4%,连续冷拔可以达到90%的断面减缩率。
In order to master the processability of the X20H80 heating wire material, a systematic study was performed on plasticity, forging, calendering, drawing and heat treatment. In the laboratory, wires of 1.0 mm diameter passed straight from an ingot of 200 mm Lifetime measurement test. The results are good, fully confirmed in the laboratory to determine the plasticity index is correct. The main results of this study are summarized as follows: 1. Different plasticity tests and actual forging and rolling tests confirm that the best hot working temperature range for this alloy is 1100-1300 ° C. There is a more brittle temperature range between 800 ° C and 1000 ° C, and the more brittle temperature range should be avoided during the process. 2. There is a linear relationship between the deformation resistance and the reduction rate when a flat sample of this alloy is rolled between 800 ° C and 1300 ° C. The amount of roll-up also increased rapidly with the reduction rate. When the reduction ratio is 30% or less, the increase of the temperature increases the amount of stretching. 3. In order to obtain a good product, forging should use larger rounded hammer to eliminate folding; hole design should give full consideration to the amount of cross-section, so as not to cause the ears caused by folding; cold drawing mold should be smooth, lubricants Should also ensure that clean. 4. Cold drawn wire annealing specifications, according to the different amount of cold drawing, incubated at 900-1050 ℃ for 20-30 minutes, can get good results. 5. This alloy has good cold workability. Annealed after a cold-drawn without fracture up to 35.4% of the maximum amount of processing, continuous drawing can reach 90% of the reduction rate of section.