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金属学报  1957, Vol. 2 Issue (1): 41-63    
  论文 本期目录 | 过刊浏览 |
镍铬电热丝材料X20H80的加工性能的研究
张作梅;孟寿山;高子明
中国科学院金属研究所;中国科学院金属研究所;中国科学院金属研究所
THE PROPERTIES OF NICHROME 80 Ni-20Cr UNDER MECHANICAL WORKING
CHANG TSO-MEI;MAN SHOO-SHAN;GAU TZE-MING Institute of Metal Research; Academia Sinica
全文: PDF(5678 KB)  
摘要: 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。
Abstract:In order to find out the properties of Nichrome 80 Ni-20 Cr under mechanicalworking, a systematic research has been conducted on the workability, forging, roll-ing, wire-drawing and heat-treatment of this material. Wires of 1 mm diameterhave also been successfully drawn from rolled rod that has been made from ingotsunder laboratory conditions. These have been tested for life in accelerated lifetest apparatus of our own make and have been found to possess satisfactory pro-perties as a heating element. The following are the chief results obtained: 1. From the results of the various workability tests and also results from forg- ing and rolling tests, this alloy has best hot-working properties within the tem-peratures of 1100℃ and 1300℃, Between 800℃ and 1000℃, there exists a brittletemperature range. It is best to avoid this brittle temperature range duringmechanical working. 2. The resistance to deformation of this material lowers gradually with therise in temperature. Even at the high temperatures of 1000—1300℃, there ismarked increase in resistance to deformation with the increase in reduction byrolling. When flat specimens are rolled, linear relationship exists between reduc-tion and the resistance to deformation between temperatures of 800℃ and 1300℃.The lateral spread also increases rapidly with the increase in reduction by rolling.When the reduction is below 30%, a rise in temperature increases the value oflateral spread. 3. With a view to obtaining products of good quality, the anvils of hammersused should have well-rounded edges in order to avoid the occurrence of folds.Similarly, in roll pass designs, the lateral spread should be carefully consideredin order to eliminate the occurrence of ears and consequently the folds producedfrom it. The drawing dies should have smooth working surfaces and the lubricantused should be clean. 4. According to the degree of cold work, the best results could be obtainedin heat-treating this material within the temperatures of 900℃ and 1050℃ whenthe soaking time is kept between 20 to 30 minutes. 5. The well-treated alloys have good cold-drawing properties. During experi-ments, the greatest reduction per pass permissible for a single drawing operationreached 35.4%; while in successive drawing, as much as 90%, reduction in cross-sectional area was recorded.
收稿日期: 1957-01-18      出版日期: 1957-01-18

引用本文:

张作梅;孟寿山;高子明. 镍铬电热丝材料X20H80的加工性能的研究[J]. 金属学报, 1957, 2(1): 41-63.
CHANG TSO-MEI;MAN SHOO-SHAN;GAU TZE-MING Institute of Metal Research; Academia Sinica. THE PROPERTIES OF NICHROME 80 Ni-20Cr UNDER MECHANICAL WORKING. Acta Metall Sin, 1957, 2(1): 41-63.

链接本文:

http://www.ams.org.cn/CN/      或      http://www.ams.org.cn/CN/Y1957/V2/I1/41

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