铁路铸钢车轮V法铸造工艺的探索试验研究
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摘要
目前铁路货车铸钢车轮生产工艺为石墨铸型表面挂水玻璃砂衬、雨淋式浇口浇注、中央冒口集中补缩的生产技术,水玻璃加入比例5%～6%。受工艺的限制,产生的废砂再生处理比较困难,每年消耗约2.5万吨石英砂。为了实现绿色铸造的目标,研究了冷铁嫁接V法铸造工艺。铸造模拟及与之前产品对比表明,V法工艺方案可行,并进行了试生产。浇注的产品经过超声波探伤、磁粉探伤、X光检测和低倍检测,发现铸件的表面质量和内在质量都存在一定的问题,但该工艺的实施在铁路铸钢车轮生产领域具有重要意义。同时,为后续对该工艺继续进行深入细致研究提供了基础数据和参考。
At present, the production technology of cast steel wheels for railway mostly adopts graphite mold with sodium silicate-bonded sand lining, shower gating system, and central riser feeding, among which the addition proportion of sodium silicate is 5%-6%. Due to the limitation of technology, it is difficult to regenerate the waste sand, which consumes about 25 000 tons of quartz sand every year. In order to achieve the goal of green casting, the chill grafting vacuum process casting was studied. The simulation and comparison with the previous products showed that vacuum process casting was feasible, and then the trial production was carried out. After ultrasonic inspection, magnetic flaw detection, X-ray test and low magnification micrography, it was found that there still existed some quality problems in the surface and interior of the castings. However, the implementation of this technology is of great significance in the field of railway cast steel wheel production.At the same time, this experiment provides the basic data and reference for further in-depth and detailed research on the casting process.
At present, the production technology of cast steel wheels for railway mostly adopts graphite mold with sodium silicate-bonded sand lining, shower gating system, and central riser feeding, among which the addition proportion of sodium silicate is 5%-6%. Due to the limitation of technology, it is difficult to regenerate the waste sand, which consumes about 25 000 tons of quartz sand every year. In order to achieve the goal of green casting, the chill grafting vacuum process casting was studied. The simulation and comparison with the previous products showed that vacuum process casting was feasible, and then the trial production was carried out. After ultrasonic inspection, magnetic flaw detection, X-ray test and low magnification micrography, it was found that there still existed some quality problems in the surface and interior of the castings. However, the implementation of this technology is of great significance in the field of railway cast steel wheel production.At the same time, this experiment provides the basic data and reference for further in-depth and detailed research on the casting process.
引文
[1]胡昌军. V法铸造工艺及其在铸钢件中的应用[J].现代制造技术与装备,2013(5):54-55.
[2]崔广九. V法造型工艺研究[J].中国矿业,2000(9):410-412.
[3]刘旭,胡斌,向东湖. V法铸造工艺的研究[J].水泥技术,2013(5):27-29.
[2]崔广九. V法造型工艺研究[J].中国矿业,2000(9):410-412.
[3]刘旭,胡斌,向东湖. V法铸造工艺的研究[J].水泥技术,2013(5):27-29.