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Application of Six Sigma in Improving Qualified Rate for Negative Deviation of Screw-thread Steel
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Qi-meng Zheng1, Yan-xiang Wu1, Chuan Zhang1, Ming-ming Wu2
Rare Earth Steel | 2018, 44(5) : 55 - 59
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Rare Earth Steel | 2018, 44(5): 55-59
• Quality of Variety and Experiment and Research •
Application of Six Sigma in Improving Qualified Rate for Negative Deviation of Screw-thread Steel
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Qi-meng Zheng1, Yan-xiang Wu1, Chuan Zhang1, Ming-ming Wu2
Affiliations
  • 1.Long Products Plant of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China
  • 2.Technology Quality Dept. of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China
Published: 2018-10-25 doi: 10.13647/j.cnki.btgkj.2018.05.016
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In the paper, the basic reasons for the qualified rate for negative deviation of screw-thread steel are determined and the control level of basic reasons is established by taking φ25 mm screw-thread steel as an example, combining with the idea of six sigma using DMAIC steps to solve problems and supporting by data. As a result, the qualified rate for negative deviation of screw-thread steel is increased from 65.6% to 91.36% in order to better adapt to the delivery of screw-thread steel by theoretical weight, increase product profit and reduce costs of per ton of steel.

screw-thread steel  /  six sigma  /  negative deviation
郑启蒙, 武艳香, 张川, 吴明明. 六西格玛在提高螺纹钢负偏差合格率中的应用. 包钢科技, 2018 , 44 (5) : 55 -59 . DOI: 10.13647/j.cnki.btgkj.2018.05.016
Qi-meng Zheng, Yan-xiang Wu, Chuan Zhang, Ming-ming Wu. Application of Six Sigma in Improving Qualified Rate for Negative Deviation of Screw-thread Steel[J]. Science & Technology of Baotou Steel, 2018 , 44 (5) : 55 -59 . DOI: 10.13647/j.cnki.btgkj.2018.05.016
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Year 2018 volume 44 Issue 5
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Article Info
doi: 10.13647/j.cnki.btgkj.2018.05.016
  • Receive Date：2018-02-22
  • Online Date：2026-10-20
  • Published：2018-10-25
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  • Received：2018-02-22
Affiliations
    1.Long Products Plant of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China
    2.Technology Quality Dept. of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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