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Abstract：
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The support plate screws formed by upsetting process are widely used in aircraft assembly. Therefore, according to the material characteristics of cold upsetting wire and the experience of fastener industry, the cost-efficient preliminary heat treatment scheme of pre-heat treatment of tempering + final heat treatment of tempering was determined. In order to verify the reliability of processing technology, the wedge load tension test was conducted according to the installation and use of product, and the process capability analysis of the test results was conducted. The result proves that the preliminary heat treatment scheme has potential quality hazards with the product process capability index Cpk<0.67. After the physical and chemical test and analysis on the products with potential quality problems, it is proved that the uneven streamlines and grains of the original heat treatment scheme are the main reason why the products do not meet the quality requirements. Furthermore, the pre-heat treatment process of annealing at low temperature and the process of quenching+tempering after upsetting was adopted, and then the wedge load tension test and the metallographic examination were carried out to verify the process capability index Cpk>1.67. Thus, the product manufacturing process meets the use requirements, and the quality of processed product is stable.
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Funds：
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AuthorIntro：
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王强（1972-），男，工程硕士，高级工程师，E-mail：sur.f@163.com
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Reference：
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[1]夏巨谌，邓磊，金俊松，等. 我国精锻技术的现状及发展趋势 [J]. 锻压技术，2019,44(6):1-16.
Xia J C，Deng L，Jin J S，et al. Current situation and development trend of precision forging technology in China [J]. Forging & Stamping Technology，2019,44(6):1-16.
[2]徐景华.金属镦锻成形技术[M]. 北京：机械工业出版社，2005.
Xu J H. Upsetting Technology of Metal [M]. Beijing: China Machine Press, 2005.
[3]洪慎章.冷挤压实用技术[M]. 北京：机械工业出版社，2014.
Hong S Z. Practical Technology of Cold Extrusion [M]. Beijing: China Machine Press, 2014.
[4]航空制造工程手册总编委会. 航空制造工程手册 [M]. 第2版. 北京：机械工业出版社，2010.
Committee of Editors-in-chief of the Aeronautical Manufacturing Engineering Manual. Aeronautical Manufacturing Engineering Manual[M]. The 2nd Edition. Beijing: China Machine Press, 2010.
[5]孙维，华刚，许健, 等. 免退火高强度冷镦钢盘条生产技术研究[A].中国金属学会. 2005中国钢铁年会论文集[C]. 北京：冶金工业出版社，2005.
Sun W, Hua G, Xu J，et al. Study on production technology of non-annealed high strength cold heading steel wire rod[A]. China Metal Society. 2005 Proceedings of the Chinese Iron and Steel Annual Conference[C]. Beijing: Metallurgical Industry Press, 2005.
[6]航天精工有限公司. 紧固件概论[M]. 北京：国防工业出版社，2014.
Aerospace Seiko Co., Ltd. Introduction to Fasteners [M]. Beijing: National Defense Industry Press, 2014.
[7]GJB 122.15—1986，双耳托板螺钉[S].
GJB 122.15—1986，Binaural plate screw[S].
[8]GB/T 5953—1999，冷镦钢丝[S] .
GB/T 5953—1999，Cold heading wire[S].
[9]GJB 124—1986，螺栓和螺钉的强度数据[S].
GJB 124—1986，Strength data for bolts and screws[S].
[10]张公绪，孙静. 质量工程师手册 [M]. 北京：企业管理出版社，2003.
Zhang G X, Sun J. Manual for Quality Engineer[M]. Beijing: Business Management Publishing House,2003.
[11]任松赞，张静江，陈质如，等. 钢铁金相图谱[M]. 上海：上海科学技术文献出版社，2003.
Ren S Z, Zhang J J，Chen Z R, et al. Metallurgical Atlas of Iron and Steel[M]. Shanghai: Shanghai Science and Technology Literature Publishing House, 2003.
[12]李炯辉，林德成. 金属材料金相图谱[M]. 北京：机械工业出版社，2006.
Li J H, Lin D C. Metallographic Atlas of Metallic Materials [M]. Beijing: China Machine Press,2006.
[13]叶玉娟，高全德. 30CrNi3MoVA钢的晶粒细化及组织均匀化研究 [J].锻压技术，2019,44(5):169-173.
Ye Y J，Gao Q D. Research on grain refinement and organization uniformity of 30CrNi3MoVA steel[J].Forging & Stamping Technology，2019,44(5):169-173.
[14]张永军，张波，张鹏程，等. 中碳冷镦钢的室温压缩变形及其不均匀应变硬化行为 [J].锻压技术，2019,44(2):167-172.
Zhang Y J，Zhang B，Zhang P C，et al. Compression deformation at room temperature and inhomogeneous strain-hardening for medium carbon cold heading steel [J].Forging & Stamping Technology，2019, 44(2):167-172.
[15]胡光立. 钢的热处理[M]. 西安：西北工业大学出版社，2016.
Hu G L. Heat Treatment of Steel [M]. Xi′an: Northwest University of Technology Press,2016.
[16]HB/Z 136—2000，航空结构钢热处理工艺[S].
HB/Z 136—2000，Heat treatment process of aviation structural steel[S].
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