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Abstract：
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The paper states the cold forming and mechanical properties of 18Ni8Co5Mo Martensite aging-steel; the effect of several heating treatment status (solid-solution and some over-aging) of this steel in cold forming to the thinning of the components; studies on some lubricating effects to the reduction of components thinning in cold forming. It is successful that the thinning rate of one-time cold-stamping parts reaches to that around 10% for semi-spherical parts of 65mm dia., with 2-hour aging treatment process under 650℃, the sheet being coated with engine oil upon the Qo-1 celluloid paint, in addition, the resistance to tension deformation is enchanced near the thinning region of the component. By applying this technique, a thinning rate of 15% can be achieved with the semi-spherical parts of φ/300mm diameter.
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AuthorIntro：
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Reference：
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[1] C.G. Bieleez; Metal Progress, Vol 78、 (1960) , 99．
[2] 上海钢铁研究所 超高强度钢(1968) ,104．
[3] B.Mintz and J.C. Wright; J.I.S.I,Vol208, (1970) , 401．
[4] D.J. Campion; Sheet Metal Industries,Vol45． (1968) ,733．
[5] B. Mintz and J.C. Wright; Sheet Metal Industries Vol47． (1970) , 501．
[6] 中国科学院金属研究所,金情74-114 (1974) ,11．
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