公开(公告)号：KR100371554B1

公开(公告)日：2003-02-07

申请号：KR1020010006241

申请日：2001-02-08

Applicant: 현대자동차주식회사

Inventor： 정범구 ,  홍광화

IPC: C23C28/00

CPC classification number: C09D5/08 ,  C23C22/74 ,  C23C22/83 ,  C23C26/00 ,  C23C30/00

Abstract: Disclosed is a coating composition for DACROTIZED(TM) film comprising Cr-containing inorganic acid, Ni carbonate, reductant, surfactant and water which has excellent corrosion resistance, weather resistance and chemical resistance thus being widely applicable to anticorrosion treatments of metals such as various alloys, sintering metals, and the like.

Abstract translation: 本发明公开了一种用于DACROTIZED TM膜的涂料组合物，其包含具有优异耐腐蚀性，耐候性和耐化学性的含Cr无机酸，碳酸镍，还原剂，表面活性剂和水，因此可广泛应用于金属如各种合金的抗腐蚀处理 ，烧结金属等。

公开(公告)号：KR1020030048491A

公开(公告)日：2003-06-25

申请号：KR1020010078249

申请日：2001-12-11

Applicant: 현대자동차주식회사

Inventor： 정범구

IPC: C22C38/04

Abstract: PURPOSE: A steel tube with high strength and formability for hydroforming process is provided which reduces press process, manufacturing cost and product weight by increasing yield strength, elongation and work-hardening exponent, thereby improving hydroforming formability compared with an existing material. CONSTITUTION: The steel tube with high strength and formability for hydroforming process comprises 0.03 to 0.05 wt.% of carbon, 0.5 to 0.8 wt.% of manganese, 0.04 to 0.07 wt.% of phosphorus, less than 0.01 wt.% of sulfur, 0.03 to 0.06 wt.% of aluminum and a balance of Fe, wherein 0.03 wt.% or more of carbon (C) is added to a composition for a steel sheet for the steel tube as an element for increasing strength, and 0.05 wt.% or less of carbon is preferably contained in the composition to prevent formability deterioration of the steel sheet, 0.5 to 0.80 wt.% of manganese (Mn) is contained in the composition to increase strength of the steel sheet as a substitutional solid solution, it is not preferable that content of manganese exceeds 0.80 wt.% as formability is lowered, phosphorus (P) as a substitutional solid solution for increasing strength of the steel tube is added to the composition in an amount of 0.04 wt.% or more, the content of the phosphorus is limited to 0.07 wt.% or less as the phosphorus is deposited on the grain boundary to show brittleness if it is excessively contained in the composition, sulfur (S) is limited to less than 0.01 wt.% as it causes brittleness in the steel sheet, aluminum (Al) is added to the composition in an amount of 0.03 wt.% or more as a deoxidizer so that nonmetallic inclusions are reduced by removing oxygen in the steel sheet, and content of aluminum does not exceed 0.06 wt.% so that formability is not deteriorated.

Abstract translation: 目的：提供用于液压成型工艺的高强度和成形性的钢管，通过提高屈服强度，伸长率和加工硬化指数，降低冲压加工，制造成本和产品重量，从而提高与现有材料相比的液压成形性。 构成：用于液压成型工艺的高强度和成形性的钢管包含0.03〜0.05重量％的碳，0.5〜0.8重量％的锰，0.04〜0.07重量％的磷，小于0.01重量％的硫， 0.03〜0.06重量％的铝和余量的Fe，其中，作为增强强度的元素用于钢管的钢板的组合物中加入碳（C）为0.03重量％以上，0.05重量％ 为了防止钢板的成形性劣化，优选在组合物中含有碳以下％以下，组合物中含有0.5〜0.80重量％的锰（Mn），以提高作为取代固溶体的钢板的强度， 不优选，当成型性降低时，锰的含量超过0.80重量％，作为用于提高钢管强度的替代固溶体的磷（P）以0.04重量％以上的量添加到组合物中， 磷的含量被限制在0.07重量％以下 如果组合物中含有过多的磷，则沉积在晶界上显示出脆性，硫（S）被限制在小于0.01重量％，因为钢板中脆性增加，铝（Al）被添加到 作为脱氧剂的组合物的量为0.03重量％以上，从而通过除去钢板中的氧而使非金属夹杂物减少，铝的含量不超过0.06重量％，成形性不劣化。