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Effects of Scratch on Quality of Phosphating Film for Cold Rolled Automobile Steel Sheet DC04
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Xiao-lei Zhang, Wei-yu Yang, Yan Liu, En-ze Liu
Science & Technology of Baotou Steel | 2022, 48(4) : 37 - 40
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Science & Technology of Baotou Steel | 2022, 48(4): 37-40
• Quality of Variety and Experiment and Research •
Effects of Scratch on Quality of Phosphating Film for Cold Rolled Automobile Steel Sheet DC04
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Xiao-lei Zhang, Wei-yu Yang, Yan Liu, En-ze Liu
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  • Inner Mongolia Baotou Steel Rare Earth Steel Plate Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China
Published: 2022-08-25
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The effects of surface morphology for cold rolled automobile steel on the morphology, compactness and phase composition of phosphating film are very important, but there would be inevitably some scratches in such processes as packaging and transportation. The effects of artificial scratches on the surface roughness, morphology of phosphating film and phase composition of cold rolled automobile steel DC04 are analyzed with such test equipment as the surface roughometer, scanning electron microscope and x-ray diffractometer. The results showed that the average value of surface roughness R a was 1.124 μm for mother blank of DC04, average value of peak density R P c was 76.5 cm-1, R a basically unchanged and R P c decreased slightly after artificial grinding; R a of all samples for DC04 changed a little, but R P c increased slightly compared with those before phosphating; local structure of phosphating film on the surface of sample with artificial scratch was discontinuous, content of incompact zinc phosphate tetrahydrate, Zn3(PO4)2·4H2O in the phosphating phase was 100%, content of compact zinc ferrous phosphate tetrahydrate, Zn2Fe(PO4)2·4H2O and value of “P ratio” were zero, so the phosphating effect was poor.

cold rolled automobile steel DC04  /  roughness  /  peak density  /  phosphating film  /  surface morphology
Xiao-lei Zhang, Wei-yu Yang, Yan Liu, En-ze Liu. Effects of Scratch on Quality of Phosphating Film for Cold Rolled Automobile Steel Sheet DC04[J]. Science & Technology of Baotou Steel, 2022 , 48 (4) : 37 -40 .
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  • Receive Date：2022-03-30
  • Online Date：2025-10-20
  • Published：2022-08-25
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  • Received：2022-03-30
Affiliations
    Inner Mongolia Baotou Steel Rare Earth Steel Plate 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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