Niobium-containing alloying hot-galvanizing steel for automobile outer cover part and manufacturing method of steel

A technology of niobium alloying and outer covering parts, which is applied in the field of steel manufacturing, can solve problems such as unsatisfactory corrosion resistance, and achieve the effects of good isotropy, good corrosion resistance, and long service life

Inactive Publication Date: 2015-10-07
WUHAN IRON & STEEL (GROUP) CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the corrosion resistance of the outer covering of the car body is the main factor determining the service life of the car. The steel plate of the outer covering of the car should have the ability to resist atmospheric corro

Method used

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  • Niobium-containing alloying hot-galvanizing steel for automobile outer cover part and manufacturing method of steel
  • Niobium-containing alloying hot-galvanizing steel for automobile outer cover part and manufacturing method of steel
  • Niobium-containing alloying hot-galvanizing steel for automobile outer cover part and manufacturing method of steel

Examples

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Example Embodiment

[0023] Below in conjunction with accompanying drawing and specific embodiment the present invention will be described in further detail:

[0024] Examples 1 to 5 The niobium-containing alloyed hot-dip galvanized steel for the outer cover of automobiles, the chemical composition and weight percentage in the steel are designed according to Table 1 respectively.

[0025] Chemical composition design in each embodiment steel of table 1

[0026]

[0027] Embodiments 1 to 5 The manufacturing methods of steels for alloyed hot-dip galvanized automobile outer coverings containing niobium all include steelmaking, hot rolling, cold rolling, continuous annealing and alloying galvanizing processes in sequence, and the difference is that in the manufacturing process The process parameters involved in different processes are designed differently, and the specific process parameters are designed in Table 2 below.

[0028] The processing parameters of each embodiment of table 2

[0029] ...

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Abstract

The invention discloses niobium-containing alloying hot-galvanizing steel for an automobile outer cover part. The steel comprises the chemical components by weight percentage: smaller than or equal to 0.003 percent of C, smaller than or equal to 0.01 percent of Si, 0.06 percent to 0.15 percent of Mn, smaller than or equal to 0.015 percent of P, 0.01 percent to 0.04 percent of Nb, 0.02 percent to 0.05 percent of Ti, 0.015 percent to 0.04 percent of Als, smaller than or equal to 0.01 percent of S, smaller than or equal to 0.003 percent of N and the rest of Fe and unavoidable impurities. Besides, the invention also provides a corresponding manufacturing method. The produced steel for the outer cover part has low strength and very high deep drawability, meanwhile has a lower deltar value and better coating quality, and has good isotropy and excellent welding performance.

Description

technical field [0001] The invention relates to a steel material manufacturing technology, in particular to a niobium-containing alloyed hot-dip galvanized steel for an outer cover part of an automobile and a manufacturing method thereof. Background technique [0002] With the development of my country's automobile industry, especially the "blowout" development of my country's automobile market in recent years, new requirements have been put forward for the performance of automobile materials. As the material of automobile body panels, the formability of steel plates will directly determine the scrap rate of stamping processing and the life of stamping dies, and the performance of coatings also determines the corrosion resistance and service life of automobiles. Alloyed IF steel has become the main steel for automobile body panels due to its excellent processing and forming properties and anti-corrosion properties. It is widely used in various automobile manufacturers, espec...

Claims

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Application Information

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IPC IPC(8): C22C38/14C21D8/00
Inventor 潘利波杜小峰田德新陈宇孙方义冯冠文周文强
Owner WUHAN IRON & STEEL (GROUP) CORP
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