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Self-lubrication alloying galvanized steel plate for automobiles and preparation method of self-lubrication alloying hot galvanized steel plate

A hot-dip galvanized steel sheet and self-lubricating technology, which is applied in the field of self-lubricating alloyed hot-dip galvanized steel sheet, can solve the problems of complex production process and high production cost, and achieve the expansion of deep drawing processing range, high production efficiency, and avoidance of process cumbersome effect

Inactive Publication Date: 2015-03-04
WUHAN IRON & STEEL (GROUP) CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The alloyed hot-dip galvanized steel sheets of the three are all added with Nb alloy, the production cost is high, and the production process to achieve self-lubricating performance is complicated

Method used

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  • Self-lubrication alloying galvanized steel plate for automobiles and preparation method of self-lubrication alloying hot galvanized steel plate
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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The weight percentage of chemical composition is: C: 0.0012%, Si: 0.009%, Mn: 0.087%, P: 0.01%, S: 0.0063%, Als: 0.031%, Ti: 0.07%, N: 0.0025, and the rest is Fe and unavoidable impurities. The slab heating temperature is 1280°C, the hot rolling finishing temperature is 920°C, the coiling temperature is 710°C, the cold rolling reduction rate is 82%, the continuous annealing soaking temperature is 825°C, and the strip steel entering zinc pot temperature is 480°C , the alloying temperature is 520°C, the fair elongation is 1%, and the self-lubricating coating on one side is 0.3g / m 2 , drying plate temperature is 80 ℃. According to embodiment 1, the mechanical properties of steel are detected, yield strength R P0.2 : 165MPa, tensile strength Rm: 293MPa, elongation A 80mm %: 47.5, r: 2.0, the strength and plasticity match well.

[0039] Ordinary alloyed hot-dip galvanized sheet and self-lubricating alloyed hot-dip galvanized sheet coated with self-lubricating paint were ...

Embodiment 2

[0043] The weight percentage of chemical composition is: C: 0.0008%, Si: 0.008%, Mn: 0.097%, P: 0.013%, S: 0.0058%, Als: 0.032%, Ti: 0.074%, N: 0.0023, and the rest is Fe and unavoidable impurities. The slab heating temperature is 1280°C, the hot rolling finishing temperature is 930°C, the coiling temperature is 720°C, the cold rolling reduction rate is 85%, the continuous annealing soaking temperature is 830°C, and the strip steel entering zinc pot temperature is 490°C , the alloying temperature is 530°C, the fair elongation is 1.2%, and the self-lubricating coating on one side is 0.42g / m 2 , drying plate temperature is 85 ℃. According to embodiment 2, the mechanical properties of steel are detected, yield strength R P0.2 : 160MPa, tensile strength Rm: 285MPa, elongation A 80mm %: 45, r: 2.1, the strength and plasticity match well.

[0044] Ordinary alloyed hot-dip galvanized sheet and self-lubricating alloyed hot-dip galvanized sheet coated with self-lubricating paint we...

Embodiment 3

[0048] The weight percentage of chemical composition is: C: 0.001%, Si: 0.007%, Mn: 0.096%, P: 0.01%, S: 0.005%, Als: 0.03%, Ti: 0.069%, N: 0.0022, and the rest is Fe and unavoidable impurities. The slab heating temperature is 1280°C, the hot rolling finishing temperature is 925°C, the coiling temperature is 735°C, the cold rolling reduction rate is 80%, the continuous annealing soaking temperature is 835°C, and the strip steel entering zinc pot temperature is 485°C , the alloying temperature is 525°C, the fair elongation is 0.95%, and the self-lubricating coating on one side is 0.4g / m 2 , drying plate temperature is 90 ℃. According to embodiment 2, the mechanical properties of steel are detected, yield strength R P0.2 : 162MPa, tensile strength Rm: 290MPa, elongation A 80mm %: 47.5, r: 2.3, the strength and plasticity match well.

[0049] Ordinary alloyed hot-dip galvanized sheet and self-lubricating alloyed hot-dip galvanized sheet coated with self-lubricating paint were...

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Abstract

The invention discloses a self-lubrication alloying hot galvanized steel plate for automobiles and a preparation method of the self-lubrication alloying galvanized steel plate. The self-lubrication alloying galvanized steel plate is prepared from the following chemical components in percentage by mass: 0.0007-0.002% of C, less than or equal to 0.01% of Si, 0.08-0.15% of Mn, less than or equal to 0.015% of P, less than or equal to 0.009% of S, 0.02-0.04% of Als, 0.06-0.09% of Ti, less than or equal to 0.004% of N, and the balance of Fe and inevitable impurities. The preparation method comprises the following steps: pre-treating molten iron, smelting in a converter, refining, performing continuous casting, performing hot continuous rolling, pickling, performing cold continuous rolling, annealing, performing hot galvanizing, alloying, rolling a self-lubrication coating by using a roller, drying, and finishing. By controlling the roller system polishing precision and the surface roughness of a roll coating machine, the roller coating process parameters, the temperature of a drying furnace, the machine set speed and the finishing process parameter, the self-lubrication property is achieved. The preparation method is low in production cost and simple in production process, when a self-lubrication alloyed plate prepared by using the preparation method is compared with an ordinary alloyed plate, the lubrication is remarkably improved, the stamping property is also remarkably improved, and the manufacturing of complex components can be completely met.

Description

technical field [0001] The invention relates to a self-lubricating alloyed hot-dip galvanized steel sheet, in particular to a self-lubricating alloyed hot-dip galvanized steel sheet for automobiles and a manufacturing method thereof. Background technique [0002] Alloyed galvanized steel sheet is obtained by hot-dip galvanizing the strip steel through a zinc bath with an aluminum content of 0.11% to 0.14%, and then heat treatment. Compared with hot-dip galvanized and electro-galvanized steel sheets, alloyed hot-dip galvanized steel sheets have superior corrosion resistance, welding performance and coating performance, and are widely used in the manufacture of automotive inner and outer panels. However, in industrial applications, the alloyed coating of the alloyed hot-dip galvanized steel sheet is prone to powdering and peeling, which reduces the quality of the coating and causes damage to the mold. [0003] By coating a layer of organic or inorganic film with lubricating f...

Claims

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Application Information

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IPC IPC(8): C22C38/28C22C33/04B21C37/02
Inventor 杜蓉涂元强蔡捷白会平雷泽红宋乙峰黄道兵杨宏武
Owner WUHAN IRON & STEEL (GROUP) CORP
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