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Low-carbon Mn-Cr steel for engine camshaft and manufacturing method thereof

A low-carbon manganese-chromium steel and carbon-manganese-chromium steel technology, which is applied to high-performance low-carbon manganese-chromium steel for high-power engine camshafts and its manufacturing field, can solve the problems that high-power engines cannot meet high performance, and achieve internal Good quality, optimized design, high purity effect

Inactive Publication Date: 2010-08-18
LAIWU IRON & STEEL GRP
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The traditional materials for manufacturing camshafts are 20CrH gear steel and other materials. Due to the limitations of hardenability and performance of this steel, it can no longer meet the requirements of high performance in the fields of high-power engines.

Method used

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  • Low-carbon Mn-Cr steel for engine camshaft and manufacturing method thereof

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Embodiment Construction

[0042] The technical solutions of the present invention will be specifically described below in conjunction with the embodiments, but are not limited thereto.

[0043] The low-carbon manganese-chromium steel of the present invention is smelted by UHP (exceeding power electric furnace), LF (extra-furnace refining), VD vacuum degassing treatment process, continuous casting casting slab, and hot rolling lumber process to produce steel. The embodiment specifically illustrates how the present invention is implemented with the production process of Φ90mm steel.

[0044] The production process steps of low carbon manganese chromium steel are:

[0045] (1) Smelting and alloying, using electric furnace smelting, the end point [C]≥0.10%, P≤0.015%, the content of residual elements meets the design requirements, and the temperature of molten steel reaches 1620~1650℃ for tapping; LF refining outside the furnace, refining slag The alkalinity is controlled at 2.5-3.5, and the white slag is ...

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Abstract

The invention relates to a low-carbon Mn-Cr steel for a camshaft and a manufacturing method thereof. The steel comprises the following components in percentage by weight: 0.17-0.22% of C, 0.17-0.37% of Si, 1.00-1.50% of Mn, 1.00-1.50% of Cr, 0.005-0.025% of P, 0.001-0.020% of S, 0.01-0.20% of Cu, 0.01-0.20% of Ni, 0.010-0.060% of Al, 0-0.15*10-4% of <0> and the balance of Fe and inevitable impurity. The manufacturing method comprises: smelting, alloying, continuously casting, pouring, casting blank, carrying out hot rolling technology and electrosmelting; the terminal point <C> =>0.10%, P <=0.015%, and steel tapping is carried out at the temperature of 1620-1650 DEG C; and LF external refining is carried out, and VD vacuum deaeration is carried out. The invention adopts complete-protection continuously casting, pouring, casting blank and hot rolling to prepare the material. The low-carbon Mn-Cr steel of the invention has high quenching degree and high purity and is used for manufacturing large-power engine camshafts.

Description

technical field [0001] The invention belongs to the technical field of hardenability-preserving structural steels, and in particular relates to a high-performance low-carbon manganese-chromium steel for a camshaft of a high-power engine and a manufacturing method thereof. Background technique [0002] The camshaft is one of the key parts in the gas distribution mechanism of an internal combustion engine. It is used to control the timely opening and closing of the valves according to a certain working order and distribution phase, and to ensure that the valves have sufficient lift, which plays a decisive role in the performance of the entire gas distribution system. effect. During work, there is high periodic contact stress and relatively fast relative sliding speed between the cam surface and the rocker arm or tappet, and it needs to bear a large torque, which requires the camshaft to have sufficient toughness and rigidity. The cam surface It has good wear resistance and im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/42C21C5/52B21B37/74
CPCY02P10/20
Inventor 申景霞戈文英翟正龙孙丰军卢栋庄辉马传庆卢爱风张海霞范黎明窦圣朋
Owner LAIWU IRON & STEEL GRP
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