The invention discloses an alloy coating bushing which comprises a steel backing layer, a substrate layer, a nickel grid layer and a friction-reducing layer which are sequentially arranged.

本发明公开了一种合金镀层轴瓦，包括依次设置的钢背层、基底层、镍栅层和减摩层。

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The laser beam melts a portion of the steel core and the segment backing metal, forming a weld.

激光光束熔体部分钢铁核心和后盾金属部分，形成焊缝。

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The factors which influence the ball mill operating economically is more. First, the wear consumption of steel sphere and backing sheet is serious.

影响球磨机经济运行的因素较多，首先是钢球和衬板由于选材和匹配不当，磨损严重、消耗量大。

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In the midst of the commodity craze in 2007, Chen waged a hostile takeover of a Hong Kong-listed steelmaker that was ultimately defeated with the backing of steel tycoon Lakshmi Mittal.

FORBES: China's 'Steel Princess' Chased Down For Disappearing Assets

Vice-President Al Gore is keen to strengthen his ties with Richard Gephardt, the House minority leader and a champion of the steel industry, who is backing his presidential bid next year.

ECONOMIST: Steel scrap

Other coal producers started backing out of that market a decade ago, as their customers, the steel companies, suffered from an onslaught of cheap foreign steel.

FORBES: Not King Coal