2002•Coal Mine MachineryRequires access
A study on quenching technology in zero-time heat of circular chain using in mine
An Li
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Abstract
The regularity of the effect of heating temperature and tempering temperature on 20MnV steel's hardness and strength in zero_time holding quenching was researched by the orthogonal regressive principle.Experiment turns out that quenching temperature has remarkable influence on its hardness and tensile strength.Proper raised quenching temperature,20MnV steel's strength and hardness in zero_time holding quenching are higher than that of the conventional 880 ℃ quenching.On the basis of experiment,the process planning parameters of (920±10)℃ quenching and (460±20)℃ tempering are determined under the condition of zero_time heat preservation.