电渣重熔锭的直径和压缩比对M2高速钢碳化物不均度的影响

Effect of Diameter of ESR Ingot and Reduction Ratio on Non-Uniformity of Carbide in High-Speed Steel M2

统计回归分析了M2高速钢（/%：0.85~0.90C,5.8~6.2W,4.6~5.0Mo,3.8~4.4Cr,1.75~1.95V）电渣锭直径（φ250 mm~φ400 mm）和压缩比（11.10~92.46）对钢材（φ26 mm~φ120 mm）碳化物不均度的影响,并建立了回归方程,以预测钢材的碳化物不均度级别。结果表明,当压缩比小于20时,随压缩比增加,钢中碳化物不均度降低显著,压缩比超过20时,随压缩比增加,钢中碳化物不均度降低较小;相同压缩比下小规格钢材锻轧材碳化物不均度级别较小。

The statistics and regression analysis on the effect of diameter of ESR ingot（φ250 mm ~φ400 mm） and reduction ratio（11.10 ~92.46） of high speed steel M2（/%：0.85 ~0.90 C,5.8 ~6.2W,4.6 ~5.OMo,3.8-4.4Cr,1.75 ~ 1.95V） on non-uniformity of carbide in steel products（φ26 mm ~φ120 mm） have been carried out,and a regression equation to predict the rating of non-uniformity of carbide in products is established.Results show that as reduction ratio is less than 20,with increasing reduction ratio the non-uniformity of carbide in steel decreases markedly,while as reduction ratio is more than 20,with increasing reduction ratio the non-uniformity of carbide in steel decreases lesser;with same reduction ratio the rating of carbide non-uniformity in smaller diameter steel forged and rolled products is smaller.