Abstract: 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 - 0.90C, 5.8 - 6.2W, 4. 6 - 5.0Mo, 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.

摘要： 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。

关键词: 高速钢M2, 电渣重熔, 锭型, 压缩比, 碳化物不均匀度