Analysis on Pinhole Defect of  Φ183 mm Forged Billet of High Speed Steel M2 and Process Improvement

尤晓东; 郝世风; 邵青立; 何宁

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Analysis on Pinhole Defect of Φ183 mm Forged Billet of High Speed Steel M2 and Process Improvement

更新时间：2026-01-21

- Analysis on Pinhole Defect of Φ183 mm Forged Billet of High Speed Steel M2 and Process Improvement
- Special Steel Vol. 37, Issue 1, Pages: 50-53(2016)
- 作者机构：
  
  河冶科技股份有限公司,石家庄,052165
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：15 August 2015，
  
  Online First：25 August 2022，
  
  Published：25 August 2016
- 稿件说明：
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尤晓东, 郝世风, 邵青立, et al. Analysis on Pinhole Defect of Φ183 mm Forged Billet of High Speed Steel M2 and Process Improvement[J]. Special Steel, 2016, 37(1): 50-53.
DOI：

尤晓东, 郝世风, 邵青立, et al. Analysis on Pinhole Defect of Φ183 mm Forged Billet of High Speed Steel M2 and Process Improvement[J]. Special Steel, 2016, 37(1): 50-53. DOI：

摘要

M2高速钢(/%:0.86C

0.39Si

0.32Mn

0.015P

0.006S

6.00W

4.00Cr

4.80Mo

1.85V)Φ183 mm圆坯由2.0 t电渣锭(Φ500 mm)锻制而成。M2钢锻坯探伤缺陷率为33.33%~69.23%

主要为中心部位针孔缺陷。分析表明

针孔缺陷是钢锭偏析部位在开坯加热和锻制过程中产生过热形成的。通过将电渣重熔电流由8 000→6 800 A降至7 000→6 000 A

降低电渣重熔速度

开锻温度由1070~1090℃降至1030~1060℃

终锻温度由960~980℃C降至900~950℃以降低中间坯的中心温度等工艺措施

使M2钢 Φ183 mm锻坯的探伤缺陷率由50%降低到5.71%。

Abstract

The Φ183 mm round billet of high speed steel M2 (/% ： 0. 86C

0. 39Si

0. 32Mn

0. 015P

0. 006S

6. 00W

4. 00Cr

4. 80Mo

1. 85V) is forged from 2. 0 t ESR ingot （Φ500 mm). The nondestructive detect defect ratio of forged billet of steel M2 is 33. 3% ~ 69.23% and the main defect is pinhole at center position of billet. Analysis results show that due to producing overheating of billet during heating and forging process the segregation of ingot forms pinhole defect. With process measures including decreasing the ESR current from 8 000 → 6 800 A to 7 000 → 6 000 A to decrease remelting speed

decreasing the beginning forging temperature from 1 070 ~ 1 090 °C to 1 030 ~ 1 060 °C and decreasing the end forging temperature from 960 〜980 °C to 900 〜950 °C to decrease the center temperature of forging billet

the nondestructive detective defect ratio of 0183 mm forged billet of steel M2 decreases from 50% to 5. 71% .

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