Effect of Ti and Normalizing Process on Low Temperature Impact Toughness of Nb-V-Ti Microalloying Steel 16MnT for Motor Shaft

邬中华; 陈金虎; 乔晓梅; 楚宝帅

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Effect of Ti and Normalizing Process on Low Temperature Impact Toughness of Nb-V-Ti Microalloying Steel 16MnT for Motor Shaft

更新时间：2026-01-21

- Effect of Ti and Normalizing Process on Low Temperature Impact Toughness of Nb-V-Ti Microalloying Steel 16MnT for Motor Shaft
- Special Steel Vol. 38, Issue 6, Pages: 60-62(2017)
- 作者机构：
  
  山西太钢不锈钢股份有限公司技术中心,太原,030003
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：08 June 2017，
  
  Online First：15 July 2022，
  
  Published：15 July 2017
- 稿件说明：
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邬中华, 陈金虎, 乔晓梅, et al. Effect of Ti and Normalizing Process on Low Temperature Impact Toughness of Nb-V-Ti Microalloying Steel 16MnT for Motor Shaft[J]. Special Steel, 2017, 38(6): 60-62.
DOI：

邬中华, 陈金虎, 乔晓梅, et al. Effect of Ti and Normalizing Process on Low Temperature Impact Toughness of Nb-V-Ti Microalloying Steel 16MnT for Motor Shaft[J]. Special Steel, 2017, 38(6): 60-62. DOI：

摘要

试验16MnT钢（/%:0.14~0.15C

0.27~0.30Si

1.40Mn

0.008~0.010P

0.003~0.004S

0.020~0.025Nb

0.10V

0.002~0.08Ti，0.025~0.027Al，0.0043~0.0053N）的生产工艺流程为60t EAF-LF-VD-5.8t铸锭-锻造Ф190~250mm棒材-920℃正火。检验结果表明

0.08%Ti 16MnT钢锻造正火后-20℃冲击功为6~16J

低于标准值34J。分析结果得出

0.08%Ti钢中存在大量TiN和延晶Nb-Ti（C

N）析出相

-20℃钢的断口为典型沿晶脆性断裂

且锻材断面的组织不均匀

表面为索氏体

心部为铁素体+珠光体。通过将钢中Ti含量降至0.002%

正火风雾冷却时锻材间距离为1.5m

使16MnT钢锻材的-20℃冲击功提高至132~288J。

Abstract

The production process flowsheet of tested steel 16MnT (/%: 0.14~0.15C

0.27〜0.30Si

1.40Mn

0.008~0.010P

0.003~0.004S

0.020~0.025Nb

0.10V

0.002〜0.08Ti

0.025~0.027Al

0.0043~0.0053N) is 60t EAF-LF-VD-5.8 t ingot casting-Ф190~250mm forging- normalizing at 920℃. Examination results show that the impact energy of forged-normalized 0.08%Ti steel 16MnT at -20°C is 6~16J

it is lower than the value of standard requirement-34J. The analysis results obtain that large amount TiN and along grain boundary precipitated phase Nb-Ti ( C

N) exist in 0.08%Ti steel and the fracture of steel at -20T is typical brittle fracture along grain boundary

and the structure of forged product section is non-homogeneous

at surface it is sorbite while at centre of section it is ferrite+pearlite. With decreasing the Ti content in steel to 0.002% and controlling the 1.5m distance between forgings during normalizing wind-fog cooling process

the impact energy of forged product of steel 16MnT at -20℃ increases to 132~288J.

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