Structure and Characteristics of Special Steel RL40 for Flexspline of Harmonic Reduction Gear

王洋; 王欢; 张朝磊; 王浩; 张旭; 苗红生

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Structure and Characteristics of Special Steel RL40 for Flexspline of Harmonic Reduction Gear

更新时间：2026-01-21

- Structure and Characteristics of Special Steel RL40 for Flexspline of Harmonic Reduction Gear
- Special Steel Vol. 42, Issue 3, Pages: 76-78(2021)
- 作者机构：
  
  1. 北京中技克美谐波传动股份有限公司
  2. 北京科技大学材料科学与工程学院
  3. 西宁特殊钢股份有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：04 October 2020，
  
  Online First：15 March 2022，
  
  Published：15 March 2021
- 稿件说明：
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王洋, 王欢, 张朝磊, et al. Structure and Characteristics of Special Steel RL40 for Flexspline of Harmonic Reduction Gear[J]. Special Steel, 2021, 42(3): 76-78.
DOI：

王洋, 王欢, 张朝磊, et al. Structure and Characteristics of Special Steel RL40 for Flexspline of Harmonic Reduction Gear[J]. Special Steel, 2021, 42(3): 76-78. DOI：

摘要

通过光学显微定量分析和热膨胀实验

研究了柔轮用钢RL40（/%:0.40C

0.90Cr

1.85Ni

0.25Mo

0.05Nb

0.016Ti）的微观组织、相变点和奥氏体晶粒粗化规律等材料基本特性。结果表明:轧材组织为贝氏体+马氏体

原始奥氏体晶粒平均尺寸为14.0 μm

晶粒度级别为9.09.5

平均标准偏差均在0.46~0.48;相变点Ac

为729℃

为769 ℃

Ms点为281 ℃;奥氏体晶粒粗化温度为1 000℃。

Abstract

The materials basic characteristics of structure

austenite grain coarsening and phase transformation point of RL40 steel for flexpline (/% ：0.40C

0.90Cr

l. 85Ni

0.25Mo

0.05Nb

0.016Ti) has been studied by the quantitative analysis of optical microscopy and thermal expansion experiment. The results show that the microstructure of the rolled bar is bainite + martensite

the average grain size of primary austenite is 14. 0 μm

and the austenite grain size rating is 9. 0 ~ 9. 5

and the average standard deviation is 0. 46 ~ 0. 048. The transformation point Ac

is 729 ℃

is 769 ℃

Ms is 28 ℃

and the austenite grain coarsening temperature is 1 000 ℃.

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