摘要
利用理想临界直径、非线性方程和硬度分布函数等方法,对SAE8620H齿轮钢的淬透性进行了计算,并与实测结果进行了对比分析。结果发现,试验钢淬透性较低,距淬火端3~9 mm范围内硬度变化达到3 HRC/mm。采用理想临界直径预测模型和非线性方程预测模型计算J9和J15点硬度与实测结果偏差不到2 HRC,但J5点硬度偏差超过2 HRC;采用硬度分布函数预测模型计算J9和J15点硬度误差分别达到6.1 HRC和3.8 HRC,经修正后的硬度分布函数预测模型在J5、J9和J15点硬度预测误差均小于2HRC,可用于SAE8620H齿轮钢淬透性预测。
Hardenability of SAE 8620 H gear steel was calculated by means of ideal critical diameter model,nonlinear equation model and hardness distribution model,then compared with the measured hardness values. The results show that the hardenability of the SAE 8620 H steel is low,and a decreasing rate of hardness is 3 HRC / mm in the distance of 3 mm to 9 mm from the quenched end. It also shows that the error of predicted values in the distance of 9 mm and 15 mm from quenched end are less than 2 HRC compared with the measured one by using ideal critical diameter model and nonlinear equation model,while the error exceeds 2 HRC in the distance of 5 mm from quenched end.The results calculated by modified hardness distribution model show that the predicted values in the distance of 9 mm and 15 mm from quenched end decrease from 6. 1 HRC and 3. 8 HRC to less than 2 HRC. Therefore,modified distribution model can be used to calculate the hardenability of SAE 8620 H gear steel.
出处
《金属热处理》
CAS
CSCD
北大核心
2016年第2期188-192,共5页
Heat Treatment of Metals
基金
国家自然科学基金青年基金项目(51301042)
关键词
齿轮钢
淬透性
预测模型
gear steel
hardenability
prediction model
作者简介
作者简介：曹燕光（1985-），男，博士生，主要从事合金结构钢研究，联系电话：010-62183384．E-mail：ustbcao@163．com
