小麦磨粉机磨辊材料抗磨损热处理工艺优化

植物磨料磨损是辊式制粉工业中磨辊磨损失效的主要原因,热处理工艺是磨辊材料（低铬白口铁）表面硬度强化的一般手段。该文选用与辊式制粉工况相似的磨损试验机进行试验,利用正交试验考察了不同工艺参数热加工对低铬白口铁抗小麦粉料磨损性能的影响,并择选出最优工艺组合。基于最优工艺组合,以低铬白口铁原始件为参照,综合质量损失、磨痕特征及扫描电镜形貌等手段提取磨损特征,考察最优热处理工艺对低铬白口铁抗小麦粉料磨损性能的强化效果。试验推荐最优热处理工艺组合为：960℃（1 h）空淬＋250℃（2 h）回火,实际生产推荐最优热处理工艺组合为：基于960℃淬火＋250℃回火的表面热加工;经最优热加工工艺处理的低铬白口...

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Bibliographic Details
Published in农业工程学报 Vol. 32; no. 21; pp. 271 - 276
Main Author 张克平 姜良朋 黄晓鹏
Format Journal Article
LanguageChinese
Published 甘肃农业大学工学院,兰州,730070 2016
Subjects
优化
农作物
小麦制粉
机械化
热处理
白口铁
磨料磨损
磨辊
磨料磨损
crops
heat treatment
磨辊
wheat milling
机械化
white iron
abrasive wear
农作物
optimization
优化
mechanization
小麦制粉
白口铁
热处理
roller
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ISSN1002-6819
DOI10.11975/j.issn.1002-6819.2016.21.037

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Summary:植物磨料磨损是辊式制粉工业中磨辊磨损失效的主要原因,热处理工艺是磨辊材料（低铬白口铁）表面硬度强化的一般手段。该文选用与辊式制粉工况相似的磨损试验机进行试验,利用正交试验考察了不同工艺参数热加工对低铬白口铁抗小麦粉料磨损性能的影响,并择选出最优工艺组合。基于最优工艺组合,以低铬白口铁原始件为参照,综合质量损失、磨痕特征及扫描电镜形貌等手段提取磨损特征,考察最优热处理工艺对低铬白口铁抗小麦粉料磨损性能的强化效果。试验推荐最优热处理工艺组合为：960℃（1 h）空淬＋250℃（2 h）回火,实际生产推荐最优热处理工艺组合为：基于960℃淬火＋250℃回火的表面热加工;经最优热加工工艺处理的低铬白口铁的磨损质量损失约为原始试样质量损失的42%,铸态组织内共晶碳化物断网现象明显,以半连续网状或孤立块状分布于基体;被磨面沟槽宽深度与棱脊峰谷值等磨痕特征及金属元素含量有所降低,试样硬度显著增加;磨损形式主要为微观切削、多次塑性变形与低周期疲劳磨损。该研究可为磨辊耐磨性能的提升以及降低加工过程对面粉的金属污染提供参考。
Bibliography:11-2047/S
Zhang Keping, Jiang Liangpeng, Huang Xiaopeng （College of Engineering, Gansu Agricultural University, Lanzhou 730070, China）
mechanization; optimization; crops; abrasive wear; wheat milling; roller; white iron; heat treatment
The wear of plant abrasive is the main reason to roller wear failure in wheat roller milling industry, while the heat treatment is the general strengthening means of surface hardness of low chromium white iron which is usually used as roller material. In this paper, 3 principles of abrasive wear were applied, and low chromium white iron was chosen as the test samples and wheat powder was chosen as abrasive. The wear test was conducted on wear test machine under the similar work process of industrial roller milling. The test was divided into 2 phases. In the first phase, 9 groups of samples were heat treated with different process parameters according to the design of orthogonal test, and then cooled to the room temperature by air cooling. The wear tests of wheat powder were conduc
ISSN:1002-6819
DOI:10.11975/j.issn.1002-6819.2016.21.037