碳钢轮毂的消失模铸造

介绍了利用消失模工艺生产碳钢轮毂件的试制过程,对碳钢轮毂铸件,模样组合,浇注系统,涂料涂挂烘干,装箱浇注等过程控制方面进行了深入探索和实践。     

高铬铸铁-碳钢复合板水平浇注铸造工艺

研究了厚度为40 mm高铬铸铁-碳钢复合板水平浇注铸造工艺,并对二者复合强度进行了检测.结果表明:当先浇注的定量高铬铸铁冷却到1080～1220℃时在其上再浇注碳钢均可获得牢靠的复合铸件.     

轮毂铸造工艺设计及数值模拟

轮毂是装在汽车轴上的金属部件,要求抗疲劳能力强。采用AnyCasting模拟软件对轮毂进行充型和凝固模拟以及缺陷预测,对浇注系统各浇道截面及尺寸进行详细计算,配合使用冒口和冷铁,将铸造缺陷减少到最低程度,大部分缺陷转移到冒口和浇注系统,从而找到最佳工艺参数,为轮毂生产提供了电脑辅助设计,保证了轮毂的生产质量。     

铝合金轮毂压铸模设计

分析了铝合金轮毂的结构特点 ,介绍了铝合金轮毂压铸模的结构 ,并详细说明了模具浇注系统、溢流系统、冷却系统、推出机构的设计     

风电轮毂铸件铸造工艺设计研究

针对2MW-5MW风电轮毂铸件铸造工艺进行分析,分别从不同铸造工艺方法对风电轮毂铸件的质量影响进行对比,分析了不同工艺方案的优缺点以及工艺设计方案关键要点。结果表明,采用主轴孔朝上的方案,厚大部位选用冒口和冷铁进行补缩平衡,浇注系统中设计过滤系统,同时选择大流量、低流速、无紊流浇注系统可以达到减小轮毂铸造缺陷,提高铸件质量的目的。     

专利摘要

<正>230301具有多浇口的浇注系统[世界知识产权组织] WO2023018964,2023.02.16 Renegar Henry, L.;Govindaswamy Suresh B.;Sanzhez-AraizaMiguel [美国]本发明涉及一种用于制造合金轮毂的浇注系统。更具体地，本发明涉及将熔融合金材料浇注到铸型型腔的优化。该系统用于制造合金轮毂铸件，主要包括：铸型，其中设置有用于形成合金轮毂的型腔；轮毂，包括表面部分和边缘部分；熔炉，将合金加热到熔融状态；给料箱，或加热箱，用于将熔炉连接到铸型。     

液态模锻AZ31镁合金汽车轮毂的性能分析

采用不同的浇注温度和比压对AZ31镁合金汽车轮毂进行了液态模锻成形,并进行了显微组织、耐磨损性能和耐腐蚀性能的测试与分析。结果表明:随比压和浇注温度的增加,轮毂试样的平均晶粒尺寸和磨损体积均先减小后增大,腐蚀电位先正移后负移,耐磨损性能和耐腐蚀性能先提升后下降。与30 MPa比压相比较,50 MPa比压时试样的平均晶粒尺寸和磨损体积分别减小了27.39%、41.67%,腐蚀电位正移了36 m V。与680℃浇注温度相比,700℃浇注时试样的平均晶粒尺寸和磨损体积分别减小了33.33%、47.5%,腐蚀电位正移了47 m V。AZ31镁合金汽车轮毂的液态模锻工艺参数优选为:50 MPa比压、700℃浇注温度。     

铝合金轮毂砂型重力铸造过程的数值模拟

对电动车铝合金轮毂在砂型重力铸造凝固过程中的温度场和速度场进行数值模拟。运用有限元模拟软件Procast,模拟了电动车轮毂砂型重力铸造过程,研究了不同组成与浇注工艺对温度场和速度场分布的影响规律。结果表明:数值模拟结果反映了材料组成与浇注工艺对温度场和速度场分布的影响规律。     

基于正交试验的铝合金轮毂铸造工艺参数优化

运用Pro CAST软件对铝合金轮毂的铸造过程进行了模拟,采用正交试验法对浇注温度和模具的初始温度进行了优化。在此基础上对轮毂的充型过程和凝固过程进行了分析,并预测了轮毂铸件的缩孔、缩松缺陷的位置及大小。模拟结果表明:在其它工艺条件不变的情况下,当浇注温度为710℃,上模温度为420℃,下模温度为360℃,侧模温度为370℃时,轮毂产生的缩孔、缩松缺陷最小。     

镁合金摩托车轮毂浇注系统的设计优化

以镁合金摩托车轮毂为例,设计了双向断环形横浇道和单向断环形横浇道两种浇注系统.在浇注温度680℃,模具预热温度250℃,压射速度3.0m/s,保压压力60 MPa的工艺条件下,用数值模拟软件对该轮毂的铸造工艺过程进行了仿真分析.结果表明:采用单向断环形横浇道的浇注系统比双向断环形横浇道浇注系统充型合理,能明显减少轮毂的卷气、夹杂等缺陷,且模具型腔加工更简单.     

消失模铸造浇注系统的选择

通过比较,找出了顶注、侧注、底注法各自的优缺点,从而认定,对内在质量要求严格的中小件宜采用顶注,对结构复杂的大而薄的铸件宜采用底注,下1/3处侧注及阶梯浇注系统是适用性最广、应用最多的浇注方式。通过生产实例进行了说明。     

薄壁铝合金铸件石膏型真空浇注加压凝固铸造工艺

对采用石膏型真空浇注加压凝固铸造工艺生产一项典型的铝合金薄壁铸件的工艺过程进行了探讨。通过对石膏型铸型制备工艺的控制及添加剂的合理使用,采用多点布局的开放式浇注系统,并对充型时间、浇注位置、铸型温度和金属液浇注温度等浇注工艺参数进行试验优化,最终确定了合理的浇注工艺参数组合,成功生产出满足技术要求的薄壁铝合金精铸件。     

封闭式浇注系统在解决夹渣缺陷上的应用

夹渣是砂型铸造中常见的一种铸造缺陷,尤其是铸件需要进行MT和UT检测的时候,夹渣缺陷是导致铸件报废的重要缺陷之一。封闭式浇注系统的应用能够很好地解决铸件夹渣问题,但是,需注意防止“伪封闭式浇注系统”,不同类型的浇注系统的设计要点也各不相同。     

基于ProCAST的履带板消失模铸造凝固过程数值模拟

运用ProCAST软件对ZG30SiMnMoV钢履带板铸造凝固过程进行了模拟,分析了铸件的缺陷受浇注温度的影响情况和铸件的有效应力受浇注速度、浇注温度的影响情况,并进行了试验验证。结果表明,当浇注温度为1610℃时,履带板内部的缩孔、缩松缺陷明显减少;铸件的有效应力受到浇注速度的影响不大,适当地降低浇注温度可显著降低铸件的有效应力,可以得到品质良好的铸件。     

Manufacture technique of semi-solid slurry of hypoeutectic Al-Si alloy by low superheat pouring and weak electromagnetic stirring

Semi-solid metal (SSM) process is a relatively new technology that offers distinct advantages over other near-net-shape casting processes, such as a more homogeneous microstructure, less porosity and segregation, and improved mechanical properties[1-3]. SSM can be divided into thixoforming and rheoforming, in which rheoforming is usually advantageous from the point of view of an energy and cost saving when compared with thixoforming, so rheoforming has been paid attention again by engineers i…     

浇注温度和细化剂对半固态A356合金组织的影响

采用低温铸造和晶粒细化复合工艺制备A356合金半固态坯料,研究了浇注温度和细化剂(Al-5Ti-1B)添加量对半固态坯料组织的影响。结果表明,随着浇注温度从715℃降到635℃,α-Al晶粒形貌从树枝晶向蔷薇状形态再到等轴晶组织变化,浇注温度越低,晶粒越细小圆整。当浇注温度降到615℃时,晶粒开始出现粗化和不均匀。在相同温度下,随着晶粒细化剂添加量的增加,晶粒更加细小,但细化效果随着添加量的增加变得不明显。当浇注温度低于635℃时添加细化剂,晶粒尺寸和形貌无明显变化。低过热度浇注和晶粒细化复合工艺制备A356合金半固态坯料的最佳工艺条件是:浇注温度为635~655℃,细化剂添加量为0.1%~0.2%。     

Effect of pouring temperature on semi-solid slurry of ZL101 alloy prepared by slightly electromagnetic stirring

The semi-solid slurry of ZL101 alloy is prepared by a combination technology of low superheat poudng and slightly electromagnetic stirring. The effects of pouring temperature on the slurry prepared by the technology are investigated. The results indicate that it is feasible to prepare the slurry with globular primary phases by low superheat pouring and slightly electromagnetic stirring, and that the pouring temperature has an important effect on the morphology and the size of primary α-Al in ZL101 alloy. By applying suitable slightly electromagnetic stirring combining with relatively increased pouring temperature, i.e., in a practical way to apply low superheat pouring technology, is capable of obtaining appropriate semi-solid slurry of ZL101 alloy with globular shape of primary phase. Compared with the samples made by low superheat pouring only without stirring, the samples prepared by applying both slightly electromagnetic stirring and low superheat pouring can enable to achieve the same grain size and morphology of the primary phase with that of pouring at 15-35℃ higher.     

再谈浇注系统的补缩作用

从浇注位置、浇口尺寸、浇注时间几个侧面研究了浇注过程在大型铸铁件补缩中的能动作用;指出合理的设计浇注系统和浇注工艺,是实现大型铸铁件补缩的有效途径。     

Research on semi-solid slurry of a hypoeutectic Al-Si alloy prepared by low superheat pouring and weak electromagnetic stirring

The semi-solid slurry of a hypoeutectic Al-Si alloy was manufactured by low superheat pouring and weak electromagnetic stirring. The effects of pouting temperature and stirring power on the semi-solid slurry were investigated. The results indicated that the semi-solid slurry to satisfy rheocasting can be manufactured by low superheat pouring and weak electromagnetic stirring. The pouring temperature （or superheat） and the stirring power remarkably affected the morphology of primary α-Al and the size of primary α-Al, and there is no obvious effect of stirring time on primary α-Al. Compared with the samples made by low superheat pouring with no stirring, the nucleation rate, particle morphology and grain size of primary α-Al in A356 were markedly improved by low superheat pouring and weak electromagnetic stirring. On the condition of weak electromagnetic stirring, the pouring temperature with low superheat can be suitably raised to reach the effectiveness obtained from the lower pouring temperature without stirring.     

Preparation of Semi-Solid AlSi7Mg Alloy Slurry

The semi-solid AlSi7Mg alloy slurry of large size was prepared by the low superheat pouring and weak electromagnetic stirring in this paper. The effects of pouring temperature and stirring power on the microstructure of the AlSi7Mg alloy slurry were studied. The results show that the semi-solid AlSi7Mg alloy slurry of 127mm in diameter can be prepared by the low superheat pouring and weak electromagnetic stirring technology and this new technology can save energy and make the pouring process convenient. When the liquid AlSi7Mg alloy is poured at 650 or 630, the solidified microstructure of the AlSi7Mg alloy slurry prepared by the weak electromagnetic stirring is remarkably improved compared with that of the slurry without stirring, the primary -Al grains appear rosette-like or spherical. When the pouring temperature is decreased, the shape of the primary -Al grains is gradually changed from dendritic-like grains to spherical grains. When the pouring temperature is appropriately increased, namely raised to a certain superheat, the pouring process becomes easier and an ideal spherical microstructure of the AlSi7Mg alloy slurry prepared by the weak electromagnetic stirring can also be obtained, in this experiment, when the stirring power is 0.36kW, the optimized pouring temperature parameter is 630.When the AlSi7Mg alloy slurry is prepared by the low superheat pouring and weak electromagnetic stirring, when the pouring temperature is 630,increasing the stirring power appropriately could gain better spherical primary -Al grains,but if the stirring power is increased to a certain value, the shape of the primary 冄-Al grains is not further improved, in this experiment, the optimized stirring power parameter is 0.36kW.