本文選題：鑲鑄法 + 軋輥　； 參考：《昆明理工大學(xué)》2017年碩士論文

【摘要】：軋輥在耐磨行業(yè)中的運(yùn)用比較廣泛,相對(duì)于單一材料的軋輥,雙金屬?gòu)?fù)合軋輥的耐磨性能更好,使用壽命更長(zhǎng)。以前,研究人員對(duì)軋輥的研究主要集中在單一材料上,或者是對(duì)雙金屬?gòu)?fù)合軋輥的凝固過(guò)程進(jìn)行實(shí)驗(yàn)研究,運(yùn)用數(shù)值模擬方法對(duì)雙金屬?gòu)?fù)合軋輥凝固過(guò)程進(jìn)行理論研究的較少。本文運(yùn)用ANSYS有限元軟件對(duì)鑲鑄法制備雙金屬?gòu)?fù)合耐磨軋輥的凝固過(guò)程進(jìn)行了數(shù)值模擬,主要包括凝固過(guò)程溫度場(chǎng)的模擬和凝固過(guò)程應(yīng)力場(chǎng)的模擬。本文研究了在三種不同的澆注溫度下(1300℃、1400℃、1500℃),雙金屬?gòu)?fù)合耐磨軋輥凝固過(guò)程的溫度場(chǎng)和熱應(yīng)力場(chǎng),通過(guò)對(duì)模擬的結(jié)果分析表明,澆注溫度越高,凝固的速度越緩慢,熱應(yīng)力也越大,也越容易出現(xiàn)縮孔縮松等缺陷;澆注溫度偏低,凝固速度快,也會(huì)導(dǎo)致鑄件凝固過(guò)程不均勻等問(wèn)題。所以在鑄件實(shí)際的澆注過(guò)程中選取澆注溫度為1400℃,可以有效地防止縮孔的產(chǎn)生。同時(shí)研究了三種不同形狀的輥芯對(duì)雙金屬?gòu)?fù)合耐磨軋輥凝固過(guò)程的溫度場(chǎng)和應(yīng)力場(chǎng)的影響,通過(guò)對(duì)模擬的結(jié)果分析表明,在凝固初期,輥芯形狀對(duì)鑄件凝固過(guò)程的溫度場(chǎng)分布影響較小;在凝固中期,長(zhǎng)方體輥芯的鑄件的凝固速度最快,六棱柱輥芯的鑄件的凝固速度最慢,圓柱體輥芯的鑄件的凝固速度較為適宜。六棱柱輥芯的鑄件受到的熱應(yīng)力大于長(zhǎng)方體輥芯的鑄件受到的熱應(yīng)力,長(zhǎng)方體輥芯的鑄件受到的熱應(yīng)力大于圓柱體輥芯的鑄件受到的熱應(yīng)力。本文運(yùn)用Abaqus對(duì)凝固過(guò)程的溫度場(chǎng)和應(yīng)力場(chǎng)進(jìn)行了驗(yàn)證性模擬,結(jié)果表明Abaqus模擬計(jì)算的結(jié)果與ANSYS計(jì)算的結(jié)果一致,從仿真模擬的角度驗(yàn)證了ANSYS對(duì)雙金屬?gòu)?fù)合耐磨軋輥凝固過(guò)程溫度場(chǎng)和應(yīng)力場(chǎng)模擬的準(zhǔn)確性和可靠性。同時(shí)對(duì)ANSYS模擬之后的參數(shù)進(jìn)行了優(yōu)化,將優(yōu)化之后的參數(shù)運(yùn)用到驗(yàn)證性實(shí)驗(yàn)當(dāng)中,通過(guò)實(shí)驗(yàn)澆注出來(lái)的鑄件與ANSYS模擬優(yōu)化之后的結(jié)果比較吻合,從實(shí)驗(yàn)的角度驗(yàn)證了 ANSYS對(duì)雙金屬?gòu)?fù)合材料進(jìn)行數(shù)值模擬的準(zhǔn)確性和可靠性,說(shuō)明數(shù)值模擬技術(shù)對(duì)實(shí)際的鑄造工藝具有一定的指導(dǎo)意義。
[Abstract]:The roll is widely used in the wear-resistant industry. Compared with the single material roll, the bimetallic compound roll has better wear resistance and longer service life. In the past, researchers mainly focused on a single material, or the solidification process of bimetallic composite roll was studied experimentally, but few of them studied the solidification process of bimetallic compound roll by numerical simulation method. In this paper, the numerical simulation of solidification process of bimetallic composite wear resistant roll prepared by inlay casting method is carried out by using ANSYS finite element software, including the simulation of temperature field during solidification process and the simulation of stress field during solidification process. In this paper, the temperature field and thermal stress field of bimetallic composite wear resistant roll during solidification are studied under three different pouring temperatures. The results of simulation show that the higher the pouring temperature, the slower the solidification rate. The larger the thermal stress is, the more easily the defects such as shrinkage and porosity will occur, and the lower pouring temperature and the faster solidification speed will lead to the inhomogeneous solidification process of castings. Therefore, the casting temperature of 1400 鈩，

本文編號(hào)：2021211