温度、湿度、固化剂酸度对呋喃树脂砂强度的影响
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摘要
探究了环境温度、湿度、固化剂酸度对呋喃树脂砂强度的影响。试验表明:环境温度过高或过低,初强度或者终强度都比较低,最适宜的温度范围在15～25℃;当环境湿度>90RH%时,呋喃树脂自硬砂强度急速下降,对湿度的敏感性极强,初强度只有0.3 MPa,终强度只有0.4 MPa;固化剂酸度过低,初强度或者终强度都比较低,固化剂酸度过高,初强度或者终强度都有可能为零,所以固化剂的酸度应根据铸造现场的要求随时调整。
This paper explored the effects of ambient temperature, humidity, curing agent acidity on the strength of furan resin sands. Experiments have shown that the ambient temperature is too high or too low, both the initial and final strengths is relatively low, so the suitable temperature is in the range is 15-25 ℃; when the ambient humidity is >90 RH%, the strength of self-curing furan resin sand rapidly decreases, which is very sensitive to to humidity, with the initial strength of only 0.3 MPa and the final strength of only 0.4 MPa; too low curing agent acidity leads to lower initial or final strength of furan resin sand, while too high curing agent acidity may make the initial or final strength be zero, so the acidity value of the curing agent should be adjueted on site according to the requirements.
This paper explored the effects of ambient temperature, humidity, curing agent acidity on the strength of furan resin sands. Experiments have shown that the ambient temperature is too high or too low, both the initial and final strengths is relatively low, so the suitable temperature is in the range is 15-25 ℃; when the ambient humidity is >90 RH%, the strength of self-curing furan resin sand rapidly decreases, which is very sensitive to to humidity, with the initial strength of only 0.3 MPa and the final strength of only 0.4 MPa; too low curing agent acidity leads to lower initial or final strength of furan resin sand, while too high curing agent acidity may make the initial or final strength be zero, so the acidity value of the curing agent should be adjueted on site according to the requirements.
引文
[1]李远才.铸型材料基础[M].北京:化学工业出版社,2009.
[2]谢明师,蒋乃隆.呋喃树脂自硬砂实用技术[M].北京:机械工业出版社,1995.
[3]刘昭荐.行业标准《铸造用自硬呋喃树脂》解读[J].机械工业标准化与质量,2009(4):106-667.
[4]马文,何龙,韩文.环保抗湿性自硬呋喃树脂的开发及其应用[J].铸造设备与工艺,2014(5):39-41.
[5]张祖烈.冷硬呋喃树脂砂[M].北京:新时代出版社,1983.
[6]Hoyt D F.Identifying and eliminating the variables that affect the performance of no-bake and cold-box binder systems[J].Transactions of the American Foundry Society,2007(115):261-279.
[2]谢明师,蒋乃隆.呋喃树脂自硬砂实用技术[M].北京:机械工业出版社,1995.
[3]刘昭荐.行业标准《铸造用自硬呋喃树脂》解读[J].机械工业标准化与质量,2009(4):106-667.
[4]马文,何龙,韩文.环保抗湿性自硬呋喃树脂的开发及其应用[J].铸造设备与工艺,2014(5):39-41.
[5]张祖烈.冷硬呋喃树脂砂[M].北京:新时代出版社,1983.
[6]Hoyt D F.Identifying and eliminating the variables that affect the performance of no-bake and cold-box binder systems[J].Transactions of the American Foundry Society,2007(115):261-279.