Laser beam welding is a new technique for the food can making.This research studied the welding technology and parameters for the tin-plate can and their influences on welding speed and quality,investigated the micros...Laser beam welding is a new technique for the food can making.This research studied the welding technology and parameters for the tin-plate can and their influences on welding speed and quality,investigated the microstructure and properties of the weld,analysed distribution of tin in the weld metal and carried out the flanging test of the can body.The results show that laser weld- ing of the can body is characterized by high welding speed,fine appearance, good quality and stable and reliable process.This technology can fulfill the re- quirements of can making.展开更多
The adhesion between the ion plated TiN coating and the base metal is improved by adding Y.The machenism of the effect of Y has been discussed as well.
目的研究马口铁包装水果罐头中锡的浓度变化和形态分布。方法采用电感耦合等离子体串联质谱法(inductively coupled plasma tandem mass spectrometry,ICP-MS/MS)测定马口铁包装水果罐头的锡含量,并分析锡浓度随储存时间、加热次数的变...目的研究马口铁包装水果罐头中锡的浓度变化和形态分布。方法采用电感耦合等离子体串联质谱法(inductively coupled plasma tandem mass spectrometry,ICP-MS/MS)测定马口铁包装水果罐头的锡含量,并分析锡浓度随储存时间、加热次数的变化特点;采用高效液相色谱电感耦合等离子体串联质谱法(high performance liquid chromatography-inductively coupled plasma tandem mass spectrometry,HPLC-ICP-MS/MS)测定并分析罐头中锡的形态分布。结果镀锡马口铁包装水果罐头中锡含量在生产日期3个月内为27.17~183.81mg/kg,生产日期12个月时为54.56~265.44mg/kg,锡浓度随储存时间、加热次数而明显增加,溶出锡为无机形态,以二价锡Sn[II]为主,未检测到锡的有机形态。结论马口铁包装水果罐头中锡随储存时间和加热次数而大量增加,但都以无机锡的形态存在,因吸收利用率低,毒性较低;尽量选择靠近生产日期的产品,且不要罐内加热食用。展开更多
文摘Laser beam welding is a new technique for the food can making.This research studied the welding technology and parameters for the tin-plate can and their influences on welding speed and quality,investigated the microstructure and properties of the weld,analysed distribution of tin in the weld metal and carried out the flanging test of the can body.The results show that laser weld- ing of the can body is characterized by high welding speed,fine appearance, good quality and stable and reliable process.This technology can fulfill the re- quirements of can making.
文摘The adhesion between the ion plated TiN coating and the base metal is improved by adding Y.The machenism of the effect of Y has been discussed as well.
文摘目的研究马口铁包装水果罐头中锡的浓度变化和形态分布。方法采用电感耦合等离子体串联质谱法(inductively coupled plasma tandem mass spectrometry,ICP-MS/MS)测定马口铁包装水果罐头的锡含量,并分析锡浓度随储存时间、加热次数的变化特点;采用高效液相色谱电感耦合等离子体串联质谱法(high performance liquid chromatography-inductively coupled plasma tandem mass spectrometry,HPLC-ICP-MS/MS)测定并分析罐头中锡的形态分布。结果镀锡马口铁包装水果罐头中锡含量在生产日期3个月内为27.17~183.81mg/kg,生产日期12个月时为54.56~265.44mg/kg,锡浓度随储存时间、加热次数而明显增加,溶出锡为无机形态,以二价锡Sn[II]为主,未检测到锡的有机形态。结论马口铁包装水果罐头中锡随储存时间和加热次数而大量增加,但都以无机锡的形态存在,因吸收利用率低,毒性较低;尽量选择靠近生产日期的产品,且不要罐内加热食用。