It consists of clustered comagmatic source volcanic apparatuses of fissutr type,volcanic collapse structure and glug of passive emplacement,There are five eruptive depositional and oruptive filling stages,The primary roc.
它包括同源成串的裂隙式火山机构、火山塌陷构造和塌陷被动侵位的岩塞。
Vacuum heattreatment of operation appliance forging die of 3Cr2W8V steel was suitable carried out,compared to salt bath heattreatment,the die has upper hardness and excellent toughness,the wear resisatnce of die surfance was enhanced,the defect of sink and stick was overcame,the life of die was improved.
3Cr2 W8 V钢制手术器械锻压成型模采用适当的真空热处理工艺 ,与盐浴处理相比 ,可获得较高的硬度和良好的韧性 ,增强模具表面的耐磨性 ,克服模膛塌陷、粘模等缺陷 ,提高了模具寿