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长城钢厂133张减机和3150挤压机配套上存在的主要问题是生产能力不平衡,生产钢种不相适应,原来的设计和该车间加热设备的生产能力也限制了张减能力的发挥。这些问题已有文章阐明,这里不再赘述。本文仅就长钢挤压车间的技术改造试谈几种设想。1.保留张减机,就地改造据了解,长钢的133张减机还是好用的。该厂挤压车间曾于1978年从首钢购进直径89mm、壁厚3.5～4mm、长度4—9m的直缝电焊钢管100吨,经再加热炉加热后,在张减机上张减,生产出直径分别为24.8～25mm、51.4～52.1mm、壁厚均为3.2～3.5mm 的成品钢管。这批钢管经12～15分钟、压力为300kg/cm~2 的水压试验,未见破裂;又按 YB242—63标准检验,质量完全合乎标准,达到中压无缝钢管的使用要求。该车间的步进式再加热炉结构也比较先进,步进周期可以满足每分
Great Wall Steel 133 and 3150 to reduce the extruder supporting the main problems exist in the production capacity is not balanced, the production of steel is not compatible with the original design and production capacity of the workshop heating equipment also limits the Zhang capacity to play . These problems have been stated in the article, not repeat them here. This article only talked about several ideas for the technological transformation of the long steel extrusion workshop. 1. Preserve Zhang reduction machines, local transformation It is understood that the long steel 133 reduction or easy to use. The extrusion plant in 1978, the plant had purchased from Shougang diameter 89mm, wall thickness 3.5 ~ 4mm, length 4-9m straight seam welded steel pipe 100 tons, after reheating furnace heating, the Zhang reduction machine Zhang Zhang reduction to produce Diameter of 24.8 ~ 25mm, 51.4 ~ 52.1mm, wall thickness of 3.2 ~ 3.5mm finished steel. These batches of steel after 12 to 15 minutes, the pressure of 300kg / cm ~ 2 hydraulic test, no rupture; again according to YB242-63 standard test, the quality completely in line with standards to achieve the use of medium-pressure seamless steel pipe requirements. The workshop’s step reheating furnace structure is also more advanced, step-by-step to meet the minute