3results about How to "Raise Strength Index" patented technology

The application discloses a kind of Q550D high-strength steel flat-position robot automatic welding methods, comprising the following steps: (1) carry out welding groove processing, do not leave blunt edge, and the gap of groove root is 1-3mm;(2) using solid argon-rich gas shielded welding to carry out backing layer welding;(3) using flux-cored wire CO2 gas shielded welding to carry out filling layer welding;(4) using flux-cored wire CO2 gas shielded robot automatic welding to carry out cover layer welding.The application solves the welding problem of single-sided welding double-sided forming butt joint weld under the condition of not sticking backing pad and not cleaning root, and can effectively guarantee the first-time flaw detection pass rate of butt joint weld;Using the robot automatic welding method filled with flux-cored wire shielded welding to fill or cover welding, the welding process has high degree of automation, and the appearance of weld after welding is uniformly and beautifully formed;The weld has good strength index and excellent low-temperature impact toughness index, and meets the anti-impact performance requirements of high-strength level crash barrier.

The invention provides a method for preparing natural-color semi-chemical pulp from bamboo reed, and belongs to the field of papermaking. The method makes full use of the advantages of rich fiber content and high yield of the bamboo reed, and fills the vacancy of domestic plant fiber raw materials. The technological method of the bamboo reed natural-color semi-chemical pulp gives full play to the characteristics of high bamboo reed fiber content, low raw material silicon content, low lignin content, easiness in pulping and good water filtration, develops and optimizes cooking, pulping and screening technologies, and is simple in equipment requirement and easy to popularize. The prepared bamboo reed natural-color semi-chemical pulp is excellent in tightness, ring crush resistance and tear strength, and is suitable for oil-proof paper and packaging paper products.

This invention relates to a method for manufacturing a reinforced concrete road cover plate with high toughness, characterized by the following specific manufacturing steps: S1: Concrete substrate preparation; S2: Cover plate pouring process; S3: Cover plate curing. The concrete cover plate provided by this invention achieves significant improvements in both lightweighting and mechanical properties. Compared to traditional reinforced concrete cover plates: while ensuring load-bearing capacity, the cover plate thickness of this invention is reduced by 62.5%, its self-weight is reduced by 70%, and its strength index is increased by 45.79%, effectively solving the problems of traditional cover plates being heavy and requiring excessive materials. Compared to a wire mesh concrete cover plate of the same size: the cover plate of this invention has a 20% lower self-weight and an 88.38% higher strength index.