Harbin Welding Institute Limited Company

Other

Kai Xu

Bo Wang

Yang Zhang

Haidong Yang

Chunyan Qu

Pengbo Wu

Chao Wei

Dezhi Wang

Hongfeng Li

Xiao Guo

Haimin Wang

Cheng Du

Wanbao Xiao

Hao Feng

Dongpeng Zhou

Changwei Liu

Yueyu Guan

Yiming Ma

Yan Zhang

Hanmin Wu

Laibo Sun

Shubin Huo

Ruisheng Huang

Shaowei Chen

Bing Du

Xiaomei Liang

Qilong Tang

Bao Jiang

Wei Li

Yajun Wu

Shanbao Zhang

Xiaochun Lv

Wei Feng

Dakui Fei

Zekun Yang

Dong Du

Bin Teng

Zhanli Yang

Ying Han

Xiucheng Xiao

Zhongwang Gong

Bei Song

Guangnan Zhao

Yujun Xu

Debin Bai

Jipeng Zou

Yongbo Yang

Xiaomei Sun

Naiwen Fang

Haoquan Yang

Yinglong Jiang

Bo Chen

Zijia Yang

The present disclosure relates to electro-conduction devices and methods for submerged arc welding of straight-seam steel pipes and in particular to a lateral electro-conduction device and method for multi-wire submerged arc inner/outer welding of a straight-seam steel pipe. The present disclosure aims to overcome the problem of poor closing of the electromagnetic field resulting from the existing negative-pole electro-conduction mechanism and the problem of unstable welding process resulting from bending deformation in the steel pipe welding process. The device includes: a floating surface contact electro-conduction device, capable of forming a surface contact with an outer surface of the straight-seam steel pipe; a lateral electro-conduction brush device, including multiple electro-conduction brushes and electrically connected with the floating surface contact electro-conduction device; a lateral electro-conduction metal plate. electrically connected with a negative-pole wire harness of a welding machine and electrically connected with the lateral electro-conduction brush device.

Lateral electro-conduction device and method for multi-wire submerged arc inner/outer welding of straight-seam steel pipe

Provided is a comprehensive quantitative evaluation method and system for welding usability of welding consumables. The evaluation method includes: obtaining welding data of target welding consumables; calculating metric values of the welding data corresponding to the target welding consumables, where the metric values include a mean and a variance; establishing a hierarchical structure model; establishing a priority relationship matrix of each level in the hierarchical structure model and calculating a weight set of each level; determining a corresponding membership function according to indicator data of the bottom level of welding usability of the target welding consumables, where the indicator data of the bottom level is the metric value of the welding data corresponding to the target welding consumables; and determining quantitative evaluation indicators of the usability of the target welding consumables using the weight set and a comment set calculated by the membership function according to the hierarchical structure model.

Comprehensive quantitative evaluation method and system for welding usability of welding consumables

Disclosed are a flux-cored welding strip and a welding flux used in combination for submerged arc welding of a duplex stainless steel, and preparation methods and use thereof. The flux-cored welding strip is composed of a stainless steel shell and a flux core powder, the flux core powder consisting of the following components: in percentages by mass, ferrochrome nitride: 0.70% to 1.0%, a chromium powder: 26% to 27%, a nickel powder: 4.5% to 5.5%, a molybdenum powder: 3.7% to 4.2%, a manganese powder: 2.55% to 2.65%, a copper powder: 1.45% to 1.55%, a ferrosilicon powder: 1.1% to 1.2%, a tungsten powder: 1.0% to 1.15%, a niobium powder: 0.25% to 0.35%, an aluminum powder: 0.35% to 0.55%, a rhenium powder: 0.35% to 0.40%, a lanthanum powder: 0.1% to 0.15%, and a balance being an iron powder.

Flux-cored welding strip and welding flux used in combination for submerged arc welding of duplex stainless steel, and preparation methods and use thereof

Disclosed are a narrow gap laser-TIG arc hybrid welding apparatus and method. The welding apparatus includes a welding gun body, a swing welding gun assembly, a welding wire feeding and heating assembly, and a gas conveying assembly; the swing welding gun assembly includes a welding gun rotating shaft, a stepper motor, a large gear, a pinion, an upper insulating sleeve, a lower insulating sleeve, a tungsten electrode clamp, and a tungsten electrode; the stepper motor is mounted on a motor connection seat; the pinion is mounted on the output shaft of the stepper motor; the large gear is mounted on the welding gun rotating shaft; the pinion is engaged with the large gear; the welding gun rotating shaft is mounted and positioned on the welding gun body; the tungsten electrode is mounted at the tail end of the welding gun rotating shaft by means of the tungsten electrode clamp.

Narrow gap laser-TIG arc hybrid welding apparatus and method

A high temperature resistant polyimide film and its preparation method. The present invention relates to a polyimide film and its preparation method and solves the problems of honeycomb's and skin panel's core adhesive-polyimide film with insufficient heat resistance, no climbing of bonding core structure and adhesive fillet formation. The high temperature resistant polyimide film is made by polyimide solution, inorganic filler modifier and interface coupling agent by the steps of: under specific temperature and stirring conditions, adding inorganic filler modifier and interface coupling agent to polyimide solution, stirring to obtain the adhesive agent; filtering and degassing the adhesive agent, casting to a stainless steel drum with carrier cloth and release paper to obtain a self-supporting film; then heating and annealing to obtain the final polyimide film. The present invention is applied to high temperature resistant polyimide film and its preparation method.

Heat resistant polyimide film

A high temperature resistant polyimide film and its preparation method. The present invention relates to a polyimide film and its preparation method and solves the problems of honeycomb's and skin panel's core adhesive&#x2014;polyimide film with insufficient heat resistance, no climbing of bonding core structure and adhesive fillet formation. The high temperature resistant polyimide film is made by polyimide solution, inorganic filler modifier and interface coupling agent by the steps of: under specific temperature and stirring conditions, adding inorganic filler modifier and interface coupling agent to polyimide solution, stirring to obtain the adhesive agent; filtering and degassing the adhesive agent, casting to a stainless steel drum with carrier cloth and release paper to obtain a self-supporting film; then heating and annealing to obtain the final polyimide film. The present invention is applied to high temperature resistant polyimide film and its preparation method.

Heat resistant polyimide film and preparation method thereof

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Harbin, China

Kai Xu