From the damaged part in his hand, He Xiaojun saw that this thing had been connected by Xu Technician and them by welding.

However, it seems that this connection method of Xu technician will not work, because at this time, the weld on the damaged part is not only re-cracked under the force test, but also the crack is even bigger than the original.

After He Xiaojun looked at the object in his hand, he put it on the ground, then picked up a hammer beside him, knocked off a small piece of material at the edge of the crack in the damaged piece, picked it up and studied it in front of him.

After He Xiaojun studied the fragment of the damaged piece for a while, he said to Technician Xu: This connecting hook is a cast iron part. Moreover, it seems that the material of this casting belongs to the kind of cast iron with low strength and plasticity and loose structure, and the metal of this material is difficult to connect by welding.

Because the structure of the parts is loose and the strength is not high, it is easy to crack, so after the welding is completed, even if the welding place is firm, the metal near the weld cannot withstand the stress of the high temperature of welding and shrinking during cooling, resulting in many small fractures in the loosest parts of the tissue. These small fractures in many places not only tear the original fracture open again, but also make the crack larger because the metal near the crack is made.

In He Xiaojun's previous life, if he encountered such a material and needed to weld, he must use "stainless steel", "507" or "506" and other special-purpose high-performance electrodes to weld. However, even if these special electrodes are processed, they may not be effective for high-load things, and they are reinforced by other auxiliary methods.

At present, He Xiaojun doesn't know if there are those high-performance electrodes in his previous life, he only sees the welding rods used by Xu technicians, but those low-carbon structural steel electrodes that are ordinary to no longer be ordinary, and the processing results of this welding rod are of course far from meeting the requirements of the load.

After listening to He Xiaojun's analysis, Technician Xu and others admired him to the point that they also had hope for the repair of the damaged part.

When He Xiaojun was studying the damaged parts, Mayor Xie and the stationmaster of the railway station had already come to the scene.

After witnessing He Xiaojun's professional analysis process, the stationmaster's opinion of the young man in front of him not only changed, but also pinned his hopes on him, so after He Xiaojun's analysis, the stationmaster couldn't wait to come forward and ask him, asking if this thing could be repaired? What conditions do I need to fix it?

He Xiaojun didn't answer the stationmaster's question immediately, he thought about it for a while, but instead asked Technician Xu about their reserves of tools and maintenance materials here.

After learning about the situation, He Xiaojun thought about it for a while, and definitely replied to the stationmaster: He should be able to fix this big guy.

The overjoyed stationmaster hurriedly asked He Xiaojun to help, and he also said that if He Xiaojun could help repair this machine, he would definitely report to the board of directors and give He Xiaojun a heavy reward.

Mayor Xie also helped on the side, saying that if the train could not run, he Xiaojun, who had already prepared for the people's livelihood and reputation in this area, did not say anything more, and immediately took action.

He Xiaojun first sketched out the two opposite V-shapes with chalk on the two sections of the iron hook fracture, and asked Technician Xu to cut off that part according to his outline.

Then, He Xiaojun asked Technician Xu to take him to prepare the tools and materials he needed.

He Xiaojun needed thick steel plates, which he used to make an outer envelope for the damaged parts to strengthen the tensile strength of the fractures.

Technician Xu took He Xiaojun to the thick steel plate they put outside, and when he showed He Xiaojun with a flashlight, He Xiaojun, who was squatting down to watch, couldn't help but smile bitterly after touching the steel plate.

The ten-centimeter-thick steel plate that Technician Xu stored may have corroded very badly because it had been placed outside for a long time, and He Xiaojun wiped off layers of rust with his hand on the surface of the steel plate.

Seeing He Xiaojun's actions, Technician Xu explained that this steel plate was usually useless because they were not used, so it was moved outside, and under the sun and rain, it corroded with the passing of the days.

He Xiaojun said to Technician Xu that the steel plate that is too corroded is difficult to weld, because it is also like the loose materials of the iron hook, the rust layer is easy to peel off, so that the welding place is not forced, so the steel plate cannot be used in the current repair process.

After hearing that the only thick steel plate in this station could not be used, Xu Technician, who had already heard He Xiaojun say that the iron hook must be reinforced with a thick steel plate, couldn't help but be anxious, and hurriedly asked He Xiaojun what to do?

This steel plate must not be used, He Xiaojun asked Technician Xu, do they have any other steel plates here?

Technician Xu's brows furrowed, he thought for a while before he said, such a thick steel plate, they only have this one here, that is, other thicknesses of steel plates, they don't have the whole piece here, they only have some leftover steel plate leftovers here.

In this case, of course, He Xiaojun had to ask Technician Xu to take him to see their steel plate scrap inventory to see if he could choose the right material from them.

Following Technician Xu to a corner of the station's maintenance workshop, he came to a pile of steel plate scraps of different shapes, specifications and sizes, He Xiaojun squatted down, pulled up in this pile of steel plates, and selected suitable materials.

After searching for a while, He Xiaojun found a few pieces of steel sheet tail with a thickness of five or six centimeters.

Seeing this, Technician Xu asked He Xiaojun worriedly: Can these half-thin steel plates work?

He Xiaojun said, put the two together, isn't it thicker than the thick steel plate you just saw?

After listening to He Xiaojun's words, Technician Xu couldn't help but pat his head and blame himself for not being able to turn a corner.

Once you've found the right material, the next thing you need to do is cut the steel plate into the shape of the hook that surrounds it.

To make this crescent-shaped outer surrounding, it is necessary to use two pieces of material to make the shape of the crescent-shaped plane, and then use two pieces of materials to make the inner and outer arcs of the crescent-shaped shape, and put them together to complete the outer surrounding.

After the shape is drawn, of course, it is time to cut the material.

Of course, the processing settings of that year were much more backward than He Xiaojun's previous life, and many precision cutting equipment had not yet been born, and the steel plates were all cut with the gas cutting tools of oxygen and acetylene. Fortunately, the parts that He Xiaojun needs are not high in this regard, and it is enough to have this gas cut.

When Technician Xu took He Xiaojun to the place where the gas cutting was placed, he was about to call the master who was in charge of cutting the material here, and when he opened the material according to He Xiaojun's request, he found that He Xiaojun had already skillfully started his own hands.

Although the gas cutting equipment used at this time was old-fashioned equipment, which had already been eliminated in He Xiaojun's previous life, when he went to vocational school, he had introduced this equipment in theory, so he would still use it.

Technician Xu, who was paying attention to He Xiaojun's actions on the side, felt strange, this unpopular setting, even most people who do this line of work will not use it, not to mention, in this small city, maybe even in this place within a radius of hundreds of miles, they are the only ones who have such a setting here, this young He Xiaojun, how could he use this unpopular setting?

Hehe, although He Xiaojun is not a professional in the riveting and welding industry, he has systematically studied machinery for three years and has a certain theoretical foundation in this industry. Moreover, the maintenance fitter is called "jack-of-all-trades" in the machinery industry, which means that any technology will be able to get his hands on, so this simple manual work is not a small meaning for him?

From another point of view, He Xiaojun's actions today can be regarded as the first time he has come into contact with his old business in his previous life since he came to this other world.