CN1135396A

CN1135396A - Special welding rod for railway switch

Info

Publication number: CN1135396A
Application number: CN 95110760
Authority: CN
Inventors: 王建军
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-05-09
Filing date: 1995-05-09
Publication date: 1996-11-13
Anticipated expiration: 2015-05-09
Also published as: CN1049170C

Abstract

On the surface of solder-stick core is pressure-coated with flux coating whose weight coefficient is 80-150%. Said flux coating is prepared from artificial rutile, marble, magnesia, medium carbon ferromanganese, metal manganese, ferromolybdenum, nickel powder, rave earth element, cann, metal chromium, and high-carbon chromium iron etc. according to a certain proportion. Said invention has the advantage of simplified welding technology, capable of conducting field welding by using ac. reduced cost, increased hardness, anti-cracking, anti-impacting and wear-resisting etc. performance.

Description

Special welding rod for railway switch

A kind ofly repair the welding material that railway switch is used.

Because rolling and impulsive force of train wheel, railway switch is easy to generate wearing and tearing most.After track switch may wear to a certain degree, will have a strong impact on traveling security, must be changed or be repaired.More renew track switch, expense height not only, and need closed-loop more than half an hour because of changeing track switch, influence the running on time of train.At present, mainly be to adopt repairing method with welding that track switch is repaired on the railway, used welding rod is the potassium steel welding rod.Under the impact of powerful wheel impacts power, the overlay cladding of above-mentioned welding rod occur easily collapsing the limit, phenomenon such as ftracture, peel off, thereby track switch is not long the service life after repairing.In addition, the welding procedure more complicated needs with heavy DC welder welding, or needs the stainless steel electrode bottoming, and side weld limit Jia Shui does not note making weld cracking slightly.

The purpose of this invention is to provide a kind of special welding rod for railway switch, accomplish that welding procedure is simple, on-the-spot welding and overlay cladding wear-resistant and crack-resistant prolong the service life after track switch is repaired.

The object of the present invention is achieved like this: the weldering stamen adopts H08A, its surface pressure scribbles coating, difference is that the weight percent proportioning of each component of coating is: synthetic rutile 5-12, marble 5-20, magnesia 2-10, mid-carbon fe-mn 6-25, manganese metal 6-21, molybdenum-iron 4-15, nickel powder 4-10, rare earth element 1-5, fluorite 3-5, crome metal 15-25, high carbon ferro-chrome 3-10, quartzy 1-4, feldspar 1-4, mica 1-4.Gravity coefficient of coating is 80-150%.The chemical composition of overlay cladding is:

C 0.2-0.8％ Mn?10-30％ Si?∠0.9％

Cr?7-20％ Mo?0.2-8％ Ni?0.2-8％

All the other are iron and trace rare-earth element.

Compared with the prior art, the present invention has following characteristics:

1, simplified welding procedure, can utilize A.C. welder directly welding at the scene, track switch need not be descended the road, only utilizes and carries out off time of train operation operation, guarantee train safe on schedule with save a large amount of maintenance costs.

2, owing to contain manganese, chromium, molybdenum, nickel and trace rare-earth element in the overlay cladding, therefore crack resistance and tough also improves a lot, anti-wear performance strengthens when hardness improves, thereby the service life after significant prolongation track switch is repaired.

Embodiments of the invention are as follows:

The weight proportion of example 1, each component of coating is: synthetic rutile 5%, marble 20%, magnesia 3%, mid-carbon fe-mn 8%, manganese metal 8%, molybdenum-iron 15%, nickel powder 5%, rare earth element 1%, fluorite 4%, crome metal 15%, high carbon ferro-chrome 10%, quartz 1%, feldspar 4%, mica 1%.

The weight proportion of example 2, each component of coating is: synthetic rutile 5%, marble 5%, magnesia 2%, mid-carbon fe-mn 25%, manganese metal 6%, molybdenum-iron 8%, nickel powder 4%, rare earth element 5%, fluorite 3%, crome metal 25%, high carbon ferro-chrome 3%, quartz 4%, feldspar 1%, mica 4%.

The weight proportion of example 3, each component of coating is: synthetic rutile 12%, marble 5%, magnesia 10%, mid-carbon fe-mn 6%, manganese metal 21%, molybdenum-iron 4%, nickel powder 10%, rare earth element 1%, fluorite 5%, crome metal 15%, high carbon ferro-chrome 7%, quartz 1%, feldspar 2%, mica 1%.

Preparation method of the present invention is as follows:

At first, be mixed with dry powder by a certain percentage with above-mentioned raw materials difference crushing and screening; Add waterglass in the dry powder then and stir into wet-milling; At last with the wet-milling extrusion on core wire, the oven dry get final product.

Claims

1, a kind of special welding rod for railway switch, its core wire surface pressure scribbles coating, gravity coefficient of coating is 80-150%, it is characterized in that the weight percent proportioning of each component of coating is: synthetic rutile 5-12, marble 5-20, magnesia 2-10, mid-carbon fe-mn 6-25, manganese metal 6-21, molybdenum-iron 4-15, nickel powder 4-10, rare earth element 1-5, fluorite 3-5, crome metal 15-25, high carbon ferro-chrome 3-10, quartzy 1-4, feldspar 1-4, mica 1-4.

2, according to claims 1 described special welding rod for railway switch, it is characterized in that the chemical composition of overlay cladding is:

C 0.2-0.8％ Mn?10-30％ Si?∠0.9％

Cr?7-20％ Mo?0.2-8％ Ni?0.2-8％

All the other are iron and trace rare-earth element.