CN1049170C

CN1049170C - Special welding rod for railway switch

Info

Publication number: CN1049170C
Application number: CN95110760A
Authority: CN
Inventors: 王建军
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-05-09
Filing date: 1995-05-09
Publication date: 2000-02-09
Anticipated expiration: 2015-05-09
Also published as: CN1135396A

Abstract

The present invention relates to a special welding rod for a railway switch. The surface of a welding core of the special welding rod is coated with a coating, the gravity coefficient of the coating is from 80 to 150%, and the coating is proportionally prepared from artificial rutile, marble, magnesite, mid-carbon ferromanganese, manganese metal, ferromolybdenum, nickel powder, rare earth elements, fluorite, chromium, high carbon ferrochrome, quartz, felspar and mica. The special welding rod can simplify the welding technology, utilize an AC welder for field welding, guarantee the safe and punctual running of trains, save a large amount of maintenance expense, increase the hardness, the crack resistance, the impact toughness and the abrasion resistance of a bead welding layer, and obviously increase the service life of the repaired rail switch.

Description

Repair 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 need or need the stainless steel electrode bottoming with the welding of the DC welder of heaviness, and side weld limit Jia Shui does not note making weld cracking slightly.

The purpose of this invention is to provide a kind of repairing 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: core wire adopts H08A, its surface pressure scribbles coating, and 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 foot of example 1, each component of coating: 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, add waterglass in the dry powder then and stir into wet-milling above-mentioned raw materials crushing and screening respectively, at last with the wet-milling extrusion on core wire, dry and get final product.

Claims

1, a kind of repairing 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 repairing 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.