Method of joining nodular cast iron to steel by means of fusion welding
US4817859A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 1987 |
| Grant date | Apr 4, 1989 |
| Priority date | — |
| Expiry date | Sep 22, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D2251/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A component made of nodular cast iron is joined to a component made of steel by means of fusion welding, a Fe alloy containing 2 to 4% by weight of silicon and seeding materials for the purpose of globular carbon precipitation in the welding zone being used as filler. Advantageously, the nodular cast iron component is provided beforehand with a build-up welding with Si-alloyed filler or with an unalloyed filler now alloyed with such a Si-alloyed filler, whereupon the weld joining to the steel component can be carried out with conventional iron electrodes. Preferred Si-alloyed filler: PA0 C=0.01-0.12% by weight, PA0 Mn=0.2-1.5% by weight, PA0 Si=1-4% by weight, PA0 Al=0.005-0.1% by weight, PA0 Mo=0.2-0.7% by weight, PA0 Ce=0.0001-0.02% by weight, PA0 Mg=0.0001-0.01% by weight, PA0 Zr=0.01-0.7% by weight, PA0 S=0.006% by weight max., PA0 P=0.01% by weight max., PA0 Fe=remainder
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.