# US 2019/0169722 A1 · Martensitic steel having a z-phase, powder and component

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2019/0169722 A1
- Document ID: US20190169722A1
- Status: Published application
- Kind: A1
- Application number: 16/092,462
- Filed: 2017-03-17
- Published: 2019-06-06
- Earliest claimed: 2016-04-15
- Assignees: Siemens Aktiengesellschaft
- Applicants: Siemens Aktiengesellschaft
- Inventors: Torsten Neddemeyer; Torsten-Ulf Kern; Axel Bublitz; Karsten Kolk
- Web page: https://patentgrep.com/patent/US20190169722A1

## CPC

- C22C 38/54: with boron
- C22C 33/0285: {with Cr, Co, or Ni having a minimum content higher than 5%}
- C22C 38/001: {containing N}
- C22C 38/02: containing silicon
- C22C 38/04: containing manganese
- C22C 38/06: containing aluminium
- C22C 38/40: with nickel
- C22C 38/44: with molybdenum or tungsten
- C22C 38/46: with vanadium
- C22C 38/48: with niobium or tantalum
- C22C 38/50: with titanium or zirconium
- C22C 38/52: with cobalt
- C22C: ALLOYS (treatment of alloys C21D, C22F)

## Abstract

A steel having the following composition: carbon: 0.08%-0.12%, preferably 0.10%; silicon: 0.04%-0.08%; manganese: 0.08%-0.012%; chromium: 9%-II%; molybdenum: 0.4%-1.0%; tungsten: 1.6%-2.4%; cobalt: 2.5%-3.5%; nickel: 0.10%-0.24%; boron: 0.006%-0.01%; nitrogen: 0.002%-0.01%; titanium: 0.008%-0.03%; vanadium: 0.015%-0.029%; niobium: 0.03%-0.07%; optionally copper: 1.00%-2.5%; aluminum: 0.04%-0.10%; the remainder being iron, wherein said steel has improved properties, since no further Z-phase formation occurs.

## Claims

### Claim 1

An alloy comprising at least (in % by weight):
carbon (C): 0.08%-0.12%,
silicon (Si): 0.04%-0.08%,
manganese (Mn): 0.08%-0.12%,
chromium (Cr): 9%-11%,
molybdenum (Mo): 0.4%-1.0%,
tungsten (W): 1.6%-2.4%,
cobalt (Co): 2.5%-3.5%,
nickel (Ni): 0.10%-0.25%,
boron (B): 0.006%-0.01%,
nitrogen (N): 0.002%-0.01%,
titanium (Ti): 0.008%-0.03%,
vanadium (V): 0.15%-0.25%,
niobium (Nb): 0.03%-0.07%,
optionally
copper (Cu): 1.25%-2.25%,
aluminum (Al): 0.04%-0.10%, and
balance iron (Fe),

### Claim 2 (depends on 1)

A powder comprising an alloy as claimed in claim 1.

### Claim 3 (depends on 1)

A component or blank comprising at least an alloy as claimed in claim 1.

### Claim 4 (depends on 1)

The alloy, powder or component as claimed in claim 1 containing copper.

### Claim 5 (depends on 1)

The alloy, powder or component as claimed in claim 1 which does not contain any copper.

### Claim 6 (depends on 1)

The alloy, powder or component as claimed in claim 1 containing
001%-0.004% of nitrogen,

### Claim 7 (depends on 1)

The alloy, powder or component as claimed in claim 1 containing
006%-0.010% of nitrogen.

### Claim 8 (depends on 1)

The alloy, powder or component as claimed in claim 1 containing
008%-0.012% of titanium.

### Claim 9 (depends on 1)

The alloy, powder or component as claimed in claim 1 containing
015%-0.03% of titanium.

### Claim 10 (depends on 1)

The alloy, powder or component as claimed in claim 1 containing aluminum.

### Claim 11 (depends on 1)

The alloy, powder or component as claimed in claim 1 which does not contain any aluminum.